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Stock-based Compensation (Tables)

9 Months Ended

Sep. 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 nine month periods ended September 30, 2015 and 2014 follow:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015		2014				2015				2014
Volatility	NA			35.64%				37.95	%			35.89	%
Expected term (in years)	NA			5.00				5.00				5.00
Dividend yield	NA			1.18%				2.00	%			1.17	%
Risk-free interest rate	NA			1.62%				1.37	%			1.76	%

Stock Option Activity

Stock option activity from January 1, 2015 to September 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		(600,000	)		$	26.06
Outstanding at September 30, 2015		6,307,250			$	21.68
Exercisable at September 30, 2015		5,134,697			$	21.39

Restricted Stock Activity

Restricted stock activity from January 1, 2015 to September 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		(728,400	)		$	24.74
Forfeited		(65,853	)		$	26.22
Non-vested restricted stock outstanding September 30, 2015		1,490,906			$	24.67

Restricted Stock Unit Activity

Restricted stock unit activity from January 1, 2015 to September 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 September 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 September 30, 2014	NA				$	449			$	464			$	255			NA
Three months ended September 30, 2015	$	338			$	449			$	464			NA				NA
Nine months ended September 30, 2014	NA				$	898			$	1,391			$	766			$	464
Nine months ended September 30, 2015	$	675			$	1,347			$	1,391			$	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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