Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax liabilities:
Property and equipment	$ 6,858	$ 7,093
Intangible assets	24,987	21,668
Prepaid expenses	619	374
Total deferred tax liabilities	32,464	29,135
Deferred tax assets:
Allowance for doubtful accounts	224	226
Compensation	2,421	2,210
Other accrued liabilities	78	118
Deferred Tax Assets, Gross, Total	2,723	2,554
Less: valuation allowance	0	0
Total net deferred tax assets	2,723	2,554
Net deferred tax liabilities	29,741	26,581
Current portion of deferred tax assets	1,022	1,107
Non-current portion of deferred tax liabilities	(30,763)	(27,688)
Net deferred tax liabilities	$ (29,741)	$ (26,581)