Derivatives - Additional Information (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Jul. 31, 2017 USD ($) InterestRateSwap	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($) InterestRateSwap	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Lock in period for interest rates		45 days
Long-term debt		$ 143,533		$ 44,892
Notional amount	$ 100,000
Interest rate swap maturity date		Jun. 30, 2024
Designated as Hedging
Derivative [Line Items]
Notional amount		$ 130,000
Subordinated Debentures
Derivative [Line Items]
Number of derivative instruments | InterestRateSwap			2
Long-term debt			$ 30,930
Interest Rate Swaps
Derivative [Line Items]
Number of derivative instruments | InterestRateSwap	3
Interest Rate Swaps | Designated as Hedging
Derivative [Line Items]
Fair value on swap		283
Interest Rate Swaps | Subordinated Debentures
Derivative [Line Items]
Notional amount			$ 30,000
Fair value on swap		$ 0
Interest Rate Swaps Three
Derivative [Line Items]
Notional amount	$ 30,000
Derivative notional amount maturity period	3 years
Interest Rate Swaps Four
Derivative [Line Items]
Notional amount	$ 35,000
Derivative notional amount maturity period	4 years
Interest Rate Swaps Five
Derivative [Line Items]
Notional amount	$ 35,000
Derivative notional amount maturity period	5 years