Loans and Leases - Reserve for Loan and Lease Losses Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 17,628	$ 20,662
Charge-offs	(2,072)	(1,093)
Recoveries	570	291
Provision (recovery of provision)	327	1,074
Provision for acquired credit impaired loans	(1)
Ending balance	16,452	20,934
Commercial, Financial and Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,418	6,920
Charge-offs	(1,481)	(300)
Recoveries	450	110
Provision (recovery of provision)	243	(18)
Provision for acquired credit impaired loans	0
Ending balance	5,630	6,712
Real Estate-Commercial and Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,572	8,943
Charge-offs	(26)	(348)
Recoveries	7	65
Provision (recovery of provision)	(82)	988
Provision for acquired credit impaired loans	0
Ending balance	6,471	9,648
Real Estate-Residential Secured for Business Purpose [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	763	763
Charge-offs	(238)	0
Recoveries	19	6
Provision (recovery of provision)	203	(101)
Provision for acquired credit impaired loans	0
Ending balance	747	668
Real Estate-Residential and Home Equity Secured for Personal Purpose [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,575	1,124
Charge-offs	(46)	(31)
Recoveries	17	1
Provision (recovery of provision)	(233)	34
Provision for acquired credit impaired loans	(1)
Ending balance	1,312	1,128
Loans to Individuals [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	346	360
Charge-offs	(76)	(184)
Recoveries	33	48
Provision (recovery of provision)	53	141
Provision for acquired credit impaired loans	0
Ending balance	356	365
Lease Financings [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,042	985
Charge-offs	(205)	(230)
Recoveries	44	61
Provision (recovery of provision)	41	197
Provision for acquired credit impaired loans	0
Ending balance	922	1,013
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	912	1,567
Provision (recovery of provision)	102	(167)
Provision for acquired credit impaired loans	0
Ending balance	$ 1,014	$ 1,400

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

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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 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

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 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 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section L
-Subsection 1

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Amount of expense related to estimated loass from loan and lease transactions on acquired loans.

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Amount of expense related to estimated loss from loan and lease transactions on originated loans.

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