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Investments - Textual (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) security	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) security	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Schedule of Available-for-sale Securities
Available-for-sale Securities pledged as collateral | $	$ 72,924,000		$ 72,924,000
Unrealized gain (loss) of available-for sale securities | $	6,740,000		6,740,000		$ (6,257,000)
AOCI available-for-sale securities adjustment tax | $	1,993,000		1,993,000		(1,850,000)
Income tax impact from the reclassification of unrealized net gains on available-for-sale securities to realized net gains on available-for-sale securities | $	727,000	$ 24,000	$ 1,038,000	$ 265,000
Threshold period of value decline in available-for-sale securities to be considered other than temporary impairment			12 months
Threshold percentage of value decline in available-for-sale securities to be considered other than temporary impairment			10.00%
Threshold amount of value decline in available-for-sale securities to be considered other than temporary impairment | $			$ 10,000
Other than temporary impairment losses on investment securities | $			0	$ 0
Debt securities, amortized cost | $	$ 469,471,000		$ 469,471,000
U.S. Government agencies
Schedule of Available-for-sale Securities
Available-for-sale securities, number of positions	6		6
Debt securities, amortized cost | $	$ 18,167,000		$ 18,167,000		21,723,000
U.S. Government agencies | Less than 12 months
Schedule of Available-for-sale Securities
Available-for-sale securities in unrealized loss positions, number of positions	0		0
U.S. Government agencies | Greater than 12 months
Schedule of Available-for-sale Securities
Available-for-sale securities in unrealized loss positions, number of positions	5		5
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities
Available-for-sale securities, number of positions	28		28
Debt securities, amortized cost | $	$ 26,577,000		$ 26,577,000		79,886,000
Obligations of states and political subdivisions | Less than 12 months
Schedule of Available-for-sale Securities
Available-for-sale securities in unrealized loss positions, number of positions	0		0
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations
Schedule of Available-for-sale Securities
Available-for-sale securities, number of positions	126		126
Debt securities, amortized cost | $	$ 225,045,000		$ 225,045,000		239,388,000
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations | Less than 12 months
Schedule of Available-for-sale Securities
Available-for-sale securities in unrealized loss positions, number of positions	21		21
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations | Greater than 12 months
Schedule of Available-for-sale Securities
Available-for-sale securities in unrealized loss positions, number of positions	17		17
Private label mortgage and asset backed securities
Schedule of Available-for-sale Securities
Available-for-sale securities, number of positions	47		47
Debt securities, amortized cost | $	$ 190,682,000		$ 190,682,000		$ 129,165,000
Private label mortgage and asset backed securities | Less than 12 months
Schedule of Available-for-sale Securities
Available-for-sale securities in unrealized loss positions, number of positions	4		4
Private label mortgage and asset backed securities | Greater than 12 months
Schedule of Available-for-sale Securities
Available-for-sale securities in unrealized loss positions, number of positions	1		1
Corporate debt securities
Schedule of Available-for-sale Securities
Available-for-sale securities, number of positions	2		2
Available-for-sale securities in unrealized loss positions, number of positions	0		0
Debt securities, amortized cost | $	$ 9,000,000		$ 9,000,000

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