Stock-Based Compensation - Narrative (Details) $ in Thousands	1 Months Ended				12 Months Ended
	Apr. 30, 2020 installment shares	Feb. 28, 2020 metric shares	Jan. 31, 2020 installment shares	May 31, 2011 USD ($) shares	Dec. 31, 2020 USD ($) h mo shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	May 12, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized period for recognition					2 years 7 days
Issued (in shares)					2,500	0	0
Expiration period			10 years
Options, outstanding, intrinsic value | $					$ 54	$ 192
Options, vested in period, fair value | $					6	35	$ 80
Stock options compensation not yet recognized | $					$ 35
Requisite service hours per week, minimum | h					20
Requisite service months worked in a year | mo					5
Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of installments | installment			3
Number of grants distributions in the period (in grants)			1
Issued (in shares)			2,500
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation costs | $					$ 4,500
Salaries and Employee Benefits
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense | $					$ 5,300	$ 7,700	$ 6,600
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, grants in period (in shares)		152,184
Restricted Stock | Board of Directors Chairman
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, grants in period (in shares)	24,068
Number of installments | installment	3
Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, grants in period (in shares)		44,741			44,741	43,145
Award vesting rights, percentage		100.00%
Award vesting period		3 years
Number of performance metrics | metric		2
Nonvested awards, number of shares outstanding (in shares)					90,642	58,780	98,958
The 2016 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance								1,000,000
Stock Plan 2006 | Restricted Stock and PRSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested awards, number of shares outstanding (in shares)					308,673
Common stock awards, compensation not yet recognized | $					$ 7,900
Compensation cost not yet recognized period for recognition					1 year 10 months 20 days
The 2011 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized				550,000
ESPP percentage of market value of offering period				85.00%
Amount contributed to ESPP for participants, per pay period | $				$ 10
Amount contributed to ESPP for participants, per offering period, maximum | $				6,250
Amount contributed to ESPP for participants, annually | $				$ 25,000
Maximum employee subscription rate ESPP (percent)				10.00%
Number of shares available for grant					346,301
Award requisite service period					1 year