Benefit Plans - Employee Stock Ownership Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 15, 2015	Jan. 29, 2015
Compensation Related Costs [Abstract]
Minimum service period (over 12 month period)	1000 hours
Requisite service period	12 months
Percentage of shares to be purchased	8.00%			8.00%
Percentage of shares purchased			100.00%
Average purchase price (in dollars per share)	$ 12.45
ESOP loan payable, amortization period	20 years
ESOP loan payable, estimated interest rate	2.46%
ESOP loan payable, annual principal and interest payment	$ 835	$ 835
Allocation of ESOP shares	$ 702	$ 851
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Employee stock ownership plan (ESOP), number of allocated shares (in shares)	253,987	201,026
Employee stock ownership plan (ESOP), number of suspense shares (in shares)	794,042	847,003
Employee stock ownership plan (ESOP), total shares (in shares)	1,048,029	1,048,029	1,048,029
Fair value of unallocated shares	$ 14,396	$ 12,561