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	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Junior Subordinated Debentures [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Junior subordinated debentures, Beginning Balance	$ 85,081	$ 82,905
Junior subordinated debentures, Change included in earnings	1,511	1,601
Junior subordinated debentures, Purchases and issuances	0	0
Junior subordinated debentures, Sales and settlements	(976)	(1,053)
Junior subordinated debentures, Ending Balance	85,616	83,453
Junior subordinated debentures, Net change in unrealized gains or (losses) relating to items held at end of period	1,511	1,601
Interest Rate Lock Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Interest rate lock commitment, Beginning Balance	1,478	1,749
Interest rate lock commitment, Change included in earnings	(4,065)	1,970
Interest rate lock commitment, Purchases and issuances	20,012	14,690
Interest rate lock commitment, Sales and settlements	(13,479)	(16,957)
Interest rate lock commitment, Ending Balance	3,946	1,452
Interest rate lock commitment, Net change in unrealized gains or (losses) relating to items held at end of period	(1,598)	1,673
Mortgage Servicing Rights [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mortgage servicing rights, Beginning Balance	27,428	18,184
Mortgage servicing rights, Change included in earnings	(1,734)	(922)
Mortgage servicing rights, Purchases and issuances	6,403	2,948
Mortgage servicing rights, Sales and settlements	0	0
Mortgage servicing rights, Ending Balance	32,097	20,210
Mortgage servicing rights, Net change in unrealized gains or (losses) relating to items held at end of period	$ (512)	$ 24