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Allowance for Loan and Lease Losses (Details 2) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 4,422,513 | $ 4,261,979
Commercial and industrial, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,128,042 | 1,044,619
Commercial real estate, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,948,217 | 1,920,841
Residential real estate, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,270,065 | 1,219,815
Consumer and other, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 60,258 | 60,054
Finance Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 15,931 | 16,650
Originated Loans and Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 11,806 | 12,954
Collectively evaluated for impairment | 4,062,866 | 3,854,914
Total | 4,074,672 | 3,867,868
Originated Loans and Leases | Commercial and industrial, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 1,583 | 635
Collectively evaluated for impairment | 1,065,325 | 964,667
Total | 1,066,908 | 965,302
Originated Loans and Leases | Commercial real estate, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 6,523 | 8,812
Collectively evaluated for impairment | 1,713,139 | 1,661,221
Total | 1,719,662 | 1,670,033
Originated Loans and Leases | Residential real estate, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 3,700 | 3,507
Collectively evaluated for impairment | 1,209,109 | 1,153,148
Total | 1,212,809 | 1,156,655
Originated Loans and Leases | Consumer and other, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 59,362 | 59,228
Total | 59,362 | 59,228
Originated Loans and Leases | Finance Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 15,931 | 16,650
Total | 15,931 | 16,650
Total Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 3,070 | 5,625
Loans acquired with deteriorated credit quality | 16,597 | 22,517
Collectively evaluated for impairment | 328,174 | 365,969
Total | 347,841 | 394,111
Total Acquired Loans | Commercial and industrial, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 102 | 172
Loans acquired with deteriorated credit quality | 228 | 448
Collectively evaluated for impairment | 60,804 | 78,697
Total | 61,134 | 79,317
Total Acquired Loans | Commercial real estate, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 1,454 | 4,081
Loans acquired with deteriorated credit quality | 9,450 | 14,368
Collectively evaluated for impairment | 217,651 | 232,359
Total | 228,555 | 250,808
Total Acquired Loans | Residential real estate, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 1,514 | 1,372
Loans acquired with deteriorated credit quality | 6,919 | 7,701
Collectively evaluated for impairment | 48,823 | 54,087
Total | 57,256 | 63,160
Total Acquired Loans | Consumer and other, total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 0 | 0
Loans acquired with deteriorated credit quality | 0 | 0
Collectively evaluated for impairment | 896 | 826
Total | 896 | 826
Total Acquired Loans | Finance Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Total Acquired Loans | Covered Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Individually evaluated for impairment | 0 | 0
Loans acquired with deteriorated credit quality | 0 | 0
Collectively evaluated for impairment | 0 | 0
Total | $ 0 | $ 0

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- Definition The balance of financing receivables that were collectively 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=66008989&loc=SL6953423-111524 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes 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 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522 + Details
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