Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed income tax expense at statutory federal income tax rate of 35%	$ 13,277	$ 14,450	$ 9,670
State income taxes, net of federal provision	1,713	227	345
Foreign tax rate differentials	(1,181)	(1,262)	77
U.S. tax on foreign earnings (net of foreign tax credits)	(948)	(2,168)	(1,831)
Change in valuation allowance	(944)	(11,650)	(2,184)
Proceeds from life insurance		(133)	(196)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	(1,557)	(1,401)	1,664
Other, net	133	2,046	765
Income tax expense	$ 10,493	$ 109	$ 8,310
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Computed income tax expense at statutory federal income tax rate of 35%, tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal provision, tax rate	4.50%	0.50%	1.20%
Foreign tax differentials rate	(3.10%)	(3.10%)	0.30%
U.S. tax on foreign earnings rate	(2.50%)	(5.30%)	(6.60%)
Change in valuation allowance, tax rate	(2.50%)	(28.20%)	(7.90%)
Proceeds from life insurance rate		(0.30%)	(0.70%)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent	(4.10%)	(3.40%)	6.00%
Other, net, tax rate	0.40%	5.00%	2.80%
Income tax expense	27.70%	0.20%	30.10%