Fair Value Measurement (Schedule Of Reconciliation Of Assets And Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Level 3) On A Recurring Basis) (Details) (Level 3 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage servicing rights, Beginning Balance	$ 18,184	$ 14,454
Mortgage servicing rights, Change included in earnings	(8,466)	2,990
Mortgage servicing rights, Purchases and issuances	17,710	6,720
Mortgage servicing rights, Ending Balance	27,428	18,184
Mortgage servicing rights, Net change in unrealized gains or (losses) relating to items held at end of period	(3,778)	(961)
Junior subordinated debentures, Beginning Balance	82,905	80,688
Junior subordinated debentures, Change included in earnings	6,350	6,134
Junior subordinated debentures, Sales and settlements	(4,174)	(3,917)
Junior subordinated debentures, Ending Balance	85,081	82,905
Junior subordinated debentures, Net change in unrealized gains or (losses) relating to items held at end of period	$ 6,350	$ 6,134