Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

+ References+ Details

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph a(ii)

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 114

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section L

-Subsection 1

+ Details

- Definition

The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.

+ References+ Details

Loans and Allowance - Changes in Allowance for Loan Losses by Loan Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for loan losses:
Beginning balance				$ 70,898				$ 82,977	$ 70,898	$ 82,977	$ 92,131
Provision for losses	4,505	4,609	4,545	4,875	5,855	5,556	5,625	5,594	18,534	22,630	46,483
Recoveries on loans									7,206	13,764	11,935
Loans charged off									(27,272)	(48,473)	(67,572)
Ending balance	69,366				70,898				69,366	70,898	82,977
Commercial
Allowance for loan losses:
Beginning balance				17,731				32,508	17,731	32,508	48,770
Provision for losses									14,749	(13,787)	(180)
Recoveries on loans									1,744	8,828	6,750
Loans charged off									(8,311)	(9,818)	(22,832)
Ending balance	25,913				17,731				25,913	17,731	32,508
Real Estate Commercial
Allowance for loan losses:
Beginning balance				37,919				36,341	37,919	36,341	30,189
Provision for losses									(2,546)	28,574	37,555
Recoveries on loans									3,652	2,811	1,420
Loans charged off									(12,322)	(29,807)	(32,823)
Ending balance	26,703				37,919				26,703	37,919	36,341
Consumer
Allowance for loan losses:
Beginning balance				2,902				3,622	2,902	3,622	2,242
Provision for losses									126	(221)	2,868
Recoveries on loans									695	942	938
Loans charged off									(1,130)	(1,441)	(2,426)
Ending balance	2,593				2,902				2,593	2,902	3,622
Residential
Allowance for loan losses:
Beginning balance				12,343				10,408	12,343	10,408	10,751
Provision for losses									6,176	8,166	6,267
Recoveries on loans									1,113	1,176	2,827
Loans charged off									(5,475)	(7,407)	(9,437)
Ending balance	14,157				12,343				14,157	12,343	10,408
Finance Leases
Allowance for loan losses:
Beginning balance				3				98	3	98	179
Provision for losses									29	(102)	(27)
Recoveries on loans									2	7
Loans charged off									(34)		(54)
Ending balance					$ 3					$ 3	$ 98