Fair Value (Changes Level 3 assets (fair value, recurring)) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Interest rate lock commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1	$ 2,496	$ 1,809
Total gains (losses):
Included in earnings	3,832	2,422
Purchases, sales and settlements:
Issuances	2,530	2,038
Settlements	(2,300)	(3,773)
Balance at period end	6,558	2,496
Gain (loss) on sale of loans held-for-sale	6,600	2,500
Z-Tranche Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1	4,947	3,298
Total gains (losses):
Included in earnings	0	0
Included in other comprehensive income	696	1,783
Purchases, sales and settlements:
Purchases	6	0
Sales	0	0
Settlements	(122)	(134)
Balance at period end	5,527	4,947
Corporate Debt Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1	0	0
Total gains (losses):
Included in earnings	0	0
Included in other comprehensive income	0	0
Purchases, sales and settlements:
Purchases	0	0
Acquired	740	0
Sales	0	0
Settlements	0	0
Balance at period end	$ 740	$ 0