Loans - Changes in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Changes in the Allowance for Loan Losses
Balance, beginning of period	$ 19,397	$ 19,921	$ 19,089	$ 18,926
Charge-offs	(111)	(160)	(2,179)	(300)
Recoveries	347	26	2,448	409
Net (charge-offs) recoveries	236	(134)	269	109
Provision for loan losses	115	245	390	997
Balance, end of period	19,748	20,032	19,748	20,032
Commercial
Changes in the Allowance for Loan Losses
Balance, beginning of period	11,259	11,528	10,656	10,748
Charge-offs	(111)	(160)	(2,179)	(300)
Recoveries	281	21	1,453	182
Net (charge-offs) recoveries	170	(139)	(726)	(118)
Provision for loan losses	(441)	792	1,058	1,551
Balance, end of period	10,988	12,181	10,988	12,181
Real estate
Changes in the Allowance for Loan Losses
Balance, beginning of period	7,982	8,277	8,327	8,076
Recoveries	66	5	995	227
Net (charge-offs) recoveries	66	5	995	227
Provision for loan losses	592	(519)	(682)	(540)
Balance, end of period	8,640	7,763	8,640	7,763
Consumer
Changes in the Allowance for Loan Losses
Balance, beginning of period	156	116	106	102
Provision for loan losses	(36)	(28)	14	(14)
Balance, end of period	$ 120	$ 88	$ 120	$ 88

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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- Definition

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

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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- Definition

Amount, after recoveries, of loans and leases that have been written-off.

+ References

No definition available.

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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

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- Definition

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

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