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Derivatives - Schedule of Unsettled Purchased Foreign Currency Forward Contracts (Details) - Long [Member] - Foreign currency forward contracts [Member] € in Thousands, ₨ in Thousands, £ in Thousands, SGD in Thousands, PLN in Thousands, AUD in Thousands, $ in Thousands	Mar. 31, 2017 GBP (£)	Mar. 31, 2017 AUD	Mar. 31, 2017 PLN	Mar. 31, 2017 USD ($)	Mar. 31, 2017 EUR (€)	Mar. 31, 2017 SGD	Dec. 31, 2016 GBP (£)	Dec. 31, 2016 AUD	Dec. 31, 2016 INR (₨)	Dec. 31, 2016 PLN	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 SGD
Australian Dollar [Member]
Derivative [Line Items]
Notional Amount		AUD 23,500		$ 17,582				AUD 17,000			$ 12,574
Average contract rate	0.7482	0.7482	0.7482	0.7482	0.7482	0.7482	0.7396	0.7396	0.7396	0.7396	0.7396	0.7396	0.7396
Euro [Member]
Derivative [Line Items]
Notional Amount											$ 2,031	€ 1,800
Average contract rate							1.1283	1.1283	1.1283	1.1283	1.1283	1.1283	1.1283
British Pound Sterling [Member]
Derivative [Line Items]
Notional Amount				$ 28,356	€ 22,050		£ 17,750				$ 23,691
Average contract rate	1.2860	1.2860	1.2860	1.2860	1.2860	1.2860	1.3347	1.3347	1.3347	1.3347	1.3347	1.3347	1.3347
Indian Rupee [Member]
Derivative [Line Items]
Notional Amount	£ 1,392,000			$ 20,280					₨ 1,174,500		$ 16,786
Average contract rate	0.0146	0.0146	0.0146	0.0146	0.0146	0.0146	0.0143	0.0143	0.0143	0.0143	0.0143	0.0143	0.0143
Polish Zloty [Member]
Derivative [Line Items]
Notional Amount			PLN 243,500	$ 60,949						PLN 258,250	$ 64,778
Average contract rate	0.2503	0.2503	0.2503	0.2503	0.2503	0.2503	0.2508	0.2508	0.2508	0.2508	0.2508	0.2508	0.2508
Singapore Dollar [Member]
Derivative [Line Items]
Notional Amount				$ 43,546		SGD 60,500					$ 34,383		SGD 47,700
Average contract rate	0.7198	0.7198	0.7198	0.7198	0.7198	0.7198	0.7208	0.7208	0.7208	0.7208	0.7208	0.7208	0.7208

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Average contractual rate at which a foreign currency can be purchased or sold.

+ References

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- Definition

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+ References

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