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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Treasury Stock | Retained Earnings
--- | --- | --- | --- | --- | ---
Balances at Jun. 30, 2014 | $ 335,264 | $ 88 | $ 145,872 | $ (123,864) | $ 313,168
Balances (in shares) at Jun. 30, 2014 |  | 88,179,448 |  | (44,238,960) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income and comprehensive income | 129,663 |  |  |  | 129,663
Stock options exercised | $ 1,686 | $ 0 | 1,686 |  |
Stock options exercised (in shares) | 299,034 | 299,034 |  |  |
Restricted stock units issued, net of tax withholdings | $ (1,798) |  | (1,798) |  |
Restricted stock units issued, net of tax withholdings (in shares) |  | 130,792 |  |  |
Retirement of treasury shares | 0 |  | (138,864) | $ 138,864 |
Retirement of treasury shares (in shares) |  | 0 |  | 44,768,739 |
Cash dividend to common stock (in dollars per share) | (15,020) |  |  |  | (15,020)
Repurchases of Common Stock | (34,712) | $ (1) | (13,967) | $ (15,000) | (5,744)
Repurchase of common stock (in shares) |  | (1,195,497) |  | (529,779) |
Stock-based compensation expense | 4,992 |  | 4,992 |  |
Tax impact of employee stock transactions | 2,079 |  | 2,079 |  |
Balances at Jun. 30, 2015 | 422,154 | $ 87 | 0 | $ 0 | 422,067
Balances (in shares) at Jun. 30, 2015 |  | 87,413,777 |  | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income and comprehensive income | 213,616 |  |  |  | 213,616
Stock options exercised | $ 1,106 |  | 1,106 |  |
Stock options exercised (in shares) | 171,263 | 171,263 |  |  |
Restricted stock units issued, net of tax withholdings | $ (1,223) |  | (1,223) |  |
Restricted stock units issued, net of tax withholdings (in shares) |  | 104,436 |  |  |
Repurchases of Common Stock | (200,000) | $ (6) | (4,606) | $ 0 | (195,388)
Repurchase of common stock (in shares) |  | (6,022,347) |  | 0 |
Stock-based compensation expense | 3,719 |  | 3,719 |  |
Tax impact of employee stock transactions | 1,004 |  | 1,004 |  |
Balances at Jun. 30, 2016 | 440,376 | $ 82 | 0 | $ 0 | 440,294
Balances (in shares) at Jun. 30, 2016 |  | 81,667,129 |  | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income and comprehensive income | 257,506 |  |  |  | 257,506
Stock options exercised | $ 1,436 |  | 1,436 |  |
Stock options exercised (in shares) | 502,350 | 502,350 |  |  |
Restricted stock units issued, net of tax withholdings | $ (1,594) |  | (1,594) |  |
Restricted stock units issued, net of tax withholdings (in shares) |  | 88,897 |  |  |
Repurchases of Common Stock | (98,745) | $ (2) | (2,102) |  | (96,641)
Repurchase of common stock (in shares) |  | (1,982,411) |  |  |
Stock-based compensation expense | 2,785 |  | 2,785 |  | 0
Balances at Jun. 30, 2017 | $ 601,764 | $ 80 | $ 525 | $ 0 | $ 601,159
Balances (in shares) at Jun. 30, 2017 |  | 80,275,965 |  | 0 |

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