Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal tax	$ 14,214	$ 30,097	$ 13,501
State income taxes, net of federal tax provision (benefit)	(152)	18	29
Foreign income taxed at lower tax rates	(10,126)	(9,421)	(8,363)
U.S. tax impact of foreign operations	2,046	365	608
Foreign withholding taxes	2,268	3,694	866
Goodwill impairment			904
Research and development	(2,068)	(2,666)	(2,294)
Liability for unrecognized tax benefits	88	(556)	7,802
Valuation allowance	3,580	876	868
Provision-to-return adjustments	994	(1,925)	554
Other	3,238	(123)	6
Total income tax provision	$ 14,082	$ 20,359	$ 14,481
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	(0.40%)		0.10%
Income tax rate, Foreign income taxed at lower tax rates	(24.90%)	(11.00%)	(21.70%)
Income tax rate, U.S. tax impact of foreign operations	5.00%	0.40%	1.60%
Income tax rate, Foreign withholding taxes	5.60%	4.30%	2.20%
Income tax rate, Goodwill impairment			2.30%
Income tax rate, Research and development	(5.10%)	(3.10%)	(5.90%)
Income tax rate, Liability for unrecognized tax benefits	0.20%	(0.60%)	20.20%
Income tax rate, Valuation allowance	8.80%	1.00%	2.30%
Income tax rate, Provision-to-return adjustment	2.40%	(2.20%)	1.40%
Income tax rate, Other	8.10%	(0.10%)
Income tax rate, Total	34.70%	23.70%	37.50%