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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule Of Share Based Compensation Shares Authorized Under Stock Plans Issued And Avaliability
The following table summarizes the number of shares of common stock authorized for use under the 2019 Plan, the number of stock-based awards granted (net of expired or cancelled awards) under the 2019 Plan and the number of shares of common stock available for the grant of stock-based awards under the 2019 Plan:

Common stock authorized
11,000,000

Stock-based awards, including restricted stock and stock options granted, net of expired or cancelled
(212,425
)
Common stock available for grant of stock-based awards as of June 30, 2019
10,787,575
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total equity-based compensation for the three and six months ended June 30, 2019 and 2018 is as follows:

 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2019
 
2018
 
2019
 
2018
Restricted stock
$
4,938

 
$
4,212

 
$
9,555

 
$
8,138

Stock options
999

 
1,130

 
2,053

 
2,097

Total
$
5,937

 
$
5,342

 
$
11,608

 
$
10,235
Schedule Of Cash Proceeds And Intrinsic Values For Stock Options Exercised
Cash proceeds and intrinsic values related to total stock options exercised during the three and six months ended June 30, 2019 and 2018 are as follows:

 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2019
 
2018
 
2019
 
2018
Proceeds from stock options exercised
$
1,077

 
$
9,596

 
$
1,799

 
$
11,115

Intrinsic value of stock options exercised
$
513

 
$
4,902

 
$
842

 
$
5,479
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used The following weighted average assumptions were used for stock options granted during the six months ended June 30, 2019 and 2018:

 
 
2019
 
2018
Volatility
 
32.0% to 33.4%
 
25.1% to 27.2%
Risk free interest rate
 
2.3% to 2.5%
 
2.1% to 2.7%
Expected life in years
 
3.0 to 5.0
 
3.0 to 5.0
Dividend yield
 
1.7%
 
1.7%
Weighted average fair value
 
$8.31
 
$6.45
Schedule of Share-based Compensation, Stock Options, Activity
Activity relating to stock options granted under the Company’s plans and outside the plans during the six months ended June 30, 2019 is as follows:

 
 
Number of Shares
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term
 
Aggregate Intrinsic Value
Outstanding at January 1, 2019
 
2,815,000

 
$
26.03

 
 
 
 

Granted
 
34,000

 
32.46

 
 
 
 

Exercised
 
(80,000
)
 
22.53

 
 
 
 

Outstanding at June 30, 2019
 
2,769,000

 
$
26.21

 
4.3 years
 
$
21,435

Exercisable at June 30, 2019
 
1,565,000

 
$
26.15

 
3.7 years
 
$
12,211
Schedule of Nonvested Share Activity
The following table summarizes restricted stock activity during the six months ended June 30, 2019 and 2018:

 
 
2019
 
2018
 
 
Number of Shares
 
Weighted Average Fair Value at Grant Date
 
Number of Shares
 
Weighted Average Fair Value at Grant Date
Outstanding at January 1,
 
5,135,000

 
$
18.42

 
5,874,000

 
$
17.37

Granted
 
625,000

 
32.56

 
330,000

 
30.84

Vested
 
(281,000
)
 
26.03

 
(272,000
)
 
23.56

Forfeited
 
(15,000
)
 
26.86

 
(14,000
)
 
25.09

Outstanding at June 30,
 
5,464,000

 
$
19.60

 
5,918,000

 
$
17.81