Loans Receivable And Allowance For Credit Losses Acquired Loans Discount Accretion (Details) (USD $)			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	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	$ 37,000,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	22,500,000
Unamortized portion of discounts on acquired loans	27,000,000	21,300,000
Accretion of Discount, Maturities, Interest Income, Remainder of Year	2,938,000
Accretion Of Discount Maturities Interest Income in Year Two	2,796,000
Accretion of Discount, Maturities, Interest Income in Year Three	1,724,000
Accretion of Discount, Maturities, Interest Income in Year Four	1,032,000
Accretion of Discount, Maturities, Interest Income in Year Five	679,000
Accretion of Discount, Maturities, Interest Income after Year Five	434,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance			1,332,000	0
Additions			1,774,000	1,923,000
Accretion to interest income			(205,000)	(14,000)
Reclassifications			160,000	0
Ending balance			$ 3,061,000	$ 1,909,000