Income Taxes - Income (Loss) Before Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Domestic	$ (1,527)	$ (144)	$ 12,877
Foreign	14,153	12,950	24,645
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT)	$ 12,626	$ 12,806	$ 37,522