$CSGP
COSTAR GROUP, INC. Stock $csgp

$csgp Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-Q Financial Statement

#000105735218000115 Filed on October 24, 2018

Income Statement

Concept	2018 Q4	2018 Q3	2017 Q3
Revenue	$315.6M	$305.5M	$247.5M
YoY Change	24.24%	23.43%	16.37%
Cost Of Revenue	$68.25M	$72.07M	$55.48M
YoY Change	17.06%	29.9%	31.41%
Gross Profit	$247.3M	$233.5M	$192.1M
YoY Change	26.39%	21.56%	12.65%
Gross Profit Margin	78.37%	76.41%	77.59%
Selling, General & Admin	$108.2M	$128.3M	$108.7M
YoY Change	-9.15%	17.99%	2.56%
% of Gross Profit	43.75%	54.94%	56.6%
Research & Development	$25.60M	$26.17M	$21.54M
YoY Change	17.43%	21.53%	11.26%
% of Gross Profit	10.35%	11.21%	11.21%
Depreciation & Amortization	$19.70M	$20.40M	$15.10M
YoY Change	28.76%	35.1%	122.25%
% of Gross Profit	7.97%	8.74%	7.86%
Operating Expenses	$141.7M	$162.8M	$134.5M
YoY Change	-2.25%	20.98%	2.78%
Operating Profit	$105.7M	$70.69M	$57.51M
YoY Change	108.16%	22.91%	45.25%
Interest Expense	$695.0K	$717.0K	$2.901M
YoY Change	-5.31%	-75.28%	16.13%
% of Operating Profit	0.66%	1.01%	5.04%
Other Income/Expense, Net	-$700.0K	$300.0K	-$2.200M
YoY Change	0.0%	-113.64%	29.41%
Pretax Income	$109.6M	$73.01M	$55.17M
YoY Change	125.03%	32.34%	47.34%
Income Tax	$26.06M	$14.25M	$20.99M
% Of Pretax Income	23.78%	19.51%	38.05%
Net Earnings	$83.51M	$58.76M	$34.18M
YoY Change	88.92%	71.93%	47.31%
Net Earnings / Revenue	26.46%	19.23%	13.81%
Basic Earnings Per Share	$2.31	$1.63	$1.05
Diluted Earnings Per Share	$2.29	$1.61	$1.04
COMMON SHARES
Basic Shares Outstanding	36.42M shares	36.13M shares	32.44M shares
Diluted Shares Outstanding		36.52M shares	32.81M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.100B	$1.072B	$623.0M
YoY Change	-9.17%	72.04%	19.05%
Cash & Equivalents	$1.100B	$1.072B	$623.0M
Short-Term Investments
Other Short-Term Assets	$23.70M	$25.20M	$16.20M
YoY Change	51.92%	55.56%	38.46%
Inventory
Prepaid Expenses
Receivables	$89.19M	$82.28M	$60.87M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.213B	$1.179B	$700.1M
YoY Change	-5.8%	68.45%	19.99%
LONG-TERM ASSETS
Property, Plant & Equipment	$83.30M	$81.94M	$84.33M
YoY Change	-1.41%	-2.83%	-1.22%
Goodwill	$1.612B	$1.549B	$1.283B
YoY Change	25.56%	20.71%	2.14%
Intangibles	$288.9M	$286.0M	$191.2M
YoY Change	57.97%	49.58%	-7.69%
Long-Term Investments	$10.10M	$10.10M	$10.00M
YoY Change	0.0%	1.0%	1.01%
Other Assets	$90.90M	$86.10M	$11.90M
YoY Change	683.62%	623.53%	14.42%
Total Long-Term Assets	$2.100B	$2.028B	$1.581B
YoY Change	32.43%	28.31%	0.72%
TOTAL ASSETS
Total Short-Term Assets	$1.213B	$1.179B	$700.1M
Total Long-Term Assets	$2.100B	$2.028B	$1.581B
Total Assets	$3.313B	$3.207B	$2.281B
YoY Change	15.3%	40.63%	5.95%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$6.327M	$10.11M	$11.32M
YoY Change	-31.69%	-10.68%	14.83%
Accrued Expenses	$29.82M	$33.50M	$33.07M
YoY Change	34.37%	1.29%	-0.54%
Deferred Revenue	$51.46M	$50.20M
YoY Change	12.64%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due			$36.91M
YoY Change			69.12%
Total Short-Term Liabilities	$154.2M	$153.5M	$176.6M
YoY Change	5.11%	-13.09%	15.07%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$268.6M
YoY Change		-100.0%	-14.92%
Other Long-Term Liabilities	$67.00M	$60.60M	$50.90M
YoY Change	5.51%	19.06%	-8.45%
Total Long-Term Liabilities	$67.00M	$60.60M	$268.6M
YoY Change		-77.44%	-14.92%
TOTAL LIABILITIES
Total Short-Term Liabilities	$154.2M	$153.5M	$176.6M
Total Long-Term Liabilities	$67.00M	$60.60M	$268.6M
Total Liabilities	$291.0M	$278.9M	$518.2M
YoY Change	30.98%	-46.17%	-2.94%
SHAREHOLDERS EQUITY
Retained Earnings	$613.5M	$529.9M
YoY Change	91.31%
Common Stock	$364.0K
YoY Change	0.83%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.022B	$2.928B	$1.762B
YoY Change
Total Liabilities & Shareholders Equity	$3.313B	$3.207B	$2.281B
YoY Change	15.3%	40.63%	5.95%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2017 Q3
OPERATING ACTIVITIES
Net Income	$83.51M	$58.76M	$34.18M
YoY Change	88.92%	71.93%	47.31%
Depreciation, Depletion And Amortization	$19.70M	$20.40M	$15.10M
YoY Change	28.76%	35.1%	122.25%
Cash From Operating Activities	$114.8M	$101.4M	$67.90M
YoY Change	60.78%	49.34%	19.12%
INVESTING ACTIVITIES
Capital Expenditures	-$7.800M	-$5.900M	-$7.100M
YoY Change	65.96%	-16.9%	65.12%
Acquisitions
YoY Change
Other Investing Activities	-$78.30M	$0.00	-$2.700M
YoY Change		-100.0%	-775.0%
Cash From Investing Activities	-$86.10M	-$6.000M	-$9.800M
YoY Change	1693.75%	-38.78%	151.28%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	600.0K	10.30M	-100.0K
YoY Change	-99.88%	-10400.0%	-102.0%
NET CHANGE
Cash From Operating Activities	114.8M	101.4M	67.90M
Cash From Investing Activities	-86.10M	-6.000M	-9.800M
Cash From Financing Activities	600.0K	10.30M	-100.0K
Net Change In Cash	29.30M	105.7M	58.00M
YoY Change	-95.02%	82.24%	-0.17%
FREE CASH FLOW
Cash From Operating Activities	$114.8M	$101.4M	$67.90M
Capital Expenditures	-$7.800M	-$5.900M	-$7.100M
Free Cash Flow	$122.6M	$107.3M	$75.00M
YoY Change	61.1%	43.07%	22.35%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017Q3	csgp	Amortization Of Intangible Assets Costof Revenue AmortizationOfIntangibleAssetsCostofRevenue	4200000	USD
	csgp	Amortization Of Intangible Assets Costof Revenue AmortizationOfIntangibleAssetsCostofRevenue	15089000	USD
CY2018Q3	csgp	Amortization Of Intangible Assets Costof Revenue AmortizationOfIntangibleAssetsCostofRevenue	5310000	USD
	csgp	Amortization Of Intangible Assets Costof Revenue AmortizationOfIntangibleAssetsCostofRevenue	15242000	USD
CY2017Q3	csgp	Amortization Of Intangible Assets Net Of Adjustments AmortizationOfIntangibleAssetsNetOfAdjustments	4298000	USD
	csgp	Amortization Of Intangible Assets Net Of Adjustments AmortizationOfIntangibleAssetsNetOfAdjustments	13642000	USD
CY2018Q3	csgp	Amortization Of Intangible Assets Net Of Adjustments AmortizationOfIntangibleAssetsNetOfAdjustments	8329000	USD
	csgp	Amortization Of Intangible Assets Net Of Adjustments AmortizationOfIntangibleAssetsNetOfAdjustments	22948000	USD
CY2018Q1	csgp	Contractwith Customer Asset Adoptionof New Accounting Principle ContractwithCustomerAssetAdoptionofNewAccountingPrinciple	1716000	USD
	csgp	Contractwith Customer Asset Effectsof Currency Translation ContractwithCustomerAssetEffectsofCurrencyTranslation	-219000	USD
	csgp	Contractwith Customer Liability New Deferrals Netof Amounts Recognizedin Current Period ContractwithCustomerLiabilityNewDeferralsNetofAmountsRecognizedinCurrentPeriod	48719000	USD
CY2017Q4	csgp	Deferredgainonthesaleofbuildingcurrent Deferredgainonthesaleofbuildingcurrent	2523000	USD
CY2018Q3	csgp	Deferredgainonthesaleofbuildingcurrent Deferredgainonthesaleofbuildingcurrent	2523000	USD
	csgp	Increase Decrease Deferred Commissions IncreaseDecreaseDeferredCommissions	0	USD
	csgp	Increase Decrease Deferred Commissions IncreaseDecreaseDeferredCommissions	-41421000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2952000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	6469000	USD
CY2017Q3	csgp	Netincomelossbeforeinterestandotherincomeexpenseincometaxesdepreciationandamortization Ebitda NetincomelossbeforeinterestandotherincomeexpenseincometaxesdepreciationandamortizationEBITDA	72632000	USD
	csgp	Netincomelossbeforeinterestandotherincomeexpenseincometaxesdepreciationandamortization Ebitda NetincomelossbeforeinterestandotherincomeexpenseincometaxesdepreciationandamortizationEBITDA	171335000	USD
CY2018Q3	csgp	Netincomelossbeforeinterestandotherincomeexpenseincometaxesdepreciationandamortization Ebitda NetincomelossbeforeinterestandotherincomeexpenseincometaxesdepreciationandamortizationEBITDA	91121000	USD
	csgp	Netincomelossbeforeinterestandotherincomeexpenseincometaxesdepreciationandamortization Ebitda NetincomelossbeforeinterestandotherincomeexpenseincometaxesdepreciationandamortizationEBITDA	225907000	USD
	csgp	Proceeds From Exercise Of Stock Options And Espp ProceedsFromExerciseOfStockOptionsAndEspp	9058000	USD
	csgp	Proceeds From Exercise Of Stock Options And Espp ProceedsFromExerciseOfStockOptionsAndEspp	25768000	USD
	csgp	Subscription Based Licensing Agreement Minimum Term Years SubscriptionBasedLicensingAgreementMinimumTermYears	P1Y
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
	dei	Document Period End Date DocumentPeriodEndDate	2018-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0001057352
CY2018Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	36419787	shares
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	COSTAR GROUP INC
	dei	Entity Small Business EntitySmallBusiness	false
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	9262000	USD
CY2018Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	10114000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	60900000	USD
CY2018Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	82279000	USD
CY2018Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	59033000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	8166000	USD
CY2018Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	1269000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	13354000	USD
CY2018Q3	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	15128000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	22193000	USD
CY2018Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	33500000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-730000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-730000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-8290000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-9759000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-9020000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-10489000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	23666000	USD
CY2017Q3	us-gaap	Advertising Expense AdvertisingExpense	25000000	USD
	us-gaap	Advertising Expense AdvertisingExpense	87000000	USD
CY2018Q3	us-gaap	Advertising Expense AdvertisingExpense	38000000	USD
	us-gaap	Advertising Expense AdvertisingExpense	108000000	USD
CY2017Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9743000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	29203000	USD
CY2018Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8953000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	30593000	USD
CY2017Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	31960000	USD
CY2018Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5668000	USD
	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	0	USD
CY2018Q3	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	12000000	USD
	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	36242000	USD
	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	36000000	USD
CY2017Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1000000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3000000	USD
CY2018Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1000000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2000000	USD
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2157000	USD
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	657000	USD
CY2017Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4298000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13642000	USD
CY2018Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8329000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	22948000	USD
CY2017Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	86000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	86000	shares
CY2018Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	77000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	77000	shares
CY2017Q4	us-gaap	Assets Assets	2873441000	USD
CY2018Q3	us-gaap	Assets Assets	3207222000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	1287935000	USD
CY2018Q3	us-gaap	Assets Current AssetsCurrent	1179268000	USD
CY2017Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	596154000	USD
CY2018Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	397088000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	USD
CY2018Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	730000	USD
CY2018Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	730000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	10800000	USD
CY2018Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	10800000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	0	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	0	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	10070000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	10070000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	10070000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	10070000	USD
CY2017Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.98
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.91
CY2018Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.74
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	4.62
CY2017Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.97
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.89
CY2018Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.72
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	4.57
CY2018Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	50195000	USD
CY2018Q1	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	43970000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	45686000	USD
CY2018Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	50195000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	61892000	USD
CY2018Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	62723000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	166553000	USD
CY2017Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	272961000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	788959000	USD
CY2018Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	305525000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	890013000	USD
	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	50000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	567223000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	622995000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1211463000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1071786000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	55772000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-139677000	USD
CY2017Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	35367000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	81923000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	58398000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	153356000	USD
CY2018Q3	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	3000000	USD
CY2018Q1	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	2000000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	45686000	USD
CY2018Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	43970000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	42275000	USD
CY2017Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	55483000	USD
	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	162102000	USD
CY2018Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	72072000	USD
	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	201685000	USD
CY2017Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	54464000	USD
CY2017Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	10070000	USD
CY2018Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	10070000	USD
CY2017Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	730000	USD
CY2018Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	730000	USD
CY2017Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	USD
CY2018Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	USD
CY2017Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
CY2018Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
CY2017Q3	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
CY2018Q3	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3561000	USD
CY2017Q4	us-gaap	Deferred Costs DeferredCosts	0	USD
CY2018Q3	us-gaap	Deferred Costs DeferredCosts	76062000	USD
CY2018Q1	us-gaap	Deferred Costs DeferredCosts	71118000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	4000000	USD
CY2018Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	4000000	USD
CY2017Q4	us-gaap	Deferred Gain On Sale Of Property DeferredGainOnSaleOfProperty	16192000	USD
CY2018Q3	us-gaap	Deferred Gain On Sale Of Property DeferredGainOnSaleOfProperty	14299000	USD
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	5431000	USD
CY2018Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2679000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6087000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7644000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	12070000	USD
CY2018Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	64865000	USD
CY2018Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	30440000	USD
CY2017Q4	us-gaap	Deferred Rent Credit Current DeferredRentCreditCurrent	4732000	USD
CY2018Q3	us-gaap	Deferred Rent Credit Current DeferredRentCreditCurrent	5386000	USD
CY2017Q4	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	33909000	USD
CY2018Q3	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	31146000	USD
CY2017Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	6179000	USD
CY2018Q3	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	7394000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	48277000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	58000000	USD
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.05
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.42
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.63
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.30
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.04
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.40
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.61
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.25
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	880000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-588000	USD
CY2017Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.38
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.33
CY2018Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.20
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.11
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	54104000	USD
CY2018Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	50483000	USD
CY2017Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	0	USD
CY2018Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	0	USD
CY2017Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	0	USD
CY2018Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	0	USD
CY2016Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	9952000	USD
CY2017Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	9952000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	266513000	USD
CY2017	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	2874000	USD
	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-994000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	192050000	USD
	us-gaap	Gross Profit GrossProfit	549137000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	233453000	USD
	us-gaap	Gross Profit GrossProfit	674576000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	55167000	USD
CY2017Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	9952000	USD
CY2017Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	10070000	USD
CY2018Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	10070000	USD
CY2018Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	10070000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	182892000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	285958000	USD
CY2017Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	0	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	0	USD
CY2018Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	0	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	0	USD
CY2017Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	35998000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	104550000	USD
CY2018Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	39012000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	117658000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	1254866000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	1283457000	USD
CY2018Q3	us-gaap	Goodwill Goodwill	1548976000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	25717000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	116367000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	73006000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	174446000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20990000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	37876000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14247000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19621000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	26263000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	25544000	USD
CY2017Q4	us-gaap	Income Taxes Receivable Noncurrent IncomeTaxesReceivableNoncurrent	12981000	USD
CY2018Q3	us-gaap	Income Taxes Receivable Noncurrent IncomeTaxesReceivableNoncurrent	14878000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	11888000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-13443000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	15809000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	19038000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	5969000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	6454000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-3387000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-1396000	USD
CY2018Q3	us-gaap	Liabilities Current LiabilitiesCurrent	153470000	USD
CY2017Q4	us-gaap	Long Term Investments LongTermInvestments	10070000	USD
CY2018Q3	us-gaap	Long Term Investments LongTermInvestments	10070000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-40894000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2102000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-67521000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-361875000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1190000	USD
CY2017Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	370000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	330000	shares
CY2018Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	389000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	407000	shares
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	182892000	USD
CY2018Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	285958000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	2901000	USD
	us-gaap	Interest Expense InterestExpense	8280000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	717000	USD
	us-gaap	Interest Expense InterestExpense	2135000	USD
CY2017Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	8000000	USD
CY2017Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	3000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	6121000	USD
	us-gaap	Interest Paid Net InterestPaidNet	999000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	222191000	USD
CY2018Q3	us-gaap	Liabilities Liabilities	278908000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2873441000	USD
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3207222000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	146666000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	163307000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	220684000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	34177000	USD
	us-gaap	Net Income Loss NetIncomeLoss	78491000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	58759000	USD
	us-gaap	Net Income Loss NetIncomeLoss	154825000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	operating_segments
CY2017Q3	us-gaap	Operating Expenses OperatingExpenses	134537000	USD
	us-gaap	Operating Expenses OperatingExpenses	426079000	USD
CY2018Q3	us-gaap	Operating Expenses OperatingExpenses	162765000	USD
	us-gaap	Operating Expenses OperatingExpenses	506669000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	57513000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	123058000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	70688000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	167907000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1190000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	3432000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-361000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1469000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3432000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	23666000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	47767000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-361000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1469000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2017Q3	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	6621000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	19546000	USD
CY2018Q3	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	6794000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	19810000	USD
CY2017Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	555000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1589000	USD
CY2018Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3035000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	8674000	USD
	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	36366000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	643000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	14309000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	340074000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	19754000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	21801000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	15572000	USD
CY2018Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	25203000	USD
CY2018Q1	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	17439000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	84496000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	81937000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3992000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	4519000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	35000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2017Q3	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	21536000	USD
	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	67054000	USD
CY2018Q3	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	26173000	USD
	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	75357000	USD
CY2018Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	529945000	USD
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	375120000	USD
CY2017Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	247533000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	711239000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	305525000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	876261000	USD
CY2017Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	247533000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	711239000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	305525000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	876261000	USD
CY2018Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	90000000	USD
CY2018Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P3Y
CY2018Q3	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	15402000	USD
	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	51521000	USD
CY2017Q3	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	72705000	USD
	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	240833000	USD
CY2018Q3	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	89251000	USD
	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	290706000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	29203000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	30593000	USD
CY2017Q3	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	3532	shares
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	81815	shares
CY2018Q3	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	53516	shares
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	176291	shares
	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	36366000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	4235000	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	30353000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	21956000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	2651250000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	2928314000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	2705714000	USD
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32814000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32705000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36518000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36439000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32444000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32375000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36129000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36032000	shares
	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Cost of Revenues</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Cost of revenues principally consists of salaries, benefits, bonuses and stock-based compensation expenses for the Company's researchers who collect and analyze the commercial real estate data that is the basis for the Company's information, analytics and online marketplaces. Additionally, cost of revenues includes the cost of data from third-party data sources, credit card and other transactions fees relating to processing customer transactions, which are expensed as incurred, and the amortization of acquired trade names and other intangible assets and database technology.</font></div></div>
	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">ORGANIZATION</font><font style="font-family:inherit;font-size:10pt;font-weight:bold;"> </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CoStar Group, Inc. (the “Company” or “CoStar”) provides information, analytics and online marketplace services to the commercial real estate and related business community through its comprehensive, proprietary database of commercial real estate information covering the United States (“U.S.”), the United Kingdom (“U.K.”), and parts of Canada, Spain, Germany and France. The Company provides online marketplaces for commercial real estate, apartment rentals, lands for sale and businesses for sale. The Company operates within </font><font style="font-family:inherit;font-size:10pt;">two</font><font style="font-family:inherit;font-size:10pt;"> operating segments, North America and International, and its services are typically distributed to its clients under subscription-based license agreements that renew automatically, a majority of which have a term of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">one year</font><font style="font-family:inherit;font-size:10pt;">.</font></div></div>
	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. On an ongoing basis, the Company evaluates its estimates and assumptions, including those related to revenue recognition, allowance for doubtful accounts, useful lives of property and equipment, intangible assets and deferred commissions, recoverability of long-lived assets and intangible assets with definite lives, goodwill, income taxes, fair value of equity instruments, fair value of auction rate securities (“ARS”), accounting for business combinations and loss contingencies, among others. The Company bases these estimates on historical and anticipated results, trends, and various other assumptions that it believes are reasonable, including assumptions as to future events. These estimates form the basis for making judgments about the carrying values of assets and liabilities and recorded revenues and expenses. Actual results could differ from these estimates.</font></div></div>

Files In Submission

Name	View Source	Status
0001057352-18-000115-index-headers.html	Edgar Link	pending
0001057352-18-000115-index.html	Edgar Link	pending
0001057352-18-000115.txt	Edgar Link	pending
0001057352-18-000115-xbrl.zip	Edgar Link	pending
csgp-20180930.xml	Edgar Link	completed
csgp-20180930.xsd	Edgar Link	pending
csgp-20180930_cal.xml	Edgar Link	unprocessable
csgp-20180930_def.xml	Edgar Link	unprocessable
csgp-20180930_lab.xml	Edgar Link	unprocessable
csgp-20180930_pre.xml	Edgar Link	unprocessable
csgp-9302018x10q.htm	Edgar Link	pending
csgp-9302018xex312.htm	Edgar Link	pending
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csgp-9302018xex322.htm	Edgar Link	pending
csgp-logoa01a13.jpg	Edgar Link	pending
csgp9302018-ex311.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
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$CSGP
COSTAR GROUP, INC. Stock $csgp

2018 Q4 Form 10-Q Financial Statement

#000105735218000115 Filed on October 24, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSGP COSTAR GROUP, INC. Stock $csgp

2018 Q4 Form 10-Q Financial Statement

#000105735218000115 Filed on October 24, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSGP
COSTAR GROUP, INC. Stock $csgp