Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation [Abstract]

Summary of the activity under stock option plan

	Options			Wgtd. Avg. Exercise Price		Wgtd. Avg. Remaining Contractual Term			Aggregate Intrinsic Value
	(Dollars in thousands, except per share data)
Six Months Ended June 30, 2012
Outstanding at December 31, 2011		1,298,431		$	30.14
Options granted		—			—
Options exercised		(42,133	)		17.13
Options canceled, forfeited, or expired		—			—
Outstanding at June 30, 2012		1,256,298			30.58		8.39	Yr	$	14,237
Exercisable at June 30, 2012		699,848			24.44		5.27	Yr	$	12,223

Non-vested options and changes

	Options
Non-vested at December 31, 2011		591,700
Options granted		—
Options vested		(35,250	)
Options forfeited		—
Non-vested at June 30, 2012		556,450

Options granted and options exercised under stock option plan

	Three Months Ended June  30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(Dollars in thousands, except per share data)
Weighted average grant-date fair value per share of options granted	$	—	$	11.36	$	—	$	12.48
Total intrinsic value of options exercised		617		—		1,749		405
Cash received from options exercised		239		—		722		438
Tax benefit realized from options exercised		239		—		677		157

Stock-based employee compensation expense

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
	(Dollars in thousands)
Stock-based compensation expense	$	357		$	271		$	798		$	646
Tax		(138	)		(105	)		(309	)		(250	)
Stock-based compensation expense, net of tax	$	219		$	166		$	489		$	396

Remaining fair value of stock options

	June 30, 2012
	(Dollars in thousands)
Fair value of stock options	$	5,675

Assumptions used for computing stock-based employee compensation expense

	Six Months Ended June  30,
	2012			2011
Risk-free interest rate		1.78	%		3.61	%
Dividend yield		2.00	%		2.00	%
Stock price volatility		38.72	%		25.26	%
Expected term		10	Yrs		10	Yrs