Covered Assets and Indemnification Asset (Allowance And Recorded Investment By Covered Loan Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012	Mar. 31, 2012		Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Acquired with Deteriorated Credit Quality	$ 17,399	[1]		$ 11,463	[1]
Collectively evaluated for impairment	822	[2]		1,172	[2]
Total	18,221		18,275	12,635		14,320
Covered loans and leases, Loans acquired with deteriorated credit quality	444,728	[1]		578,346	[1]
Financing Receivable Covered Collectively Evaluated For Impairment	23,353	[2]		27,468	[2]
Total	468,081		495,353	605,814
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Acquired with Deteriorated Credit Quality	11,985	[1]		7,765	[1]
Collectively evaluated for impairment	389	[2]		533	[2]
Total	12,374		12,129	8,298		8,939
Covered loans and leases, Loans acquired with deteriorated credit quality	375,531	[1]		485,058	[1]
Financing Receivable Covered Collectively Evaluated For Impairment	2,940	[2]		2,801	[2]
Total	378,471			487,859
Term & Multifamily [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	358,677		378,009
Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	10,409		11,711
Residential Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	9,385		9,794
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Acquired with Deteriorated Credit Quality	4,529	[1]		2,717	[1]
Collectively evaluated for impairment	338	[2]		558	[2]
Total	4,867		4,980	3,275		3,964
Covered loans and leases, Loans acquired with deteriorated credit quality	23,080	[1]		34,311	[1]
Financing Receivable Covered Collectively Evaluated For Impairment	12,942	[2]		17,480	[2]
Total	36,022			51,791
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	21,340		23,524
LOC & Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	14,682		14,997
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Acquired with Deteriorated Credit Quality	636	[1]		700	[1]
Collectively evaluated for impairment	49	[2]		40	[2]
Total	685		804	740		991
Covered loans and leases, Loans acquired with deteriorated credit quality	43,338	[1]		54,305	[1]
Financing Receivable Covered Collectively Evaluated For Impairment	4,966	[2]		4,647	[2]
Total	48,304			58,952
Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	25,946		27,825
Home Equity Loans & Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	22,358		23,442
Consumer & Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Acquired with Deteriorated Credit Quality	249	[1]		281	[1]
Collectively evaluated for impairment	46	[2]		41	[2]
Total	295		362	322		426
Covered loans and leases, Loans acquired with deteriorated credit quality	2,779	[1]		4,672	[1]
Financing Receivable Covered Collectively Evaluated For Impairment	2,505	[2]		2,540	[2]
Total	$ 5,284		$ 6,051	$ 7,212

[1] In accordance with ASC 310-30, the valuation allowance is netted against the carrying value of the covered loan and lease balance.

[2] The allowance on covered loan and lease losses includes an allowance on covered loan advances on acquired loans subsequent to acquisition.