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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Retained Earnings | Treasury Stock
--- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2012 |  | 35,613,000 |  |  |
Beginning balance at Dec. 31, 2012 | $ 694,210 | $ 356 | $ 390,249 | $ 303,605 | $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net earnings | 124,464 |  |  | 124,464 |
Exercise/vesting of equity awards (in shares) |  | 631,000 |  |  |
Exercise/vesting of equity awards | 11,601 | $ 6 | 11,595 |  |
Excess income tax benefit from stock-based awards | 1,891 |  | 1,891 |  |
Equity award compensation expense | 9,483 |  | 9,483 |  |
Non-controlling interest acquisition | (257) |  | (257) |  |
Ending balance (in shares) at Dec. 31, 2013 |  | 36,244,000 |  |  |
Ending balance at Dec. 31, 2013 | 841,392 | $ 362 | 412,961 | 428,069 | 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net earnings | 142,241 |  |  | 142,241 |
Exercise/vesting of equity awards (in shares) |  | 373,000 |  |  |
Exercise/vesting of equity awards | 1,042 | $ 4 | 1,038 |  |
Excess income tax benefit from stock-based awards | 2,297 |  | 2,297 |  |
Equity award compensation expense | 12,211 |  | 12,211 |  |
Issuance of stock (in shares) |  | 2,530,000 |  |  |
Issuance of stock | 110,420 | $ 25 | 110,395 |  |
Other | $ (114) |  | (114) |  |
Ending balance (in shares) at Dec. 31, 2014 | 39,147,153 | 39,147,000 |  |  |
Ending balance at Dec. 31, 2014 | $ 1,109,489 | $ 391 | 538,788 | 570,310 | 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net earnings | 128,738 |  |  | 128,738 |
Exercise/vesting of equity awards (in shares) |  | 522,000 |  |  |
Exercise/vesting of equity awards | 2,886 | $ 6 | 2,880 |  |
Excess income tax benefit from stock-based awards | 2,043 |  | 2,043 |  |
Equity award compensation expense | $ 15,781 |  | 15,781 |  |
Ending balance (in shares) at Dec. 31, 2015 | 39,669,094 | 39,669,000 |  |  |
Ending balance at Dec. 31, 2015 | $ 1,258,937 | $ 397 | $ 559,492 | $ 699,048 | $ 0

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