Fair Value Measurement (Details) (USD $)	3 Months Ended							6 Months Ended				12 Months Ended
	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011		Dec. 31, 2010	Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011		Dec. 31, 2010	Mar. 31, 2012	Mar. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset at Amortized Cost	$ 21,273,000		$ 21,179,000		$ 21,094,000		$ 21,317,000	$ 21,273,000		$ 21,094,000		$ 21,179,000		$ 21,317,000	$ 20,946,000	$ 21,539,000
Recurring Fair Value Measurements
Available for sale securities			3,353,553,000		3,498,272,000					3,498,272,000		3,353,553,000
Loans held for sale	19,018,000		30,077,000		22,951,000			19,018,000		22,951,000		30,077,000
Derivative Asset, Fair Value, Gross Asset	65,418,000		62,056,000		47,809,000			65,418,000		47,809,000		62,056,000
Derivative Liability, Fair Value, Gross Liability	84,602,000		86,106,000		72,037,000			84,602,000		72,037,000		86,106,000
Nonrecurring Fair Value Measurement [Abstract]
Mortgage servicing rights	17,913,000							17,913,000								20,766,000
Servicing Asset at Amortized Value, Valuation Allowance	(3,488,000)		(2,193,000)		(350,000)		0					(3,539,000)		0
Servicing Asset at Amortized Value, Recoveries	(1,295,000)				(350,000)			51,000		(350,000)		(3,539,000)
Impaired Financing Receivable, Related Allowance	10,991,000		7,080,000		6,416,000			10,991,000		6,416,000		7,080,000
Loss on Re-measurement of Foreclosed Assets, Fair Value Disclosure	400,000				900,000							5,400,000
Loss on Re-measurement of Covered Foreclosed Assets, Fair Value Disclosure	700,000				700,000							3,000,000
MSR Net Carrying Amount	17,785,000		17,640,000		20,744,000			17,785,000		20,744,000		17,640,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	3,216,365,000		3,353,553,000		3,498,272,000			3,216,365,000		3,498,272,000		3,353,553,000
Loans held for sale	19,018,000		30,077,000		22,951,000			19,018,000		22,951,000		30,077,000
Derivative assets	65,418,000		62,056,000		47,809,000			65,418,000		47,809,000		62,056,000
Derivative Asset, Fair Value, Gross Asset	65,418,000		62,056,000		47,809,000			65,418,000		47,809,000		62,056,000
Total assets at fair value on a recurring and nonrecurring basis	3,300,801,000	[1]	3,445,686,000	[2]	3,569,032,000	[3]		3,300,801,000	[1]	3,569,032,000	[3]	3,445,686,000	[2]
Derivative liabilities	84,602,000		86,106,000		72,037,000			84,602,000		72,037,000		86,106,000
Derivative Liability, Fair Value, Gross Liability	84,602,000		86,106,000		72,037,000			84,602,000		72,037,000		86,106,000
True-up liability	11,820,000		11,551,000		12,196,000			11,820,000		12,196,000		11,551,000
Total liabilities at fair value on a recurring basis	96,422,000	[1]	97,657,000	[2]	84,233,000	[3]		96,422,000	[1]	84,233,000	[3]	97,657,000	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Nonrecurring [Member]
Recurring Fair Value Measurements
Total assets at fair value on a recurring and nonrecurring basis	142,403,000		122,191,000		136,347,000			142,403,000		136,347,000		122,191,000
Nonrecurring Fair Value Measurement [Abstract]
Mortgage servicing rights	17,913,000	[4]	17,749,000	[5]	20,766,000	[6]		17,913,000	[4]	20,766,000	[6]	17,749,000	[5]
Impaired loans	62,094,000	[7]	56,739,000	[8]	72,289,000	[9]		62,094,000	[7]	72,289,000	[9]	56,739,000	[8]
Other property	10,839,000	[10]	4,087,000	[11]	8,916,000	[12]		10,839,000	[10]	8,916,000	[12]	4,087,000	[11]
Other real estate covered by loss share	51,557,000	[13]	43,616,000	[14]	34,376,000	[15]		51,557,000	[13]	34,376,000	[15]	43,616,000	[14]
Recorded Investment on Collateral Dependent Impaired Loans	73,362,000		64,456,000		86,462,000			73,362,000		86,462,000		64,456,000
Impaired Financing Receivable, Related Allowance	(11,268,000)		(7,717,000)		(14,173,000)			(11,268,000)		(14,173,000)		(7,717,000)
Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	3,340,000		3,299,000		3,752,000			3,340,000		3,752,000		3,299,000
Loans held for sale			0		0					0		0
Derivative assets	0		0		0			0		0		0
Total assets at fair value on a recurring and nonrecurring basis	3,340,000	[1]	3,299,000	[2]	3,752,000	[3]		3,340,000	[1]	3,752,000	[3]	3,299,000	[2]
Derivative liabilities	0		0		0			0		0		0
True-up liability	0		0		0			0		0		0
Total liabilities at fair value on a recurring basis	0	[1]	0	[2]	0	[3]		0	[1]	0	[3]	0	[2]
Level 1 [Member] | Nonrecurring [Member]
Recurring Fair Value Measurements
Total assets at fair value on a recurring and nonrecurring basis	0		0		0			0		0		0
Nonrecurring Fair Value Measurement [Abstract]
Mortgage servicing rights	0	[4]	0	[5]	0	[6]		0	[4]	0	[6]	0	[5]
Impaired loans	0	[7]	0	[8]	0	[9]		0	[7]	0	[9]	0	[8]
Other property	0	[10]	0	[11]	0	[12]		0	[10]	0	[12]	0	[11]
Other real estate covered by loss share	0	[13]	0	[14]	0	[15]		0	[13]	0	[15]	0	[14]
Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	3,164,929,000		3,262,715,000		3,349,950,000			3,164,929,000		3,349,950,000		3,262,715,000
Loans held for sale	19,018,000		30,077,000		22,951,000			19,018,000		22,951,000		30,077,000
Derivative assets	65,418,000		62,056,000		47,809,000			65,418,000		47,809,000		62,056,000
Derivative Asset, Fair Value, Gross Asset	65,418,000		62,056,000		47,809,000			65,418,000		47,809,000		62,056,000
Total assets at fair value on a recurring and nonrecurring basis	3,249,365,000	[1]	3,354,848,000	[2]	3,420,710,000	[3]		3,249,365,000	[1]	3,420,710,000	[3]	3,354,848,000	[2]
Derivative liabilities	84,602,000		86,106,000		72,037,000			84,602,000		72,037,000		86,106,000
Derivative Liability, Fair Value, Gross Liability	84,602,000		86,106,000		72,037,000			84,602,000		72,037,000		86,106,000
True-up liability	0		0		0			0		0		0
Total liabilities at fair value on a recurring basis	84,602,000	[1]	86,106,000	[2]	72,037,000	[3]		84,602,000	[1]	72,037,000	[3]	86,106,000	[2]
Level 2 [Member] | Nonrecurring [Member]
Recurring Fair Value Measurements
Total assets at fair value on a recurring and nonrecurring basis	0		0		0			0		0		0
Nonrecurring Fair Value Measurement [Abstract]
Mortgage servicing rights	0	[4]	0	[5]	0	[6]		0	[4]	0	[6]	0	[5]
Impaired loans	0	[7]	0	[8]	0	[9]		0	[7]	0	[9]	0	[8]
Other property	0	[10]	0	[11]	0	[12]		0	[10]	0	[12]	0	[11]
Other real estate covered by loss share	0	[13]	0	[14]	0	[15]		0	[13]	0	[15]	0	[14]
Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	48,096,000		87,539,000		144,570,000			48,096,000		144,570,000		87,539,000
Loans held for sale			0		0					0		0
Derivative assets	0		0		0			0		0		0
Total assets at fair value on a recurring and nonrecurring basis	48,096,000	[1]	87,539,000	[2]	144,570,000	[3]		48,096,000	[1]	144,570,000	[3]	87,539,000	[2]
Derivative liabilities	0		0		0			0		0		0
True-up liability	11,820,000		11,551,000		12,196,000			11,820,000		12,196,000		11,551,000
Total liabilities at fair value on a recurring basis	11,820,000	[1]	11,551,000	[2]	12,196,000	[3]		11,820,000	[1]	12,196,000	[3]	11,551,000	[2]
Level 3 [Member] | Nonrecurring [Member]
Recurring Fair Value Measurements
Total assets at fair value on a recurring and nonrecurring basis	142,403,000		122,191,000		136,347,000			142,403,000		136,347,000		122,191,000
Nonrecurring Fair Value Measurement [Abstract]
Mortgage servicing rights	17,913,000	[4]	17,749,000	[5]	20,766,000	[6]		17,913,000	[4]	20,766,000	[6]	17,749,000	[5]
Impaired loans	62,094,000	[7]	56,739,000	[8]	72,289,000	[9]		62,094,000	[7]	72,289,000	[9]	56,739,000	[8]
Other property	10,839,000	[10]	4,087,000	[11]	8,916,000	[12]		10,839,000	[10]	8,916,000	[12]	4,087,000	[11]
Other real estate covered by loss share	51,557,000	[13]	43,616,000	[14]	34,376,000	[15]		51,557,000	[13]	34,376,000	[15]	43,616,000	[14]
Not Designated as Hedging Instrument [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	65,418,000	[16]	62,101,000	[16]	47,809,000	[16]		65,418,000	[16]	47,809,000	[16]	62,101,000	[16]
Derivative Liability, Fair Value, Gross Liability	61,373,000	[17]	60,261,000	[17]	46,265,000	[17]		61,373,000	[17]	46,265,000	[17]	60,261,000	[17]
Interest Rate Swap [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Derivative liabilities	23,229,000		25,889,000		25,772,000			23,229,000		25,772,000		25,889,000
Interest Rate Swap [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Derivative liabilities	0		0		0			0		0		0
Interest Rate Swap [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Derivative liabilities			25,889,000		25,772,000					25,772,000		25,889,000
Interest Rate Swap [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Derivative liabilities	0		0		0			0		0		0
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	61,319,000	[16]	58,875,000	[16]	46,246,000	[16]		61,319,000	[16]	46,246,000	[16]	58,875,000	[16]
Derivative Liability, Fair Value, Gross Liability	61,319,000	[17]	58,875,000	[17]	46,246,000	[17]		61,319,000	[17]	46,246,000	[17]	58,875,000	[17]
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	61,319,000		58,875,000		46,246,000			61,319,000		46,246,000		58,875,000
Derivative liabilities	61,319,000		58,875,000		46,246,000			61,319,000		46,246,000		58,875,000
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Derivative liabilities	0		0		0			0		0		0
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets			58,875,000		46,246,000					46,246,000		58,875,000
Derivative Asset, Fair Value, Gross Asset	61,319,000							61,319,000
Derivative liabilities			58,875,000		46,246,000					46,246,000		58,875,000
Derivative Liability, Fair Value, Gross Liability	61,319,000							61,319,000
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Derivative liabilities	0		0		0			0		0		0
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	[16]	0	[16]	0	[16]		0	[16]	0	[16]	0	[16]
Derivative Liability, Fair Value, Gross Liability	23,229,000	[17]	25,889,000	[17]	25,772,000	[17]		23,229,000	[17]	25,772,000	[17]	25,889,000	[17]
Mortgage Loan Commitments [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	5,248,000	[16]						5,248,000	[16]
Mortgage Loan Commitments [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	5,248,000		4,959,000		1,539,000			5,248,000		1,539,000		4,959,000
Mortgage Loan Commitments [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Mortgage Loan Commitments [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets			4,959,000		1,539,000					1,539,000		4,959,000
Derivative Asset, Fair Value, Gross Asset	5,248,000							5,248,000
Mortgage Loan Commitments [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Mortgage Loan Commitments [Member] | Not Designated as Hedging Instrument [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset			4,959,000	[16]	1,539,000	[16]				1,539,000	[16]	4,959,000	[16]
Derivative Liability, Fair Value, Gross Liability	0	[17]	0	[17]	0	[17]		0	[17]	0	[17]	0	[17]
Forward Contracts [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	(1,201,000)	[16]						(1,201,000)	[16]
Forward Contracts [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	(1,201,000)		(1,798,000)		5,000			(1,201,000)		5,000		(1,798,000)
Forward Contracts [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Forward Contracts [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets			(1,798,000)		5,000					5,000		(1,798,000)
Derivative Asset, Fair Value, Gross Asset	(1,201,000)							(1,201,000)
Forward Contracts [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Forward Contracts [Member] | Not Designated as Hedging Instrument [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset			(1,798,000)	[16]	5,000	[16]				5,000	[16]	(1,798,000)	[16]
Derivative Liability, Fair Value, Gross Liability	0	[17]	0	[17]	0	[17]		0	[17]	0	[17]	0	[17]
Foreign Exchange [Member]
Recurring Fair Value Measurements
Derivative Liability, Fair Value, Gross Liability	54,000	[17]						54,000	[17]
Foreign Exchange [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	52,000		20,000		19,000			52,000		19,000		20,000
Derivative liabilities	54,000		18,000		19,000			54,000		19,000		18,000
Foreign Exchange [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Derivative liabilities	0		0		0			0		0		0
Foreign Exchange [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets			20,000		19,000					19,000		20,000
Derivative Asset, Fair Value, Gross Asset	52,000							52,000
Derivative liabilities			18,000		19,000					19,000		18,000
Derivative Liability, Fair Value, Gross Liability	54,000							54,000
Foreign Exchange [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative assets	0		0		0			0		0		0
Derivative liabilities	0		0		0			0		0		0
Foreign Exchange [Member] | Not Designated as Hedging Instrument [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	52,000	[16]	65,000	[16]	19,000	[16]		52,000	[16]	19,000	[16]	65,000	[16]
Derivative Liability, Fair Value, Gross Liability			62,000	[17]	19,000	[17]				19,000	[17]	62,000	[17]
Other Contract [Member]
Recurring Fair Value Measurements
Derivative Liability, Fair Value, Gross Liability	0	[17]						0	[17]
Other Contract [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative liabilities			1,324,000		0					0		1,324,000
Other Contract [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative liabilities			0		0					0		0
Other Contract [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative liabilities			1,324,000		0					0		1,324,000
Other Contract [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Derivative liabilities			0		0					0		0
Other Contract [Member] | Not Designated as Hedging Instrument [Member]
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	[16]	0	[16]	0	[16]		0	[16]	0	[16]	0	[16]
Derivative Liability, Fair Value, Gross Liability			1,324,000	[17]	0	[17]				0	[17]	1,324,000	[17]
Money Market Funds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	3,340,000		3,299,000		3,752,000			3,340,000		3,752,000		3,299,000
Money Market Funds [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	3,340,000		3,299,000		3,752,000			3,340,000		3,752,000		3,299,000
Money Market Funds [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Money Market Funds [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
US Government Agency Debentures [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	35,297,000		123,069,000		371,244,000			35,297,000		371,244,000		123,069,000
US Government Agency Debentures [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
US Government Agency Debentures [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	35,297,000		123,069,000		371,244,000			35,297,000		371,244,000		123,069,000
US Government Agency Debentures [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
US States and Political Subdivisions Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	265,124,000		357,731,000		309,785,000			265,124,000		309,785,000		357,731,000
US States and Political Subdivisions Debt Securities [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
US States and Political Subdivisions Debt Securities [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	265,124,000		357,731,000		309,785,000			265,124,000		309,785,000		357,731,000
US States and Political Subdivisions Debt Securities [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	1,382,813,000		1,460,343,000		1,588,971,000			1,382,813,000		1,588,971,000		1,460,343,000
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	1,382,813,000		1,460,343,000		1,588,971,000			1,382,813,000		1,588,971,000		1,460,343,000
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	38,428,000							38,428,000
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0							0
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	38,428,000							38,428,000
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0							0
Residential Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	1,277,378,000		1,137,835,000		1,079,950,000			1,277,378,000		1,079,950,000		1,137,835,000
Residential Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Residential Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	1,277,378,000		1,137,835,000		1,079,947,000			1,277,378,000		1,079,947,000		1,137,835,000
Residential Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		3,000			0		3,000		0
Residential Collateralized Mortgage Backed Securities Issued by Non Agency [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	13,000		43,307,000		93,847,000			13,000		93,847,000		43,307,000
Residential Collateralized Mortgage Backed Securities Issued by Non Agency [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Residential Collateralized Mortgage Backed Securities Issued by Non Agency [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	2,000		2,000		3,000			2,000		3,000		2,000
Residential Collateralized Mortgage Backed Securities Issued by Non Agency [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	11,000		43,305,000		93,844,000			11,000		93,844,000		43,305,000
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	68,545,000		129,127,000		0			68,545,000		0		129,127,000
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	68,545,000		129,127,000		0			68,545,000		0		129,127,000
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Corporate Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	145,427,000		98,842,000		50,723,000			145,427,000		50,723,000		98,842,000
Corporate Debt Securities [Member] | Level 1 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	0		0		0			0		0		0
Corporate Debt Securities [Member] | Level 2 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	97,342,000		54,608,000		0			97,342,000		0		54,608,000
Corporate Debt Securities [Member] | Level 3 [Member] | Recurring [Member]
Recurring Fair Value Measurements
Available for sale securities	$ 48,085,000		$ 44,234,000		$ 50,723,000			$ 48,085,000		$ 50,723,000		$ 44,234,000

[1] There were no transfers between levels 1 and 2 of the fair value hierarchy during the quarter ended June 30, 2012.

[2] There were no transfers between levels 1 and 2 of the fair value hierarchy during the quarter ended December 31, 2011.

[3] There were no transfers between levels 1 and 2 of the fair value hierarchy during the quarter ended June 30, 2011.

[4] Mortgage servicing rights with a recorded investment of $21.3 million were reduced by a specific valuation allowance totaling $3.5 million to a reported carrying value of $17.8 million resulting in recognition of $1.3 million in expense included in loans sales and servicing income in the quarter ended June 30, 2012.

[5] Mortgage servicing rights with a recorded investment of $21.2 million were reduced by a specific valuation allowance totaling $3.5 million to a reported carrying value of $17.6 million resulting in the recognition of an impairment charge of $3.5 million in the year ended December 31, 2011.

[6] Recorded at carrying value of $20.7 million as of June 30, 2011.

[7] Collateral dependent impaired loans with a recorded investment of $73.4 million were reduced by specific valuation allowance allocations totaling $11.3 million to a reported net carrying value of $62.1 million.

[8] Collateral dependent impaired loans with a recorded investment of $64.5 million were reduced by specific valuation allowance allocations totaling $7.7 million to a reported net carrying value of $56.7 million.

[9] Collateral dependent impaired loans with a recorded investment of $86.5 million were reduced by specific valuation allowance allocations totaling $14.2 million to a reported net carrying value of $72.3 million.

[10] Amounts do not include assets held at cost at June 30, 2012. During the quarter ended June 30, 2012, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.4 million included in noninterest expense.

[11] Amounts do not include assets held at cost at December 31, 2011. During the year ended December 31, 2011, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $5.4 million included in noninterest expense.

[12] Amounts do not include assets held at cost at June 30, 2011. During the quarter ended June 30, 2011, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.9 million included in noninterest expense.

[13] Amounts do not include assets held at cost at June 30, 2012. During the quarter ended June 30, 2012, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses $0.7 million included in noninterest expense.

[14] Amounts do not include assets held at cost at December 31, 2011. During the year ended December 31, 2011, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $3.0 million included in noninterest expense.

[15] Amounts do not include assets held at cost at June 30, 2011. During the quarter ended June 30, 2011, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.7 million included in noninterest expense.

[16] Included in Other Assets on the Consolidated Balance Sheets

[17] Included in Other Liabilities on the Consolidated Balance Sheets