Fair Value Measurements Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Available-for-sale Securities [Member]
Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3)
Beginning Balance	$ 480	$ 856
Total net gain (losses) included in income:
Sale of investment securities	(111)	(425)
Total net gains included in other comprehensive income
Investment securities gains	(70)	49
Ending Balance	299	480
Derivatives [Member]
Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3)
Beginning Balance	7,647	(200)
Total net gain (losses) included in income:
Mortgage derivative gain (loss), net	(5,930)	7,847
Total net gains included in other comprehensive income
Ending Balance	$ 1,717	$ 7,647