Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other assets [Member]
Gross derivative assets at fair value	$ 7,369	$ 7,812
Derivative assets, offsetting positions	6,793	5,642
Derivative assets, net amount	576	2,170
Derivative assets, cash collateral pledged	0	0
Derivative offset against collateral, net	576	2,170
Other assets [Member] | Interest rate caps [Member]
Gross derivative assets at fair value	81	134
Derivative assets, offsetting positions	0	0
Derivative assets, net amount	81	134
Derivative assets, cash collateral pledged	0	0
Derivative offset against collateral, net	81	134
Other assets [Member] | Interest rate swaps with customers [Member]
Gross derivative assets at fair value	3,952	4,920
Derivative assets, offsetting positions	3,457	2,884
Derivative assets, net amount	495	2,036
Derivative assets, cash collateral pledged	0	0
Derivative offset against collateral, net	495	2,036
Other assets [Member] | Mirror swaps with counterparties [Member]
Gross derivative assets at fair value	3,336	2,758
Derivative assets, offsetting positions	3,336	2,758
Derivative assets, net amount	0	0
Derivative assets, cash collateral pledged	0	0
Derivative offset against collateral, net	0	0
Other liabilities [Member]
Gross derivative liabilities at fair value	7,638	8,248
Derivative liabilities, offsetting positions	6,793	5,642
Derivative liabilities, net amount	845	2,606
Derivative liabilities, cash collateral pledged	1,816	1,428
Derivative offset against collateral, net	(971)	1,178
Other liabilities [Member] | Interest rate swaps with customers [Member]
Gross derivative liabilities at fair value	3,457	2,884
Derivative liabilities, offsetting positions	3,457	2,884
Derivative liabilities, net amount	0	0
Derivative liabilities, cash collateral pledged	0	0
Derivative offset against collateral, net	0	0
Other liabilities [Member] | Mirror swaps with counterparties [Member]
Gross derivative liabilities at fair value	4,007	4,986
Derivative liabilities, offsetting positions	3,336	2,758
Derivative liabilities, net amount	671	2,228
Derivative liabilities, cash collateral pledged	1,604	1,295
Derivative offset against collateral, net	(933)	933
Other liabilities [Member] | Interest rate swaps [Member]
Gross derivative liabilities at fair value	174	378
Derivative liabilities, offsetting positions	0	0
Derivative liabilities, net amount	174	378
Derivative liabilities, cash collateral pledged	212	133
Derivative offset against collateral, net	$ (38)	$ 245