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Stock Repurchase Program (Details) - USD ($) $ in Thousands | 3 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016
Equity, Class of Treasury Stock |  |
Remaining number of shares authorized to be repurchased (in shares) | 5,200,000 |
Total cost of repurchases | $ 40,775 | $ 0
Common Stock and Capital in Excess of Par Value, Shares |  |
Equity, Class of Treasury Stock |  |
Number of shares of common stock repurchased (in shares) | 433,000 | 0
Number of shares of common stock repurchased, not settled (in shares) | 8,079 |
Shares of common stock repurchased, not settled | $ 800 |

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