Stock Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Compensation cost, net of forfeitures, related to stock-based compensation

The following table summarizes the compensation cost, net of forfeitures, related to stock-based compensation for the years ended December 31, 2012, 2011 and 2010:

	2012			2011			2010
Stock and stock unit awards:
Pre-tax compensation expense	$	210		$	92		$	—
Income tax benefit	(73		)	(32		)	—
Stock and stock unit awards expense, net of income taxes	$	137		$	60		$	—
Stock options:
Pre-tax compensation expense	$	17		$	52		$	52
Income tax benefit	(6		)	(1		)	(1		)
Stock options expense, net of income taxes	$	11		$	51		$	51
Total share-based compensation:
Pre-tax compensation expense	$	227		$	144		$	52
Income tax benefit	(79		)	(33		)	(1		)
Total share-based compensation expense, net of income taxes	$	148		$	111		$	51

Summary of option activity

A summary of option activity under the SI Plan and the 1997 Stock Incentive Plan as of December 31, 2012, 2011 and 2010, and changes during the years then ended is presented below:

	2012
	Shares	Weighted-Average Exercise Price	Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding, beginning of year	228,140	$23.09
Granted	0	$0.00
Exercised	(44,763)	$15.90
Forfeited or expired	(6,752)	$24.00
Outstanding, end of year	176,625	$24.88	2.81	$	89,061
Exercisable, end of year	170,000	$24.95	2.69	$	89,061

The total intrinsic value of options exercised during 2012 was $332,000. Stock options for 108,125 shares of common stock were not considered in computing the aggregate intrinsic value of outstanding shares and exercisable shares for 2012 because they were anti-dilutive.

	2011
	Shares	Weighted-Average Exercise Price	Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding, beginning of year	239,532	$22.50
Granted	0	$0.00
Exercised	(11,392)	$10.67
Forfeited or expired	0	$0.00
Outstanding, end of year	228,140	$23.09	3.32	$	159,552
Exercisable, end of year	207,265	$22.98	2.99	$	159,552

The total intrinsic value of options exercised during 2011 was $90,000. Stock options for 202,970 and 182,095 shares of common stock were not considered in computing the aggregate intrinsic value of outstanding shares and exercisable shares, respectively, for 2011 because they were anti-dilutive.

	2010
	Shares	Weighted-Average Exercise Price	Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding, beginning of year	289,033	$20.54
Granted	0	$0.00
Exercised	(49,500)	$11.05
Forfeited or expired	(1)	$8.37
Outstanding, end of year	239,532	$22.50	4.16	$	204,345
Exercisable, end of year	204,407	$22.18	3.58	$	204,345

The total intrinsic value of options exercised during 2010 was $365,000. Stock options for 202,970 and 167,845 shares of common stock were not considered in computing the aggregate intrinsic value of outstanding shares and exercisable shares, respectively, for 2010 because they were anti-dilutive.

Unvested options

A summary of the status of the Company’s shares subject to unvested options under the SI Plan and the 1997 Stock Incentive Plan as of December 31, 2012, 2011 and 2010, and changes during the years then ended, is presented below:

	2012		2011		2010
	Shares	Weighted-Average Grant-Date Fair Value	Shares	Weighted-Average Grant-Date Fair Value	Shares	Weighted-Average Grant-Date Fair Value
Unvested, beginning of year	20,875	$3.16	35,125	$3.29	49,375	$3.34
Granted	0	$0	0	$0	0	$0
Vested	(14,250)	$3.47	(14,250)	$3.47	(14,250)	$3.47
Forfeited	0	$0	0	$0	0	$0.00
Unvested, end of year	6,625	$2.51	20,875	$3.16	35,125	$3.29

Stock options, by exercise price range

The following table summarizes information about stock options under the SI Plan outstanding at December 31, 2012:

		Options Outstanding		Options Exercisable
Range of Exercise Prices	Number Outstanding	Weighted-Average Remaining Contractual Life	Weighted-Average Exercise Price	Number Exercisable	Weighted-Average Exercise Price
Below $22.50	42,750	0.96	$20.67	42,750	$20.67
$22.50 to $24.50	25,750	5.96	$23.00	19,125	$23.00
$24.50 to $26.50	30,500	4.95	$26.10	30,500	$26.10
Above $26.50	77,625	1.95	$27.33	77,625	$27.33
	176,625	2.81	$24.88	170,000	$24.95

Schedule of Unvested Restricted Stock and Restricted Stock Units Roll Forward [Table Text Block]

The following table summarizes non-vested stock and stock unit activity for the years ended December 31, 2012 and 2011:

	2012			2011
	Shares	Weighted-avg Grant-date Fair Value		Shares	Weighted-avg Grant-date Fair Value
Nonvested, beginning of year	15,096	$18.70		0	$0.00
Granted	15,162	$25.50		17,409	$18.70
Vested	(4,179)	$21.84		(2,313)	$18.70
Forfeited	(742)	$21.87		0	$0.00
Nonvested, end of year	25,337	$22.16		15,096	$18.70
Fair value of shares vested		$	91,259		$	42,675