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Stock Compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The assumptions used for grants in the years ended December 31, 2013 and 2011 were as follows:

 
2013
 
2011
Risk-free interest rate
0.6% – 1.8%

 
1.4% – 1.9%
Expected volatility
20.05% – 24.08%

 
24.78% – 25.02%
Dividend yield
0.0
%
 
0.0% - 10.08%
Expected holding period
4.00 – 10.00 years
 
4.00 – 4.75 years
Weighted-average grant date fair value
$2.72 – $5.80

 
$0.90 – $3.81
Schedule of Share-based Compensation, Stock Options, Activity
A summary of employee stock option transactions follows:

 
Number of
Shares
 
Weighted-Average
Exercise Price
 
Weighted-Average
Remaining
Contractual Term
(Years)
 
Aggregate
Intrinsic
Value(1)
Outstanding on January 1, 2011
2,664,481

 
$
12.13

 
6.0
 
$
11,208

Granted
529,035

 
$
14.84

 
 
 
 

Exercised
(557,887
)
 
$
10.33

 
 
 
 

Canceled
(212,225
)
 
$
—

 
 
 
 

Outstanding on December 31, 2011
2,423,404

 
$
12.48

 
7.6
 
$
11,187

Granted
—

 
$
—

 
 
 
 

Exercised
(16,883
)
 
$
8.25

 
 
 
 

Canceled
(6,599
)
 
$
14.35

 
 
 
 

Outstanding on December 31, 2012
2,399,922

 
$
12.50

 
6.6
 
$
4,371

Granted
787,500

 
$
15.36

 
 
 
 

Exercised
(40,175
)
 
$
13.54

 
 
 
 

Canceled
(13
)
 
$
—

 
 
 
 
Outstanding on December 31, 2013
3,147,234

 
$
13.21

 
6.5
 
$
9,959

Options exercisable at:
 

 
 

 
 
 
 

December 31, 2011
411,452

 
 

 
 
 
 

December 31, 2012
418,359

 
 

 
 
 
 

December 31, 2013
1,777,158

 
 

 
 
 
 

_____________________________
(1)
The aggregate intrinsic value represents the amount by which the fair value of the underlying common stock ($16.37, $14.16 and $16.10 at December 31, 2013, 2012 and 2011, respectively) exceeds the option exercise price.
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
Additional information relating to options outstanding at December 31, 2013 follows:
 
 
 
 
Options Outstanding
 
Options Exercisable
Range of Exercise Prices
 
Outstanding
as of
 
Weighted-Average
Remaining
Contractual Life
(Years)
 
Weighted-Average
Exercise Price
 
Exercisable
as of
 
Weighted-Average
Remaining
Contractual Life
(Years)
 
Weighted-Average
Exercise Price
 
Aggregate Intrinsic Value
 
12/31/2013
 
 
 
12/31/2013
 
 
 
$0.00
-
$12.13
 
1,679,616

 
5.3

 
$
11.64

 
1,679,616

 
5.3
 
$
11.64

 
$
—

$12.13
-
$14.55
 
180,024

 
5.7

 
$
13.61

 
97,542

 
5.0
 
$
13.64

 
—

$15.28
-
$16.98
 
1,287,594

 
8.3

 
$
15.19

 
—

 
 
 
$
—

 
—

$17.82
-
$19.40
 
—

 
—

 
$
—

 
—

 
 
 
$
—

 
—

$20.37
-
$21.83
 
—

 
—

 
$
—

 
—

 
 
 
$
—

 
—

$22.91
-
$24.25
 
—

 
—

 
$
—

 
—

 
 
 
$
—

 
—

$0.00
-
$0.00
 
—

 
—

 
$
—

 
—

 
 
 
$
—

 
—

$0.00
-
$0.00
 
—

 
—

 
$
—

 
—

 
 
 
$
—

 
—

 
 
 
 
3,147,234

 
6.5

 
$
13.21

 
1,777,158

 
5.3
 
$
11.75

 
$
8,203