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Stock Based Compensation Restricted Stock Unit Awards (Details) - Restricted Stock Units (RSUs) [Member]
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Sep. 30, 2017
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Outstanding, period start, number of shares | shares 386
Granted, number of shares | shares 83
Vested, number of shares | shares (139)
Forfeited, number of shares | shares (3)
Outstanding, period end, number of shares | shares 327
Outstanding, period start, weighted average grant date fair value | $ / shares $ 67.84
Granted, weighted average grant date fair value | $ / shares 90.11
Vested, weighted average grant date fair value | $ / shares 53.80
Forfeited, weighted average grant date fair value | $ / shares 75.36
Outstanding, period end, weighted average grant date fair value | $ / shares $ 79.38
Restricted Stock Units, Aggregate Intrinsic Value, Outstanding | $ $ 33,659