Accumulated Other Comprehensive Income Reclassifications out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other expense	$ 1,351	$ 1,910	$ 2,398	$ 3,315
Income tax expense	1,419	236	2,837	259
Total, net of tax	(2,523)	(2,792)	(5,042)	(4,069)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total, net of tax	2	(445)	4	(445)
Unrealized gains (losses) on available for sale securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Securities gains, net	0	(720)	0	(720)
Income tax expense	0	275	0	275
Total, net of tax	0	(445)	0	(445)
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other expense	3	0	6	0
Income tax expense	(1)	0	(2)	0
Total, net of tax	$ 2	$ 0	$ 4	$ 0