Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal tax	$ 8,762	$ 14,214	$ 30,097
State income taxes, net of federal tax provision	(65)	(152)	18
Foreign income taxed at lower tax rates	(6,955)	(10,126)	(9,421)
U.S. tax impact of foreign operations	324	2,046	365
Foreign withholding taxes	4,834	2,268	3,694
Research and development	(2,241)	(2,068)	(2,666)
Liability for unrecognized tax benefits	1,815	88	(556)
Valuation allowance	(2,600)	3,580	876
Provision-to-return adjustments	(61)	994	(1,925)
Other	2,745	3,238	(123)
Total income tax provision	$ 6,558	$ 14,082	$ 20,359
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Income tax rate, Federal tax	35.00%	35.00%	35.00%
Income tax rate, State income taxes, net of federal tax provision	(0.30%)	(0.40%)
Income tax rate, Foreign income taxed at lower tax rates	(27.80%)	(24.90%)	(11.00%)
Income tax rate, U.S. tax impact of foreign operations	1.30%	5.00%	0.40%
Income tax rate, Foreign withholding taxes	19.30%	5.60%	4.30%
Income tax rate, Research and development	(9.00%)	(5.10%)	(3.10%)
Income tax rate, Liability for unrecognized tax benefits	7.30%	0.20%	(0.60%)
Income tax rate, Valuation allowance	(10.40%)	8.80%	1.00%
Income tax rate, Provision-to-return adjustment	(0.20%)	2.40%	(2.20%)
Income tax rate, Other	11.00%	8.10%	(0.10%)
Income tax rate, Total	26.20%	34.70%	23.70%