Income Taxes - Schedule of Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax rate	$ 6,907	$ (7,662)	$ (851)
U.S. state and local income taxes, net of U.S. federal income tax benefits	1,430	(1,075)	(69)
Unrecognized tax benefit	(9)	(603)	589
Valuation allowance	89	1,208	0
Non-taxable income	(1,055)	(1,267)	(696)
Provision to return adjustments	(1,277)	(4,167)	442
Impact of the TCJA	(9,013)	0	0
Change in state and foreign tax rates	(353)	264	305
Foreign tax rate differentials	974	143	145
Excess tax benefits from share-based awards	(493)	0	0
Other non-deductible expenses	666	897	541
Current and Deferred Income Tax Expense (Benefit) from Continuing Operations	$ (2,134)	$ (12,262)	$ 406
U.S. federal statutory income tax rate, percent	35.00%	35.00%	35.00%
U.S. state and local income taxes, net of U.S. federal income tax benefits, percent	7.20%	4.90%	2.80%
Unrecognized tax benefits, percent	0.00%	2.80%	(24.30%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	0.50%	(5.50%)	0.00%
Other, percent	(5.30%)	5.80%	28.70%
Adjustment to reflect prior year tax return filings, percent	(6.50%)	19.00%	(18.20%)
Effective Income Tax Reconciliation, impact of the TCJA Tax Reform, Percent	(45.70%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	(1.80%)	(1.20%)	(12.50%)
Non-U.S. operations, percent	4.90%	(0.70%)	(6.00%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent	(2.50%)	0.00%	0.00%
Business promotion and other non-deductible expenses, percent	3.40%	(4.10%)	(22.20%)
Total income tax expense, percent	(10.80%)	56.00%	(16.70%)