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		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Junior Subordinated Debentures [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Junior subordinated debentures, Beginning Balance	$ 85,616	$ 83,453	$ 85,081	$ 82,905
Junior subordinated debentures, Change included in earnings	1,519	1,587	3,030	3,188
Junior subordinated debentures, Purchases and issuances	0	0	0	0
Junior subordinated debentures, Sales and settlements	(976)	(1,047)	(1,952)	(2,100)
Junior subordinated debentures, Ending Balance	86,159	83,993	86,159	83,993
Junior subordinated debentures, Net change in unrealized gains or (losses) relating to items held at end of period	1,519	1,587	3,030	3,188
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	3,946	1,452	1,478	1,749
Interest rate lock commitment, Change included in earnings	(3,946)	(1,452)	(1,478)	(1,749)
Interest rate lock commitment, Purchases and issuances	21,656	18,640	35,135	35,597
Interest rate lock commitment, Sales and settlements	(21,018)	(16,354)	(34,497)	(33,311)
Interest rate lock commitment, Ending Balance	638	2,286	638	2,286
Interest rate lock commitment, Net change in unrealized gains or (losses) relating to items held at end of period	638	2,286	638	2,286
Mortgage Servicing Rights [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mortgage servicing rights, Beginning Balance	32,097	20,210	27,428	18,184
Mortgage servicing rights, Change included in earnings	1,387	(1,030)	(346)	(1,952)
Mortgage servicing rights, Purchases and issuances	4,708	3,333	11,110	6,281
Mortgage servicing rights, Sales and settlements	0	0	0	0
Mortgage servicing rights, Ending Balance	38,192	22,513	38,192	22,513
Mortgage servicing rights, Net change in unrealized gains or (losses) relating to items held at end of period	$ 2,544	$ (84)	$ (344)	$ (197)