Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Share-Based Compensation [Abstract]

Summary of share-based compensation expense

	Three months ended June 30,						Six months ended June 30,
	2012			2011			2012			2011
	(in thousands)
Restricted stock/performance-based restricted stock (“PBRS”)	$	971		$	937		$	1,720		$	1,615
Performance unit incentive plan (“PUP”)		434			194			672			259
Stock options		153			183			302			330
Restricted stock units/PBRS units		79			46			160			89
Total share-based compensation before income tax benefit		1,637			1,360			2,854			2,293
Income tax benefit		(591	)		(480	)		(1,031	)		(801	)
Total share-based compensation, net of income tax benefit	$	1,046		$	880		$	1,823		$	1,492

Summary of restricted stock and PBRS activity

	Restricted Stock					PBRS
	Shares			Weighted-Average Grant Date Fair Value		Shares			Weighted-Average Grant Date Fair Value
Balance at January 1, 2012		572,022		$	20.36		416		$	15.36
Granted		166,750			20.46		—			—
Vested		(189,071	)		17.99		(416	)		15.36
Forfeited		(3,450	)		25.31		—			—
Balance at June 30, 2012		546,251			21.18		—			—

Summary of liability-based award activity

	Restricted Stock Units					PBRS Units					PUP Awards
	Units			Weighted-Average Grant Date Fair Value		Units			Weighted-Average Grant Date Fair Value		Units		Weighted-Average Grant Date Fair Value
Balance at January 1, 2012		38,600		$	19.07		1,956		$	15.36		95,500	$	23.02
Granted		15,350			20.60		—			—		115,100		20.60
Vested		(13,100	)		15.36		(1,956	)		15.36		—		—
Balance at June 30, 2012		40,850			20.84		—			—		210,600		21.70

Summary of stock option activity

	Shares			Weighted- Average Exercise  Price		Options Exercisable
Options outstanding at January 1, 2012		584,201		$	23.32		396,688
Exercised		(4,562	)		19.57
Forfeited or expired		(191,881	)		26.18
Options outstanding at June 30, 2012		387,758			21.95		293,905