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Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Weighted-Average Assumptions Used to Estimate Grant Date Fair Values for Stock Options Granted

Weighted-average assumptions used to estimate the grant date fair values for stock options granted for the three and six month periods ended June 30, 2015 and 2014 follow:

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2015				2014				2015				2014
Volatility		37.91	%			35.89%				37.95	%			35.89	%
Expected term (in years)		5.00				5.00				5.00				5.00
Dividend yield		1.97	%			1.21%				2.00	%			1.17	%
Risk-free interest rate		1.35	%			1.76%				1.37	%			1.76	%

Stock Option Activity

Stock option activity from January 1, 2015 to June 30, 2015 follows:

					Weighted
					Average
	Underlying				Exercise
	Shares				Price
Outstanding at January 1, 2015		6,086,250			$	22.32
Granted		831,000			$	20.06
Exercised		—				—
Cancelled		(10,000	)		$	16.59
Expired		(300,000	)		$	24.63
Outstanding at June 30, 2015		6,607,250			$	21.94
Exercisable at June 30, 2015	$	5,333,927			$	21.62

Restricted Stock Activity

Restricted stock activity from January 1, 2015 to June 30, 2015 follows:

					Weighted
					Average
					Grant Date
	Shares				Fair Value
Non-vested restricted stock outstanding at January 1, 2015		1,493,059			$	26.93
Granted		792,100			$	20.60
Vested		(679,565	)		$	24.54
Forfeited		(46,632	)		$	26.90
Non-vested restricted stock outstanding June 30, 2015		1,558,962			$	24.76

Restricted Stock Unit Activity

Restricted stock unit activity from January 1, 2015 to June 30, 2015 follows:

					Weighted
					Average
					Grant Date
	Shares				Fair Value
Non-vested restricted stock units outstanding at January 1, 2015		34,085			$	30.20
Granted		22,100			$	20.85
Vested		(14,499	)		$	27.37
Forfeited		—				—
Non-vested restricted stock units outstanding June 30, 2015		41,686			$	26.22

Stock-Settled Performance Units

The total target number of shares with respect to the Stock-Settled Performance Units is set forth below:

	2015				2014				2013				2012				2011
	Performance				Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards				Unit Awards
Target number of shares		190,600				154,000				236,500				192,000				144,375

Fair Value of Stock-Settled Performance Units

The fair value of the Stock-Settled Performance Units is set forth below (in thousands):

	2015				2014				2013				2012				2011
	Performance				Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards				Unit Awards
Fair value at date of grant	$	4,052			$	5,388			$	5,564			$	3,065			$	5,569

Compensation Expense Associated with Stock-Settled Performance Units

These fair value amounts are charged to expense on a straight-line basis over the performance period. Compensation expense associated with the Stock-Settled Performance Units is shown below (in thousands):

	2015				2014				2013				2012				2011
	Performance				Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards				Unit Awards
Three months ended June 30, 2014	NA				$	449			$	464			$	255			NA
Three months ended June 30, 2015	$	338			$	449			$	464			NA				NA
Six months ended June 30, 2014	NA				$	449			$	928			$	510			$	464
Six months ended June 30, 2015	$	338			$	898			$	928			$	255			NA

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Share based compensation arrangement by share based payment award fair value.

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Tabular disclosure of the changes in outstanding nonvested performance-based units.

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