| Schedule of Stockholders Equity | 
        
A summary of changes in shareholders’ equity is presented below (dollars in thousands): 
 
 
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   | 
   | 
Three Months Ended March 31, 2015  | 
 
   | 
   | 
(In thousands)  | 
 
   | 
   | 
 Number of 
Shares 
 | 
   | 
 Common 
Stock 
 | 
   | 
 Additional 
Paid-In 
Capital 
 | 
   | 
 Retained 
Earnings 
 | 
   | 
Total  | 
 
Balance at December 31, 2014  | 
   | 
39,147  | 
 
  | 
   | 
$  | 
391  | 
 
  | 
   | 
$  | 
538,788  | 
 
  | 
   | 
$  | 
570,310  | 
 
  | 
   | 
$  | 
1,109,489  | 
 
  | 
 
Net earnings  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
16,400  | 
 
  | 
   | 
16,400  | 
 
  | 
 
Exercise/vesting of equity awards  | 
   | 
470  | 
 
  | 
   | 
5  | 
 
  | 
   | 
2,829  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,834  | 
 
  | 
 
Excess income tax benefit from stock-based awards  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,935  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,935  | 
 
  | 
 
Equity award compensation expense  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
4,630  | 
 
  | 
   | 
—  | 
 
  | 
   | 
4,630  | 
 
  | 
 
Balance at March 31, 2015  | 
   | 
39,617  | 
 
  | 
   | 
$  | 
396  | 
 
  | 
   | 
$  | 
548,182  | 
 
  | 
   | 
$  | 
586,710  | 
 
  | 
   | 
$  | 
1,135,288  | 
 
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   | 
   | 
Three Months Ended March 31, 2014  | 
 
   | 
   | 
(In thousands)  | 
 
   | 
   | 
 Number of 
Shares 
 | 
   | 
 Common 
Stock 
 | 
   | 
 Additional 
Paid-In 
Capital 
 | 
   | 
 Retained 
Earnings 
 | 
   | 
Total  | 
 
Balance at December 31, 2013  | 
   | 
36,244  | 
 
  | 
   | 
$  | 
362  | 
 
  | 
   | 
$  | 
412,961  | 
 
  | 
   | 
$  | 
428,069  | 
 
  | 
   | 
$  | 
841,392  | 
 
  | 
 
Net earnings  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
25,377  | 
 
  | 
   | 
25,377  | 
 
  | 
 
Exercise/vesting of equity awards  | 
   | 
340  | 
 
  | 
   | 
4  | 
 
  | 
   | 
703  | 
 
  | 
   | 
—  | 
 
  | 
   | 
707  | 
 
  | 
 
Excess income tax benefit from stock-based awards  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,275  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,275  | 
 
  | 
 
Equity award compensation expense  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,411  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,411  | 
 
  | 
 
Issuance of stock (1)  | 
   | 
2,530  | 
 
  | 
   | 
25  | 
 
  | 
   | 
110,407  | 
 
  | 
   | 
—  | 
 
  | 
   | 
110,432  | 
 
  | 
 
Balance at March 31, 2014  | 
   | 
39,114  | 
 
  | 
   | 
$  | 
391  | 
 
  | 
   | 
$  | 
528,757  | 
 
  | 
   | 
$  | 
453,446  | 
 
  | 
   | 
$  | 
982,594  | 
 
  | 
 
  
  
(1) In January 2014, we issued 2,530,000 shares of common stock in a secondary public offering, par value $0.01 per share, at a price of $45.75 per share.
 
 
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