Loans Receivable And Allowance For Credit Losses Acquired Loans Discount Accretion (Details) (USD $)			3 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Evidence of Credit Deterioration [Member]	Sep. 30, 2012 Evidence of Credit Deterioration [Member]	Sep. 30, 2013 Evidence of Credit Deterioration [Member]	Sep. 30, 2012 Evidence of Credit Deterioration [Member]	Mar. 31, 2013 Evidence of Credit Deterioration [Member]	Mar. 31, 2012 Evidence of Credit Deterioration [Member]
Business Acquisition [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	$ 30,500,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	18,200,000	11,200,000
Unamortized portion of discounts on acquired loans	25,600,000	21,300,000
Accretion of Discount, Maturities, Interest Income, Remainder of Year	1,620,000
Accretion Of Discount Maturities Interest Income in Year Two	4,589,000
Accretion of Discount, Maturities, Interest Income in Year Three	2,982,000
Accretion of Discount, Maturities, Interest Income in Year Four	1,856,000
Accretion of Discount, Maturities, Interest Income in Year Five	1,284,000
Accretion of Discount, Maturities, Interest Income after Year Five	924,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance					1,332,000	0	2,748,000	2,331,000
Additions			0	0	1,774,000	1,923,000
Accretion to interest income			(454,000)	(223,000)	(1,156,000)	545,000
Reclassifications			209,000	(678,000)	553,000	(52,000)
Ending balance			$ 2,503,000	$ 1,430,000	$ 2,503,000	$ 1,430,000	$ 2,748,000	$ 2,331,000