Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Long-term deferred tax assets
Goodwill, other intangibles and other assets and liabilities	$ 90,686	$ 95,275
Imputed interest deduction pursuant to tax receivable agreements	8,483	8,476
Rent liabilities	2,037	1,981
Compensation and benefits	1,606	2,056
Accrued liabilities	15	713
Allowance for doubtful accounts	979	768
Contingent acquisition liability	1,405
Other	840	442
Total deferred tax assets	106,051	109,711
Long-term deferred tax liabilities
Property and equipment and other long-lived assets	(414)	(466)
Total long-term deferred tax liabilities	(414)	(466)
Total deferred tax assets and liabilities	$ 105,637	$ 109,245