Derivatives (Offsetting Derivatives Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivative Liabilities
Total liability derivatives	$ 10,438	$ 37,063
Interest Rate Swap
Derivative Liabilities
Derivative liabilities, gross amounts of recognized liabilities	6,333	34,871
Derivative liability, fair value, gross asset	0	0
Total liability derivatives	6,333	34,871
Derivative Liability, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative liabilities, gross amounts not offset in the statement of financial position, financial instruments	(6,333)	(11,225)
Derivative liabilities, gross amounts not offset in the statement of financial position, collateral posted	0	(23,646)
Derivative liabilities, net amount	0	0
Foreign Exchange Contract
Derivative Liabilities
Derivative liabilities, gross amounts of recognized liabilities	298	874
Derivative liability, fair value, gross asset	0	0
Total liability derivatives	298	874
Derivative Liability, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative liabilities, gross amounts not offset in the statement of financial position, financial instruments	0	0
Derivative liabilities, gross amounts not offset in the statement of financial position, collateral posted	0	0
Derivative liabilities, net amount	$ 298	$ 874