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Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Feb. 28, 2019	May 31, 2011	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	May 12, 2016
Options, outstanding, intrinsic value			$ 192,000	$ 1,200
Options, vested in period, fair value			35	80	$ 71
Stock options compensation not yet recognized			$ 2
Compensation cost not yet recognized period for recognition			4 months 9 days
Chief Executive Officer
stock-based compensation costs			$ 4,500
Salaries and Employee Benefits
Allocated share-based compensation expense			$ 7,700	$ 6,600	$ 5,600
Restricted Stock
Common stock, grants in period	112,636
Performance Awards
Common stock, grants in period	43,145		43,145	42,533
Award vesting period	3 years
Award vesting rights, percentage	100.00%
Nonvested awards, number of shares outstanding			58,780	98,958	62,338
The 2016 Plan
Common stock, capital shares reserved for future issuance						1,000,000
Stock Plan 2006 | Restricted Stock and PRSU
Compensation cost not yet recognized period for recognition			1 year 9 months 3 days
Nonvested awards, number of shares outstanding			169,494
Common stock awards, compensation not yet recognized			$ 5,300
The 2011 ESPP
Number of additional shares authorized		550,000
ESPP percentage of market value of offering period		85.00%
Number of shares available for grant			371,093
The 2011 ESPP | Maximum
Maximum employee subscription rate ESPP (percent)		10.00%
The 2011 ESPP | Maximum | Annually
Amount contributed to ESPP for participants		$ 25,000
The 2011 ESPP | Maximum | Offering Period
Amount contributed to ESPP for participants		6,250
The 2011 ESPP | Minimum | Pay Period
Amount contributed to ESPP for participants		$ 10

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