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Equity Compensation Plans (Detail)
$ / shares in Units, shares in Thousands, $ in Thousands
Jun. 30, 2017
USD ($)
$ / shares
shares
Shares  
Outstanding at June 30, 2017(shares) | shares 399
Exercisable at June 30, 2017 (shares) | shares 219
Unvested at June 30, 2017 (shares) | shares 179
Weighted-Average Exercise Price (in dollars per share)  
Outstanding at June 30, 2017 (in dollars per share) | $ / shares $ 26.34
Exercisable at June 30, 2017 (in dollars per share) | $ / shares 16.49
Unvested at June 30 2017 (in dollars per share) | $ / shares $ 38.41
Aggregate Intrinsic Value  
Outstanding at June 30, 2017 | $ $ 10,588
Exercisable at June 30, 2017 | $ 7,727
Unvested at June 30, 2017 | $ $ 2,860