Commitments, Off-Balance Sheet Arrangements and Contingent Liabilities Residential Mortgage Repurchase Reserve (Details) (Mortgage Repurchase Reserve [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Mortgage Repurchase Reserve [Member]
Residential mortgage repurchase reserve
Balance at beginning of period	$ 5,700	$ 3,300
Repurchase provision expense	(638)	5,909
Charge offs	262	3,509
Balance at end of period	$ 4,800	$ 5,700