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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Narrative Disclosures) (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) loans | Mar. 31, 2017 USD ($) loans | Dec. 31, 2017 USD ($)
Financing Receivable, Recorded Investment |  |  |
SBA loans in the participation sold portfolio, considered impaired | $ 8,000,000 |  | $ 11,100,000
Guaranteed portion of SBA loans sold to third parties | 3,100,000 | $ 3,300,000 |
Total amount of outstanding SBA loans sold | 97,700,000 |  | 100,300,000
Loans and leases transferred to third parties total principal amount | 19,700,000 | 12,000,000 |
Gain (Loss) Recognized on Participation Interest in Originated Loans | 0 | $ 0 |
Total amount of outstanding loans transferred to third parties as loan participations | 108,700,000 |  | 106,400,000
Total amount of loan participations remaining on the Corporations balance sheet | 187,800,000 |  | 181,700,000
Loans in the participation sold portfolio, considered impaired | 0 |  | 0
Loan participations purchased on the Corporation's balance sheet | 650,000 |  | 650,000
Total gross loans and leases receivable | 1,565,161,000 |  | 1,503,038,000
Non-accrual troubled debt restructurings | 8,600,000 |  | 8,800,000
Unfunded commitments, troubled debt restructurings | $ 0 |  |
Financing Receivable, Modifications, Number of Contracts | loans | 0 | 0 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 0 | 3 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  | $ 878,000 |
Loans and leases receivable, difference between recorded investment and unpaid principal balance | $ 10,400,000 |  | 6,600,000
Performing troubled debt restructurings | 261,000 |  | 332,000
Substandard |  |  |
Financing Receivable, Recorded Investment |  |  |
Total gross loans and leases receivable | 30,600,000 |  | 32,700,000
Special Mention |  |  |
Financing Receivable, Recorded Investment |  |  |
Total gross loans and leases receivable | 0 |  | 0
Doubtful |  |  |
Financing Receivable, Recorded Investment |  |  |
Total gross loans and leases receivable | 0 |  | 4,692,000
Loss |  |  |
Financing Receivable, Recorded Investment |  |  |
Total gross loans and leases receivable | 0 |  | 0
Consumer and other: |  |  |
Financing Receivable, Recorded Investment |  |  |
Total gross loans and leases receivable | 28,987,000 |  | 25,361,000
Commercial and industrial |  |  |
Financing Receivable, Recorded Investment |  |  |
Total gross loans and leases receivable | $ 443,005,000 |  | $ 429,002,000

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