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STOCK BASED COMPENSATION PLANS (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Allocation of Recognized Compensation Expense

​

​	​	​	​	​	​	​	​	​	​
(in thousands)		2020			2019			2018
Stock options and restricted stock awards	​	$	287	​	$	328	​	$	350
Performance stock units	​		385	​		170	​		237
Restricted stock units	​		1,258	​		854	​		711
Total compensation expense	​	$	1,930	​	$	1,352	​	$	1,298

Summary of Stock Option Activity

​

​	​	​	​	​	​	​	​	​
​	​	Number of	​	Weighted		​	Aggregate
​	​	Stock Options	​	Average		​	Intrinsic Value
Stock Options		Outstanding		Exercise Price			(in thousands)
Outstanding at January 1, 2020		107,784	​	$	20.15		​
Granted		—	​		—		​
Exercised		(9,860)	​		18.42		​
Forfeited		(483)	​		16.96		​
Expired	​	(2,875)	​	​	21.90	​	​	​
Outstanding at December 31, 2020		94,566	​	$	20.29	​	$	226
​	​	​	​	​	​	​	​	​
Ending vested and expected to vest December 31, 2020		94,566	​	$	20.29	​	$	226
Exercisable at December 31, 2020		92,956	​		20.35	​		217

​

​	​	​	​	​	​	​	​	​
​	​	Number of	​	Weighted		​	Aggregate
​	​	Stock Options	​	Average		​	Intrinsic Value
Stock Options		Outstanding		Exercise Price			(in thousands)
Outstanding at January 1, 2019		121,637	​	$	19.96		​
Granted		—	​		—		​
Exercised		(13,853)	​		18.44		​
Forfeited		—	​		—		​
Outstanding at December 31, 2019		107,784	​	$	20.15	​	$	565
​	​	​	​	​	​	​	​	​
Ending vested and expected to vest December 31, 2019		107,784	​	$	20.15	​	$	565
Exercisable at December 31, 2019		98,460	​		20.48	​		483

Summary of Restricted Stock Awards Activity

​

​	​	​	​	​	​
​	​	Number of	​	​	​
​	​	Restricted Stock	​	Weighted Average
​	​	Awards	​	Grant Date Fair
Restricted Stock Awards		Outstanding		Value
Outstanding at January 1, 2020		—	​	$	—
Awarded		39,565	​		23.59
Vested		(39,565)	​		23.59
Forfeited		—	​		—
Outstanding at December 31, 2020		—	​	$	—
​	​	​	​	​	​
​	​	​	​	​	​

Performance stock units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Stock Units Activity

​

​	​	​	​	​	​
​	​	Number of	​	Weighted Average
​	​	Performance Stock	​	Grant Date Fair
Performance Stock Units		Units Outstanding		Value
Nonvested at January 1, 2020		43,058	​	$	26.01
Awarded		25,041	​		25.07
Vested and exercised		(10,369)	​		18.51
Forfeited		(1,402)	​		29.13
Nonvested at December 31, 2020		56,328	​	$	24.98

​

​	​	​	​	​	​
​	​	Number of	​	Weighted Average
​	​	Performance Stock	​	Grant Date Fair
Performance Stock Units		Units Outstanding		Value
Nonvested at January 1, 2019		37,865	​	$	26.77
Awarded		17,968	​		23.24
Vested and exercised		(11,801)	​		23.92
Forfeited		(974)	​		28.78
Nonvested at December 31, 2019		43,058	​	$	26.01

Restricted stock units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Stock Units Activity

​

​	​	​	​	​	​
​	​	Number of	​	Weighted Average
​	​	Restricted Stock	​	Grant Date Fair
​		Units Outstanding		Value
Outstanding at January 1, 2020	​	106,552		$	25.82
Granted	​	63,667	​	​	21.98
Vested and exercised	​	(31,565)	​	​	27.38
Forfeited	​	(7,256)	​	​	25.60
Outstanding at December 31, 2020	​	131,398	​	$	23.57

​

​

​	​	​	​	​	​
​	​	Number of	​	Weighted Average
​	​	Restricted Stock	​	Grant Date Fair
​		Units Outstanding		Value
Outstanding at January 1, 2019	​	80,740		$	28.24
Granted	​	50,352	​	​	22.45
Vested and exercised	​	(19,411)	​	​	26.11
Forfeited	​	(5,129)	​	​	29.28
Outstanding at December 31, 2019	​	106,552	​	$	25.82

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