Derivatives (Offsetting Derivatives Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Derivative Liabilities
Total liability derivatives	$ 5,660	$ 37,063
Interest Rate Swap
Derivative Liabilities
Derivative liabilities, gross amounts of recognized liabilities	4,348	34,871
Derivative liability, fair value, gross asset	0	0
Total liability derivatives	4,348	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	(4,348)	(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	399	874
Derivative liability, fair value, gross asset	0	0
Total liability derivatives	399	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	$ 399	$ 874