Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Share-based Compensation, Activity

The following table summarizes the remaining shares authorized to be granted under the 2010 LTIP:

	Shares Authorized for Grant
Balance, December 31, 2017	479,953
Grants of RSUs	(38,806)
Grants of PSUs	(40,722)
Forfeitures of PSUs	5,679
Forfeitures of RSUs	1,515
Balance, December 31, 2018	407,619
Grants of RSUs	(71,716)
Grants of PSUs	(72,273)
Non-vesting PSUs(1)	12,689
PSUs added by performance factor(2)	(3,688)
Forfeitures of PSUs	17,150
Forfeitures of RSUs	9,461
Balance, December 31, 2019	299,242
Grants of RSUs	(26,818)
Grants of PSUs	(53,685)
Forfeitures of PSUs	2,589
Forfeitures of RSUs	1,653
Balance, December 31, 2020	222,981

(1) Non-vesting PSUs represent PSUs that did not meet their performance criteria, were cancelled and are available for future grant.

(2) PSUs added by performance factor represent additional PSUs that vested as a result of performance factor exceeding the target performance at which they were granted.

Share-based Compensation, Stock Options, Activity

The following table provides information about options outstanding:

	For the Year Ended December 31,
	2020					2019					2018
	Shares	Weighted Average Exercise Price		Weighted Average Grant Date Fair Value		Shares	Weighted Average Exercise Price		Weighted Average Grant Date Fair Value		Shares	Weighted Average Exercise Price		Weighted Average Grant Date Fair Value
Options outstanding, beginning of period	901	$	19.33	$	16.78	50,601	$	18.28	$	4.68	115,246	$	20.73	$	4.86
Expired	—	—		—		—	—		—		—	—		—
Exercised	(676)	19.67		18.06		(49,700)	18.26		4.46		(64,645)	22.65		5.00
Options outstanding, end of period	225	18.33		12.93		901	19.33		16.78		50,601	18.28		4.68

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table provides information related to options as of December 31, 2020: 

Range of Exercise Prices			Options Outstanding and Exercisable	Remaining Contractual Life (in years)	Weighted Average Exercise Price(1)
18.33	to	18.33	225	3.05	18.33

(1) Price of exercisable options

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value

Proceeds, related tax benefits realized from options exercised and intrinsic value of options exercised were as follows:

	Year Ended December 31,
(dollars in thousands)	2020		2019		2018
Proceeds from strike price of value of options exercised	$	12	$	907	$	1,464
Related tax benefit recognized	2		212		312
Proceeds of options exercised	$	14	$	1,119	$	1,776
Intrinsic value of options exercised	$	12	$	1,010	$	1,512

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable

The following table provides information about options outstanding and exercisable options:

	As of December 31,
	2020				2019				2018
(dollars in thousands, except share data and exercise price)	Options Outstanding		Exercisable Options		Options Outstanding		Exercisable Options		Options Outstanding		Exercisable Options
Number	225		225		901		901		50,601		50,601
Weighted average exercise price	$	18.33	$	18.33	$	19.33	$	19.33	$	18.28	$	18.28
Aggregate intrinsic value	$	3	$	3	$	20	$	20	$	1,478	$	1,478
Weighted average contractual term	3.1 years		3.1 years		2.6 years		2.6 years		0.7 years		0.7 years

Schedule of Nonvested Restricted Stock Units Activity

The following table details the RSUs for the years ended December 31, 2020, 2019 and 2018:

	Year Ended December 31,
	2020			2019			2018
	Number of Shares	Weighted Average Grant Date Fair Value		Number of Shares	Weighted Average Grant Date Fair Value		Number of Shares	Weighted Average Grant Date Fair Value
Beginning balance	115,466	$	38.57	76,746	$	39.71	75,707	$	35.80
Granted	26,818	36.58		71,716	36.28		38,806	42.23
Vested	(25,785)	39.00		(23,535)	34.66		(36,252)	34.38
Forfeited	(1,653)	39.12		(9,461)	40.23		(1,515)	36.52
Ending balance	114,846	38.00		115,466	38.57		76,746	39.71

Schedule of Nonvested Performance-based Units Activity

The following table details the PSUs for the years ended December 31, 2020, 2019 and 2018:

	Year Ended December 31,
	2020			2019			2018
	Number of Shares	Weighted Average Grant Date Fair Value		Number of Shares	Weighted Average Grant Date Fair Value		Number of Shares	Weighted Average Grant Date Fair Value
Beginning balance	136,271	$	37.87	121,656	$	36.82	168,453	$	—
Granted	53,685	35.90		72,273	34.26		40,722	44.56
Vested(1)	(37,456)	36.79		(31,507)	29.38		(81,840)	16.40
Added by performance factor	—	—		3,688	30.45		—	—
Non-vesting(2)	—	—		(12,689)	27.13		—	—
Forfeited	(2,589)	39.72		(17,150)	37.15		(5,679)	28.79
Ending balance	149,911	37.60		136,271	37.87		121,656	36.82

(1) Includes an aggregate of 39 shares paid in cash in lieu of fractional shares for the year ended December 31, 2019 .

(2) Non-vesting PSUs represent PSUs that did not meet their performance criteria, were cancelled and are available for future grant.