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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Restricted Stock Units
A summary of our nonvested and vested restricted stock activity for the nine months ended September 30, 2013 and 2012 is presented below:

 
Shares Granted
 
Shares Vested
Nine months ended September 30,
Non-Vested
Shares Issued
 
Weighted-Average Grant Date
Fair Value
Per Share
 
Vested Shares
 
Total Fair Value at Vest Date(1)
(in thousands)
2013
—

 
$
—

 
(47,291
)
 
$
2,290

2012
62,137

 
41.84

 
(35,623
)
 
1.388

_______________
(1)
Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the date of vesting.
Summary of nonvested shares
A summary of our nonvested restricted stock activity from January 1, 2013 through September 30, 2013 is presented below:

 
Non-Vested
Restricted Stock
 
Weighted-Average
Grant Date
Fair Value
Per Share
Outstanding at January 1, 2013
95,241

 
$
40.42

Granted
—

 
—

Vested (1)
(47,291
)
 
39.12

Outstanding as of September 30, 2013
47,950

 
$
41.71

_______________
(1)
The total shares vested include 20,880 shares that were tendered in accordance with the terms of the 2006 Plan to satisfy minimum statutory tax withholding requirements related to the restricted shares that have vested. We accept the return of shares at the current quoted closing share price of the Company’s common stock to satisfy tax obligations.
Schedule of Share-based Compensation, Stock Options, Activity
A summary of our stock option activity from January 1, 2013 through September 30, 2013 is presented below:

 
Number of Options
 
Exercise Price
 
Remaining Contractual Term (years)
Outstanding at January 1, 2013
1,540,000

 
$
42.61

 
 
Granted
—

 
—

 
 
Exercised
(3,000
)
 
42.61

 
 
Forfeited
(12,000
)
 
42.61

 
 
Outstanding at September 30, 2013 (1)(2)
1,525,000

 
$
42.61

 
8.4
_______________
(1)
As of September 30, 2013, 305,000 of the outstanding stock options were exercisable.
(2)
The total intrinsic value of options outstanding at September 30, 2013 was $11.2 million.
Market Measure-Based Restricted Stock Units (RSUs) [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Restricted stock units market-measure assumptions [Table Text Block]
The expected life of the RSUs is equal to the six year vesting period.

 
April 2013 Market-Measure based RSU Grant
Grant date fair value per share
$44.55
Expected share price volatility
27.00%
Risk-free interest rate
0.90%
Dividend yield
3.60%
Expected life
6 years
Summary of Restricted Stock Units
A summary of our market-measure based RSU activity for the nine months ended September 30, 2013 and 2012 is presented below:

 
RSUs Granted
 
RSUs Vested
Nine months ended September 30,
Non-Vested
RSUs Issued
 
Weighted-Average Grant Date
Fair Value
Per Share
 
Vested RSUs
 
Total Vest-Date Fair Value
(in thousands)
2013
9,542

 
$
44.55

 
—

 
$
—

2012
103,239

 
41.20

 
—

 
—

A summary of our market-measure based RSU activity from January 1, 2013 through September 30, 2013 is presented below:
 
Nonvested RSUs
 
Vested RSUs
 
Total RSUs
 
Amount
 
Weighted-Average
Grant Date 
Fair Value
Per Share
 
Outstanding at January 1, 2013
88,491

 
$
41.20

 
14,748

 
103,239

Granted
9,542

 
44.55

 
—

 
9,542

Vested
—

 
—

 
—

 
—

Settled
—

 
 
 
—

 
—

Issuance of dividend equivalents
—

 
 
 
—

 
—

Modified from time based (1)
61,327

 
53.05

 
—

 
61,327

Canceled
 
 
 
 
—

 
—

Outstanding as of September 30, 2013
159,360

 
$
45.96

 
14,748

 
174,108

_______________
(1)
On April 4, 2013 the terms of time-based RSU’s granted to certain officers of the Company in January were modified to include market-measure and performance-based vesting requirements.
Time-Based Restricted Stock Units (RSUs) [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Restricted Stock Units
A summary of our time-based RSU activity from January 1, 2013 through September 30, 2013 is presented below:

 
Nonvested RSUs
 
Vested RSUs
 
Total RSUs
 
Amount
 
Weighted-Average
Grant Date 
Fair Value
Per Share
 
Outstanding at January 1, 2013
279,102

 
$
41.30

 
769,761

 
1,048,863

Granted, net of forfeitures
173,758

 
49.45

 
—

 
173,758

Vested
(73,574
)
 
38.80

 
73,574

 
—

Settled (1)
 
 
 
 
(10,342
)
 
(10,342
)
Issuance of dividend equivalents (2)
 
 
 
 
20,421

 
20,421

Modified to market-measure based (3)
(61,327
)
 
53.05

 
—

 
(61,327
)
Canceled (1)(4)
 
 
 
 
(3,800
)
 
(3,800
)
Outstanding as of September 30, 2013
317,959

 
$
46.13

 
849,614

 
1,167,573

_______________
(1)
Represents vested RSUs that are settled in cash or shares of the Company’s common stock.
(2)
RSUs issued as dividend equivalents are vested upon issuance.
(3)
During the second quarter the terms of time-based RSUs granted to certain officers of the Company in January were modified to include market-measure based vesting requirements.
(4)
We accept the return of RSUs, at the current quoted closing share price of the Company’s common stock, to satisfy minimum statutory tax-withholding requirements related to either the issuance, vesting or settlement of RSUs in accordance with the terms of the 2006 Plan.
A summary of our time-based RSU activity for the nine months ended September 30, 2013 and 2012 is presented below:
 
RSUs Granted
 
RSUs Vested
Nine months ended September 30,
Non-Vested
RSUs Issued
 
Weighted-Average Grant Date
Fair Value
Per Share
 
Vested RSUs
 
Total Vest-Date Fair Value (1)
(in thousands)
2013
173,758

 
$
49.45

 
(73,574
)
 
$
3,677

2012
204,829

 
44.34

 
(58,940
)
 
2,420

_______________
(1)
Total fair value of RSUs vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting.