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Allowance for Loan and Lease Losses (Allocation of Allowance for Loan and Lease Losses) (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | $ 222,942,000 |  | $ 233,394,000
Originated Loans |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 133,101,000 |  | 145,485,000
ALLL for loans and leases individually evaluated for impairment | 9,495,000 |  | 10,161,000
Financing Receivable, Individually Evaluated for Impairment | 123,067,000 |  | 132,146,000
Average balance | 131,647,000 | 161,014,000 |
Interest income recognized | 1,513,000 | 2,123,000 |
Originated Loans | Commercial | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 3,294,000 |  | 7,306,000
ALLL for loans and leases individually evaluated for impairment | 144,000 |  | 103,000
Financing Receivable, Individually Evaluated for Impairment | 2,329,000 |  | 2,272,000
Average balance | 1,031,000 | 9,284,000 |
Interest income recognized | 15,000 | 112,000 |
Originated Loans | Commercial | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 94,950,000 |  | 103,522,000
ALLL for loans and leases individually evaluated for impairment | 6,400,000 |  | 6,873,000
Financing Receivable, Individually Evaluated for Impairment | 88,987,000 |  | 97,111,000
Average balance | 94,547,000 | 103,848,000 |
Interest income recognized | 1,120,000 | 1,425,000 |
Originated Loans | Commercial | Other commercial real estate |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 2,027,000 |  | 2,279,000
ALLL for loans and leases individually evaluated for impairment | 203,000 |  | 209,000
Financing Receivable, Individually Evaluated for Impairment | 1,627,000 |  | 1,878,000
Average balance | 1,796,000 | 3,179,000 |
Interest income recognized | 21,000 | 45,000 |
Originated Loans | Commercial | Commercial and industrial |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 10,055,000 |  | 10,393,000
ALLL for loans and leases individually evaluated for impairment | 769,000 |  | 771,000
Financing Receivable, Individually Evaluated for Impairment | 8,804,000 |  | 9,300,000
Average balance | 10,234,000 | 18,997,000 |
Interest income recognized | 118,000 | 266,000 |
Originated Loans | Commercial | Lease financing |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 393,000 |  | 188,000
ALLL for loans and leases individually evaluated for impairment | 13,000 |  | 54,000
Financing Receivable, Individually Evaluated for Impairment | 393,000 |  | 188,000
Average balance | 284,000 | 355,000 |
Interest income recognized | 4,000 | 6,000 |
Originated Loans | Commercial | Other |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
ALLL for loans and leases individually evaluated for impairment | 0 |  | 0
Financing Receivable, Individually Evaluated for Impairment | 0 |  | 0
Originated Loans | Noncommerical | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 16,026,000 |  | 15,939,000
ALLL for loans and leases individually evaluated for impairment | 1,418,000 |  | 1,586,000
Financing Receivable, Individually Evaluated for Impairment | 15,626,000 |  | 15,539,000
Average balance | 16,482,000 | 17,330,000 |
Interest income recognized | 174,000 | 228,000 |
Originated Loans | Noncommerical | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 699,000 |  | 1,108,000
ALLL for loans and leases individually evaluated for impairment | 77,000 |  | 72,000
Financing Receivable, Individually Evaluated for Impairment | 699,000 |  | 1,108,000
Average balance | 2,322,000 | 866,000 |
Interest income recognized | 29,000 | 11,000 |
Originated Loans | Noncommerical | Revolving mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 4,618,000 |  | 3,596,000
ALLL for loans and leases individually evaluated for impairment | 353,000 |  | 372,000
Financing Receivable, Individually Evaluated for Impairment | 3,587,000 |  | 3,596,000
Average balance | 3,892,000 | 5,472,000 |
Interest income recognized | 27,000 | 25,000 |
Originated Loans | Noncommerical | Consumer |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 1,039,000 |  | 1,154,000
ALLL for loans and leases individually evaluated for impairment | 118,000 |  | 121,000
Financing Receivable, Individually Evaluated for Impairment | 1,015,000 |  | 1,154,000
Average balance | 1,059,000 | 1,683,000 |
Interest income recognized | 5,000 | 5,000 |
Originated Loans | With A Recorded Allowance |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total impaired noncovered loans and leases | 82,285,000 |  | 83,678,000
Originated Loans | With A Recorded Allowance | Commercial | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 1,646,000 |  | 1,025,000
Originated Loans | With A Recorded Allowance | Commercial | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 57,568,000 |  | 57,819,000
Originated Loans | With A Recorded Allowance | Commercial | Other commercial real estate |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 755,000 |  | 783,000
Originated Loans | With A Recorded Allowance | Commercial | Commercial and industrial |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 6,530,000 |  | 7,197,000
Originated Loans | With A Recorded Allowance | Commercial | Lease financing |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 238,000 |  | 133,000
Originated Loans | With A Recorded Allowance | Noncommerical | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 10,624,000 |  | 11,534,000
Originated Loans | With A Recorded Allowance | Noncommerical | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 699,000 |  | 651,000
Originated Loans | With A Recorded Allowance | Noncommerical | Revolving mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 3,210,000 |  | 3,382,000
Originated Loans | With A Recorded Allowance | Noncommerical | Consumer |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 1,015,000 |  | 1,154,000
Originated Loans | With No Recorded Allowance |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 40,782,000 |  | 48,468,000
Originated Loans | With No Recorded Allowance | Commercial | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 683,000 |  | 1,247,000
Originated Loans | With No Recorded Allowance | Commercial | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 31,419,000 |  | 39,292,000
Originated Loans | With No Recorded Allowance | Commercial | Other commercial real estate |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 872,000 |  | 1,095,000
Originated Loans | With No Recorded Allowance | Commercial | Commercial and industrial |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 2,274,000 |  | 2,103,000
Originated Loans | With No Recorded Allowance | Commercial | Lease financing |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 155,000 |  | 55,000
Originated Loans | With No Recorded Allowance | Noncommerical | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 5,002,000 |  | 4,005,000
Originated Loans | With No Recorded Allowance | Noncommerical | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 0 |  | 457,000
Originated Loans | With No Recorded Allowance | Noncommerical | Revolving mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 377,000 |  | 214,000
Originated Loans | With No Recorded Allowance | Noncommerical | Consumer |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan and lease losses | 0 |  | 0
Acquired Loans |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Acquired loans which have adverse change in expected cash flows | $ 382,600,000 |  | $ 459,900,000

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 + Details
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- Definition 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 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 2: 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 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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