Derivatives - Schedule of Unsettled Purchased Foreign Currency Forward Contracts (Details) - Long - Foreign currency forward contracts ₨ in Thousands, £ in Thousands, zł in Thousands, kr in Thousands, R$ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	Jun. 30, 2019 PLN (zł)	Jun. 30, 2019 BRL (R$)	Jun. 30, 2019 USD ($)	Jun. 30, 2019 INR (₨)	Jun. 30, 2019 SEK (kr)	Jun. 30, 2019 AUD ($)	Jun. 30, 2019 GBP (£)	Jun. 30, 2019 SGD ($)	Dec. 31, 2018 PLN (zł)	Dec. 31, 2018 BRL (R$)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 INR (₨)	Dec. 31, 2018 SEK (kr)	Dec. 31, 2018 AUD ($)	Dec. 31, 2018 GBP (£)	Dec. 31, 2018 SGD ($)
Polish Zloty
Derivative [Line Items]
Notional Amount	zł 242,500		$ 65,077						zł 23,950		$ 17,674
Average Contract Rate	0.2684	0.2684	0.2684	0.2684	0.2684	0.2684	0.2684	0.2684	0.7379	0.7379	0.7379	0.7379	0.7379	0.7379	0.7379	0.7379
Singapore Dollar
Derivative [Line Items]
Notional Amount			$ 43,500					$ 58,900			$ 5,678					$ 48,250
Average Contract Rate	0.7385	0.7385	0.7385	0.7385	0.7385	0.7385	0.7385	0.7385	0.1177	0.1177	0.1177	0.1177	0.1177	0.1177	0.1177	0.1177
British Pound Sterling
Derivative [Line Items]
Notional Amount			$ 23,764				£ 18,050				$ 26,525				£ 19,600
Average Contract Rate	1.3166	1.3166	1.3166	1.3166	1.3166	1.3166	1.3166	1.3166	1.3533	1.3533	1.3533	1.3533	1.3533	1.3533	1.3533	1.3533
Indian Rupee
Derivative [Line Items]
Notional Amount			$ 37,472	₨ 2,730,000							$ 39,956	₨ 2,880,000
Average Contract Rate	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139	0.0139
Australian Dollar
Derivative [Line Items]
Notional Amount			$ 14,341			$ 20,100					$ 44,504			$ 59,800
Average Contract Rate	0.7135	0.7135	0.7135	0.7135	0.7135	0.7135	0.7135	0.7135	0.7442	0.7442	0.7442	0.7442	0.7442	0.7442	0.7442	0.7442
Swedish Krona
Derivative [Line Items]
Notional Amount			$ 5,411		kr 48,300						$ 64,281		kr 232,500
Average Contract Rate	0.1120	0.1120	0.1120	0.1120	0.1120	0.1120	0.1120	0.1120	0.2765	0.2765	0.2765	0.2765	0.2765	0.2765	0.2765	0.2765
Brazilian Real
Derivative [Line Items]
Notional Amount		R$ 3,800	$ 874							R$ 14,300	$ 3,753
Average Contract Rate	0.2448	0.2448	0.2448	0.2448	0.2448	0.2448	0.2448	0.2448	0.2615	0.2615	0.2615	0.2615	0.2615	0.2615	0.2615	0.2615