Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Dec. 31, 2014 |
Jan. 31, 2014 |
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Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||
Balance (in shares) | 39,147,153 | |||||||||
Balance | $ 1,109,489 | $ 841,392 | ||||||||
Net earnings | $ 30,308 | $ 32,577 | 75,841 | 93,033 | ||||||
Exercise/vesting of equity awards, value | 2,881 | 734 | ||||||||
Excess income tax benefit from stock-based awards | 2,040 | 2,197 | ||||||||
Equity award compensation expense | $ 12,418 | 9,035 | ||||||||
Issuance of stock, value | [1] | 110,420 | ||||||||
Other | (114) | |||||||||
Balance (in shares) | 39,665,797 | 39,665,797 | ||||||||
Balance | $ 1,202,669 | $ 1,056,697 | $ 1,202,669 | $ 1,056,697 | ||||||
Common stock, shares issued | 39,665,797 | 39,147,153 | 39,665,797 | 39,147,153 | 2,530,000 | |||||
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01 | |||||||
Sale of stock, price per share (in dollars per share) | $ 45.75 | |||||||||
Common Stock [Member] | ||||||||||
Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||
Balance (in shares) | 39,147,000 | 36,244,000 | ||||||||
Balance | $ 391 | $ 362 | ||||||||
Exercise/vesting of equity awards (in shares) | 519,000 | 351,000 | ||||||||
Exercise/vesting of equity awards, value | $ 6 | $ 4 | ||||||||
Issuance of stock (in shares) | [1] | 2,530,000 | ||||||||
Issuance of stock, value | [1] | $ 25 | ||||||||
Balance (in shares) | 39,666,000 | 39,125,000 | 39,666,000 | 39,125,000 | ||||||
Balance | $ 397 | $ 391 | $ 397 | $ 391 | ||||||
Common stock, shares issued | 39,666,000 | 39,125,000 | 39,147,000 | 36,244,000 | 39,666,000 | 39,147,000 | ||||
Additional Paid-in Capital [Member] | ||||||||||
Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||
Balance | $ 538,788 | $ 412,961 | ||||||||
Exercise/vesting of equity awards, value | 2,875 | 730 | ||||||||
Excess income tax benefit from stock-based awards | 2,040 | 2,197 | ||||||||
Equity award compensation expense | 12,418 | 9,035 | ||||||||
Issuance of stock, value | [1] | 110,395 | ||||||||
Other | (114) | |||||||||
Balance | $ 556,121 | $ 535,204 | 556,121 | 535,204 | ||||||
Retained Earnings [Member] | ||||||||||
Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||
Balance | 570,310 | 428,069 | ||||||||
Net earnings | 75,841 | 93,033 | ||||||||
Balance | $ 646,151 | $ 521,102 | $ 646,151 | $ 521,102 | ||||||
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