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Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred Tax Assets    
Tax net operating loss carryforwards $ 20,839 $ 18,109
Compensation related 11,692 13,130
Other 2,810 6,920
Total deferred tax assets 35,341 38,159
Valuation allowance (20,419) (17,791)
Total deferred tax asset, net of valuation allowance 14,922 20,368
Deferred Tax Liabilities    
Intangible assets 168,748 155,212
Property and equipment 8,975 7,882
Deferred sales commissions 4,439 5,270
State taxes 8,723 8,248
Other 515 714
Total gross deferred tax liability 191,400 177,326
Net deferred tax liability $ 176,478 $ 156,958