Allowance for Loan and Lease Losses - Schedule of Detail in Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			$ 43,410
Provision (credit)	$ 1,320	$ 272	2,366	$ 1,884
Ending Balance	41,371		41,371
Allowance for originated loans and leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	40,689	41,111	43,321	39,686
Charge-offs	(782)	(344)	(5,059)	(1,658)
Recoveries	79	314	654	1,410
Provision (credit)	1,245	208	2,315	1,851
Ending Balance	41,231	41,289	41,231	41,289
Total Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	101	114	89	85
Charge-offs	(52)	(168)	(81)	(272)
Recoveries	16	59	81	223
Provision (credit)	75	64	51	33
Ending Balance	140	69	140	69
Commercial and Industrial \| Allowance for originated loans and leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,543	12,866	11,217	11,812
Charge-offs	(2)	(118)	(482)	(224)
Recoveries	10	8	59	16
Provision (credit)	(292)	(335)	465	817
Ending Balance	11,259	12,421	11,259	12,421
Commercial and Industrial \| Total Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	19	55	25
Charge-offs	(4)	(42)	(7)	(43)
Recoveries	0	32	33	88
Provision (credit)	36	(9)	(49)	(70)
Ending Balance	32	0	32	0
Commercial Real Estate \| Allowance for originated loans and leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	20,954	20,770	23,483	20,412
Charge-offs	(551)	0	(3,949)	(60)
Recoveries	2	203	97	549
Provision (credit)	2,137	199	2,911	271
Ending Balance	22,542	21,172	22,542	21,172
Commercial Real Estate \| Total Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	51	25	0	0
Charge-offs	0	(81)	0	(81)
Recoveries	0	4	10	27
Provision (credit)	6	52	47	54
Ending Balance	57	0	57	0
Residential Real Estate \| Allowance for originated loans and leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,853	6,147	7,317	6,161
Charge-offs	(39)	(2)	(60)	(208)
Recoveries	2	96	284	232
Provision (credit)	(769)	204	(1,494)	260
Ending Balance	6,047	6,445	6,047	6,445
Residential Real Estate \| Total Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	44	65	28	54
Charge-offs	(48)	(45)	(71)	(148)
Recoveries	13	23	35	106
Provision (credit)	36	21	53	52
Ending Balance	45	64	45	64
Consumer and Other \| Allowance for originated loans and leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,339	1,328	1,304	1,301
Charge-offs	(190)	(224)	(568)	(1,166)
Recoveries	65	7	214	613
Provision (credit)	169	140	433	503
Ending Balance	1,383	1,251	1,383	1,251
Consumer and Other \| Total Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6	5	6	6
Charge-offs	0	0	(3)	0
Recoveries	3	0	3	2
Provision (credit)	(3)	0	0	(3)
Ending Balance	6	5	6	5
Finance Leases \| Allowance for originated loans and leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (credit)	0	0		0
Ending Balance	0	0	0	0
Finance Leases \| Total Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (credit)	0	0	0	0
Ending Balance	$ 0	$ 0	$ 0	$ 0

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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- Definition

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

+ References

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-Publisher FASB
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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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