Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reconciliation between the statutory federal income tax rate and the effective income tax rate      
Federal statutory income tax rate (as a percent) 35.00% 35.00% 34.00%
State income tax rate, net of federal tax benefit (as a percent) (0.70%) 0.70% 0.70%
Foreign income tax rate (as a percent)   0.60% 0.10%
Impairment of goodwill (2.20%)    
Partnership income not subject to tax (as a percent) (32.10%) (40.80%) (34.00%)
Effective income tax rate (as a percent)   (4.50%) 0.80%
Current:      
Federal $ 14,499 $ 110 $ (91)
State 4,345 1,388 877
Foreign (9) 253 188
Total current 18,835 1,751 974
Deferred:      
Federal (13,480) (1,298) 948
State (5,302) (2,326) (959)
Total deferred (18,782) (3,624) (11)
Income Tax Expense (Benefit), Total $ 53 $ (1,873) $ 963