Stock Options and Restricted Stock (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Option Activity

The following table summarizes information about the stock option activity under the 2005 Incentive Plan:

	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (in years)
Outstanding at January 1, 2016		88,879			12.10		4.3
Granted		—			—		—
Exercised		(68,879	)		12.14		3.3
Canceled, forfeited, or expired		—			—		—
Outstanding at December 31, 2016		20,000			8.71		3.1
Exercisable at December 31, 2016		20,000			8.71		3.1
Outstanding at January 1, 2017		20,000			8.71		3.1
Granted		—			—		—
Exercised		—			—		—
Canceled, forfeited, or expired		—			—		—
Outstanding at December 31, 2017		20,000			5.21		2.1
Exercisable at December 31, 2017		20,000			5.21		2.1
Outstanding at January 1, 2018		20,000			5.21		2.1
Granted		—			—		—
Exercised		(15,000	)		4.46		0.9
Canceled, forfeited, or expired		—			—		—
Outstanding at December 31, 2018		5,000			3.95		1.9
Exercisable at December 31, 2018		5,000			3.95		1.9

Weighted Average Grant Date Fair Values of Options Granted

	2018		2017		2016
	(in thousands)
Cash received from option exercises	$	67	$	—	$	837
Total tax benefits realized for tax deductions from    options exercised		—		—		833
Total intrinsic value of options exercised		766		—		2,967
Grant date fair value of options vested		—		—		—
Aggregate intrinsic value of vested options outstanding		264		1,128		1,073

Restricted Stock Activity

The following table summarizes information about the restricted stock activity under the 2005 Incentive Plan:

	Shares			Weighted- Average Grant- Date Fair Value per Share
Nonvested balance at January 1, 2016		1,600			27.35
Granted		—			—
Vested		(800	)		27.35
Forfeited		—			—
Nonvested balance at December 31, 2016		800			27.35
Granted		—			—
Vested		(800	)		27.35
Forfeited		—			—
Nonvested balance at December 31, 2017		—			—
Granted		—			—
Vested		—			—
Forfeited		—			—
Nonvested balance at December 31, 2018		—			—

The following table summarizes information about the common and restricted stock activity under the 2012 Incentive Plan:

	Shares			Weighted- AverageGrant- Date Fair Value per Share
Nonvested balance at January 1, 2016		77,528			40.57
Granted		27,077			54.44
Vested		(26,294	)		45.18
Forfeited		(1,919	)		—
Nonvested balance at December 31, 2016		76,392			43.91
Granted		9,326			55.58
Vested		(24,839	)		43.89
Forfeited		—			—
Nonvested balance at December 31, 2017		60,879			45.71
Granted		3,304			59.16
Vested		(24,608	)		44.31
Forfeited		—			—
Nonvested balance at December 31, 2018		39,575			48.93

The following table summarizes information about the restricted stock activity under the Non-Employee Director Restricted Stock Plan:

	Shares			Weighted- Average Grant- Date Fair Value per Share
Nonvested balance at January 1, 2016		7,112			44.26
Granted		5,952			63.57
Vested		(7,488	)		44.54
Forfeited		—			—
Nonvested balance at December 31, 2016		5,576			64.50
Granted		6,454			54.20
Vested		(5,576	)		64.50
Forfeited		—			—
Nonvested balance at December 31, 2017		6,454			54.20
Granted		5,761			60.75
Vested		(6,454	)		54.20
Forfeited		—			—
Nonvested balance at December 31, 2018		5,761			60.75