Derivatives (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Presentation of Derivative Amounts

	At December 31,
	2016			2015
($ thousands)	Assets	Liabilities		Assets	Liabilities
Fair Value Hedges: Interest Rate Swaps
Non-current financial liabilities	—	13,709		—	8,958
Long-term debt	—	(9,123	)	—	(9,195	)
Gross Derivatives	—	4,586		—	(237	)
Non-Designated Hedges: Foreign Currency Contracts, net
Current financial assets	4,965	—		4,829	—
Current financial liabilities	—	126		—	750
Cash Flow Hedges: Foreign Currency Contracts, net
Current financial assets	3,374	—		173	—
Counterparty Netting: Swap Interest
Current financial assets:
Interest due from counterparty	1,079	—		1,963	—
Net Derivatives	9,418	4,712		6,965	513

	For the year ended December 31,
($ thousands)	2016		2015		2014
Fair Value Hedges: Interest Rate Swaps
Effectiveness - Contra interest expense	—		—		4,885
Ineffectiveness - Contra interest expense	—		—		421
Effectiveness - Other income	(540	)	1,646		—
Ineffectiveness - Other income	(1,280	)	232		—
Non-Designated Hedges: Foreign Currency Contracts, net
Realized gains (losses) - Foreign exchange gain (loss), net	16,873		(16,651	)	(33,430	)
Cash Flow Hedges: Foreign Currency Contracts, net
Realized gains - Service revenue	5,218		244		640