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Loans - Change in the Balances of the ALLL (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Allowance for loan losses:
Balance, beginning of period	$ 16,053	$ 13,194	$ 14,970	$ 10,981
Provision (credit) charged to expense	888	1,336	2,405	3,693
Losses charged off	(336)	532	(896)	925
Recoveries	99	89	225	338
Balance, end of period	16,704	14,087	16,704	14,087
Commercial and industrial
Allowance for loan losses:
Balance, beginning of period	1,364	1,525	1,738	1,352
Provision (credit) charged to expense	(51)	361	(428)	465
Losses charged off	(6)	205	(6)	205
Recoveries	0	0	3	69
Balance, end of period	1,307	1,681	1,307	1,681
Owner-occupied commercial real estate
Allowance for loan losses:
Balance, beginning of period	889	716	803	582
Provision (credit) charged to expense	69	89	155	223
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	958	805	958	805
Investor commercial real estate
Allowance for loan losses:
Balance, beginning of period	67	109	85	168
Provision (credit) charged to expense	(5)	(22)	(23)	(81)
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	62	87	62	87
Construction
Allowance for loan losses:
Balance, beginning of period	295	395	423	544
Provision (credit) charged to expense	(54)	38	(182)	(111)
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	241	433	241	433
Single tenant lease financing
Allowance for loan losses:
Balance, beginning of period	8,294	7,403	7,872	6,248
Provision (credit) charged to expense	186	281	608	1,436
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	8,480	7,684	8,480	7,684
Public finance
Allowance for loan losses:
Balance, beginning of period	1,372	362	959	0
Provision (credit) charged to expense	82	201	495	563
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	1,454	563	1,454	563
Healthcare finance
Allowance for loan losses:
Balance, beginning of period	676	28	313	0
Provision (credit) charged to expense	249	95	612	123
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	925	123	925	123
Residential mortgage
Allowance for loan losses:
Balance, beginning of period	909	991	956	754
Provision (credit) charged to expense	68	81	27	316
Losses charged off	0	116	(9)	116
Recoveries	1	2	4	4
Balance, end of period	978	958	978	958
Home equity
Allowance for loan losses:
Balance, beginning of period	54	80	70	102
Provision (credit) charged to expense	(5)	(6)	(28)	(48)
Losses charged off	0	0	0	0
Recoveries	5	1	12	21
Balance, end of period	54	75	54	75
Other consumer
Allowance for loan losses:
Balance, beginning of period	2,133	1,585	1,751	1,231
Provision (credit) charged to expense	349	218	1,169	807
Losses charged off	(330)	211	(881)	604
Recoveries	93	86	206	244
Balance, end of period	$ 2,245	$ 1,678	$ 2,245	$ 1,678

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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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.

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