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) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mortgage servicing rights, Beginning Balance			$ 47,765	$ 27,428
Mortgage servicing rights, Change included in earnings			(4,113)	(346)
Mortgage servicing rights, Purchases and issuances			70,540	11,110
Mortgage servicing rights, Sales and settlements			0	0
Mortgage servicing rights, Ending Balance	114,192	38,192	114,192	38,192
Mortgage servicing rights, Net change in unrealized gains or (losses) relating to items held at end of period			(394)	(344)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Interest rate lock commitment, Beginning Balance			706	1,478
Interest rate lock commitment, Change included in earnings			(4,118)	(1,478)
Interest rate lock commitment, Ending Balance	4,405	638	4,405	638
Junior Subordinated Debentures [Member] | Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Junior subordinated debentures, Beginning Balance	87,800	85,616	87,274		85,081
Junior subordinated debentures, Change included in earnings	3,277	1,519	4,767	3,030
Junior subordinated debentures, Purchases and issuances	156,840	0	156,840	0
Junior subordinated debentures, Sales and settlements	(1,840)	(976)	(2,804)	(1,952)
Junior subordinated debentures, Ending Balance	246,077	86,159	246,077	86,159	85,081
Junior subordinated debentures, Net change in unrealized gains or (losses) relating to items held at end of period	3,277	1,519	4,767	3,030
Interest Rate Lock Commitments [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Interest rate lock commitment, Beginning Balance	1,394	3,946
Interest rate lock commitment, Change included in earnings	(4,806)	(3,946)
Interest rate lock commitment, Purchases and issuances	12,937	21,656	16,177	35,135
Interest rate lock commitment, Sales and settlements	(5,120)	(21,018)	(8,360)	(34,497)
Interest rate lock commitment, Ending Balance	4,405	638	4,405	638
Interest rate lock commitment, Net change in unrealized gains or (losses) relating to items held at end of period	4,405	638	4,405	638
Mortgage Servicing Rights [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mortgage servicing rights, Beginning Balance	49,220	32,097
Mortgage servicing rights, Change included in earnings	(3,160)	1,387
Mortgage servicing rights, Purchases and issuances	68,132	4,708
Mortgage servicing rights, Sales and settlements	0	0
Mortgage servicing rights, Ending Balance	114,192	38,192	114,192	38,192
Mortgage servicing rights, Net change in unrealized gains or (losses) relating to items held at end of period	$ (2,601)	$ 2,544