Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands |
Jun. 30, 2016 |
Jun. 30, 2015 |
|---|---|---|
| Common Class A [Member] | ||
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized (in shares) | 150,000,000 | 150,000,000 |
| Common stock, shares issued (in shares) | 48,921,544 | 48,884,586 |
| Common Class B [Member] | ||
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized (in shares) | 600,000 | 600,000 |
| Common stock, shares issued (in shares) | 0 | 0 |
| Accounts receivable, allowance for doubtful accounts | $ 1,639 | $ 1,386 |
| Treasury stock, shares (in shares) | 21,175,416 | 20,477,617 |