Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Tax Assets
Tax net operating loss carryforwards	$ 48,722	$ 20,839
Compensation related	7,212	12,523
Other	2,564	4,119
Total deferred tax assets	58,498	37,481
Valuation allowance	(47,955)	(20,419)
Total deferred tax asset, net of valuation allowance	10,543	17,062
Deferred Tax Liabilities
Intangible assets	119,885	177,846
Property and equipment	5,601	9,481
Other	1,926	6,213
Total gross deferred tax liability	127,412	193,540
Net deferred tax liability	$ 116,869	$ 176,478