Derivative Instruments, Gain(Loss) (Details) (Not Designated as Hedging Instrument, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	$ 531	$ 1,246	$ 778	$ 584
Mortgage loan commitments | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	916	(3,374)	1,600	(3,622)
Forward sales contracts | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	(713)	4,742	(929)	4,519
Credit Risk Contract | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	$ 328	$ (122)	$ 107	$ (313)