Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Based Compensation Expense

The following table discloses the amount of stock-based compensation expense:

	Stock Based Compensation
	2011		2012		2013
Stock options	$	2,533	$	3,388	$	3,934
Stock awards		—		67		—
Restricted stock units		1,214		1,169		1,092
Performance stock units		366		3,412		1,947
Total stock-based compensation	$	4,113	$	8,036	$	6,973

Weighted-Average Assumptions

The fair value of these options was estimated at the date of grant using a Black-Scholes option pricing model with the following weighted-average assumptions:

	2011			2012			2013
Risk-free interest rate		2.7	%		1.2	%		1.2	%
Dividend yield		1.8	%		2.7	%		1.7	%
Expected volatility of the Company’s common stock		0.615			0.644			0.646
Expected life in years		6.0			6.0			6.0

Details of Stock Options Activity

The weighted average fair value of options granted in 2011, 2012 and 2013 was $11.57, $7.33 and $12.97, respectively. Compensation expense for these options is recorded over the vesting period.

Summarized information for the plans follows:

				Weighted		Aggregate
				Average		Intrinsic
	Number of			Exercise		Value
	Shares			Price (per share)		(thousands)
Outstanding at January 1, 2013		1,486,351		$	17.63
Granted		330,639			25.43
Exercised		(93,845	)		18.24
Cancelled		(12,901	)		18.63
Outstanding at December 31, 2013		1,710,244			19.09	$	8,941
Exercisable at December 31, 2013		899,616			17.81		5,619
Available for Grant at December 31, 2013		1,766,818

	Year ended December 31
	2011		2012		2013
Weighted average grant-date fair value of options granted (per share)	$	11.57	$	7.33	$	12.97
Aggregate intrinsic value of options exercised (thousands)	$	3,515	$	10,256	$	877
Total fair value of shares vested (thousands)	$	1,655	$	2,641	$	3,407

Segregated Disclosure of Options Outstanding

Segregated disclosure of options outstanding at December 31, 2013 was as follows:

	Range of Exercise Prices
	Less than or equal to $15.63		Greater than $15.63
Options outstanding		704,163		1,006,081
Weighted average exercise price	$	14.28	$	22.46
Remaining contractual life		7.4		6.6
Options exercisable		321,285		578,331
Weighted average exercise price	$	12.68	$	20.66

Details of Nonvested Restricted Stock Units Activity

 The following table provides details of the nonvested RSUs for 2013:

				Weighted
				Average
	Number of			Grant-Date
	Restricted			Fair Value
	Units			(per share)
Nonvested at January 1, 2013		110,871		$	21.93
Granted		1,000			25.72
Vested		(52,509	)		21.38
Accrued dividend equivalents		1,324			28.57
Nonvested at December 31, 2013		60,686		$	22.61

	Year ended December 31
	2011		2012		2013
Weighted average grant-date fair value of restricted shares granted (per share)	$	23.68	$	15.54	$	25.72
Total fair value of shares vested (thousands)	$	811	$	1,495	$	1,122

Performance Based Units Earned Under Long-Term Incentive Plan

The following table provides details of the nonvested PSUs earned under the Company’s Long-Term Incentive Plan:

				Weighted
				Average
	Number of			Grant-Date
	Restricted			Fair Value
	Units			(per share)
Nonvested at January 1, 2013		216,623		$	15.63
Earned		33,405			25.43
Vested		(97,367	)		16.77
Cancelled		(1,384	)		15.63
Adjustment to outstanding units		2,077			15.63
Accrued dividend equivalents		3,418			26.86
Nonvested at December 31, 2013		156,772		$	17.25