Transfers of Financial Assets and Mortgage Servicing Assets Loan Repurchase Reserve (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reserve For Loan Respurchases [Roll Forward]
Beginning balance	$ 2,617	$ 2,269	$ 3,658
Provision	1,209	1,621	3,475
Loss on repurchased loans and settlements	(1,572)	(1,273)	(4,864)
Ending balance	$ 2,254	$ 2,617	$ 2,269