Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments, Schedule of Fair Value Hedging Instruments (Details)

v3.6.0.2
Derivative Financial Instruments, Schedule of Fair Value Hedging Instruments (Details) - Designated as Hedging Instrument - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments, Gain (Loss)      
Gain (Loss) on Fair Value Hedges Recognized in Earnings $ (19,020) $ 8,894 $ 28,242
Interest Expense | Forward Contracts | Fair Value Hedges      
Derivative Instruments, Gain (Loss)      
Gain (Loss) on Fair Value Hedges Recognized in Earnings [1] $ (19,020) $ 8,894 $ 28,242
[1] Changes in the fair value hedges are substantially offset in earnings by changes in the hedged items.