Revenue Recognition - Schedule of Sources of Non-interest Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Non-interest income
Returned item and overdraft fees		$ 1,766	$ 1,676	$ 4,990	$ 4,818
Other service charges on deposits		1,526	1,532	4,396	4,363
Debit card interchange income		1,698	1,478	4,897	4,363
Loss on limited partnerships	[1]	(728)	(431)	(1,628)	(1,242)
Dividends on equity investments	[1]	188	227	594	621
Unrealized gains recognized on equity investments	[1]			232
Net gains on sale of securities	[1]		1	29	2
Other	[1]	1,419	1,240	4,121	3,360
Total non-interest income		$ 5,869	$ 5,723	$ 17,631	$ 16,285

[1] Not within scope of ASC 606. Revenue streams are not related to contract with customers and are accounted for on an accrual basis under other provisions of GAAP