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		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	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	$ 86,159	$ 83,993
Junior subordinated debentures, Change included in earnings	1,533	1,592	4,563	4,780
Junior subordinated debentures, Purchases and issuances	0	0	0	0
Junior subordinated debentures, Sales and settlements	(974)	(1,047)	(2,926)	(3,147)
Junior subordinated debentures, Ending Balance	86,718	84,538	86,718	84,538	86,159	83,993
Junior subordinated debentures, Net change in unrealized gains or (losses) relating to items held at end of period	1,533	1,592	4,563	4,780
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	638	2,286
Interest rate lock commitment, Change included in earnings	(638)	(2,286)	(1,478)	(1,749)
Interest rate lock commitment, Purchases and issuances	17,695	37,494	52,192	70,806
Interest rate lock commitment, Sales and settlements	(14,687)	(33,528)	(49,184)	(66,840)
Interest rate lock commitment, Ending Balance	3,008	3,966	3,008	3,966	638	2,286
Interest rate lock commitment, Net change in unrealized gains or (losses) relating to items held at end of period	3,008	3,966	3,008	3,966
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	38,192	22,513
Mortgage servicing rights, Change included in earnings	(411)	(3,666)	(757)	(5,618)
Mortgage servicing rights, Purchases and issuances	4,072	5,642	15,182	11,923
Mortgage servicing rights, Sales and settlements	0	0	0	0
Mortgage servicing rights, Ending Balance	41,853	24,489	41,853	24,489	38,192	22,513
Mortgage servicing rights, Net change in unrealized gains or (losses) relating to items held at end of period	$ 746	$ (2,720)	$ (755)	$ (2,570)