Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Share-Based Compensation [Abstract]

Summary of transaction involving stock options

The following table summarizes the transactions involving the stock option plans:

				Weighted-		Weighted-
(in thousands				Average		Average		Aggregate
except exercise				Exercise		Remaining		Intrinsic
price and life)	Options			Price		Life (Years)		Value
Outstanding at December 31, 2009		910		$	22.13		4.4	$	3,852
Exercised		(582	)		22.16
Outstanding at December 31, 2010		328			22.06		3.9		4,807
Exercised		(121	)		21.55
Outstanding at December 31, 2011		207			22.36		3.1		3,222
Exercised		(66	)		22.38
Outstanding at December 31, 2012		141		$	22.35		2.7	$	1,859
Exercisable at December 31, 2012		141		$	22.35		2.7	$	1,859

Summary of information concerning outstanding and exercisable stock options

The following table summarizes information concerning outstanding and exercisable stock options at December 31, 2012:

	Range of Exercise Price
(in thousands except life and exercise price)	$	18.57-21.29	$	21.30-24.14	$	24.15-30.07
Options outstanding		62		40		39
Weighted-average remaining contractual life, in years		2.3		1.8		4.5
Weighted-average exercise price	$	19.49	$	22.85	$	26.39
Options exercisable		62		40		39
Weighted-average exercise price	$	19.49	$	22.85	$	26.39

Summary of nonvested stock activity

The following table summarizes the nonvested stock activity:

				Grant Date
				Weighted-		Aggregate
				Average		Intrinsic
(in thousands except fair value)	Shares			Fair Value		Value
Outstanding at December 31, 2009		424		$	24.44	$	11,142
Granted		265			34.45
Vested		(259	)		27.92
Cancelled		(67	)		24.79
Outstanding at December 31, 2010		363			29.20		13,340
Granted		270			35.48
Vested		(175	)		34.04
Cancelled		(58	)		28.45
Outstanding at December 31, 2011		400			31.42		15,142
Granted		293			36.09
Vested		(314	)		33.59
Cancelled		(40	)		33.41
Outstanding at December 31, 2012		339		$	33.22	$	12,046