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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2013 | $ 405,706 | $ 177,775 | $ 226,988 | $ 943
Beginning balance (in shares) at Dec. 31, 2013 |  | 42,846 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 22,974 |  | 22,974 |
Other comprehensive income (loss) | (3,355) |  |  | (3,355)
Excess tax benefits from stock-based compensation | 576 | $ 576 |  |
Stock-based compensation expense | 1,460 | 1,460 |  |
Options exercised | 9,638 | $ 9,638 |  |
Options exercised (in shares) |  | 878 |  |
Issuance of common stock under Employee Stock Purchase Plans | 450 | $ 450 |  |
Issuance of common stock under Employee Stock Purchase Plans (in shares) |  | 33 |  |
Shares surrendered in exchange for payment of payroll tax liabilities | (249) | $ (249) |  |
Shares surrendered in exchange for payment of payroll tax liabilities (in shares) |  | (16) |  |
Shares surrendered in exchange for the exercise of stock options | (1,941) | $ (1,941) |  |
Shares surrendered in exchange for the exercise of stock options (in shares) |  | (127) |  |
Ending balance at Dec. 31, 2014 | 435,259 | $ 187,709 | 249,962 | (2,412)
Ending balance (in shares) at Dec. 31, 2014 |  | 43,614 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 23,802 |  | 23,802 |
Other comprehensive income (loss) | (3,075) |  |  | (3,075)
Excess tax benefits from stock-based compensation | 2,124 | $ 2,124 |  |
Stock-based compensation expense | 2,243 | 2,243 |  |
Options exercised | 10,029 | $ 10,029 |  |
Options exercised (in shares) |  | 858 |  |
Issuance of common stock under Employee Stock Purchase Plans | 441 | $ 441 |  |
Issuance of common stock under Employee Stock Purchase Plans (in shares) |  | 23 |  |
Shares surrendered in exchange for payment of payroll tax liabilities | (918) | $ (918) |  |
Shares surrendered in exchange for payment of payroll tax liabilities (in shares) |  | (43) |  |
Shares surrendered in exchange for the exercise of stock options | (3,802) | $ (3,802) |  |
Shares surrendered in exchange for the exercise of stock options (in shares) |  | (185) |  |
Ending balance at Dec. 31, 2015 | $ 466,103 | $ 197,826 | 273,764 | (5,487)
Ending balance (in shares) at Dec. 31, 2015 | 44,267 | 44,267 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | $ 20,121 |  | 20,121 |
Other comprehensive income (loss) | 3,605 |  |  | 3,605
Excess tax benefits from stock-based compensation | 669 | $ 669 |  |
Stock-based compensation expense | 2,506 | 2,506 |  |
Options exercised | $ 4,923 | $ 4,923 |  |
Options exercised (in shares) | 362 | 362 |  |
Issuance of common stock under Employee Stock Purchase Plans | $ 694 | $ 694 |  |
Issuance of common stock under Employee Stock Purchase Plans (in shares) |  | 34 |  |
Shares surrendered in exchange for payment of payroll tax liabilities | (86) | $ (86) |  |
Shares surrendered in exchange for payment of payroll tax liabilities (in shares) |  | (4) |  |
Shares surrendered in exchange for the exercise of stock options | (346) | $ (346) |  |
Shares surrendered in exchange for the exercise of stock options (in shares) |  | (14) |  |
Ending balance at Dec. 31, 2016 | $ 498,189 | $ 206,186 | $ 293,885 | $ (1,882)
Ending balance (in shares) at Dec. 31, 2016 | 44,645 | 44,645 |  |

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