Revenue Recognition - Schedule of Sources of Non-interest Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Non-interest income
Returned item and overdraft fees		$ 1,567	$ 1,567
Other service charges on deposits		1,376	1,379
Debit card interchange income		1,512	1,399
Loss on limited partnerships	[1]	(450)	(405)
Dividends on equity investments	[1]	231	225
Net gains on sale of securities	[1]	6	0
Other	[1]	1,664	968
Total non-interest income		$ 5,906	$ 5,133

[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.