Stock-Based Compensation - Schedule of Stock Option Activity and Weighted Average Exercise Prices (Details) - Employee Stock Option $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Options
Beginning balance (in shares) | shares	486,682
Granted (in shares) | shares	0
Forfeited or expired (in shares) | shares	(9,740)
Exercised (in shares) | shares	(57,180)
Ending balance (in shares) | shares	419,762
Options exercisable at September 30, 2019 (in shares) | shares	408,489
Weighted- Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 52.37
Granted (in dollars per share) | $ / shares	0
Forfeited or expired (in dollars per share) | $ / shares	50.74
Exercised (in dollars per share) | $ / shares	39.18
Ending balance (in dollars per share) | $ / shares	54.20
Options exercisable at September 30, 2019 (in dollars per share) | $ / shares	$ 54.00
Weighted-Average Remaining Contractual Term (Years)
Weighted-average remaining contractual term, outstanding at September 30, 2019	3 years 2 months 12 days
Weighted-average remaining contractual term, options exercisable at September 30, 2019	2 years
Aggregate Intrinsic Value as of March 31, 2020
Aggregate intrinsic value outstanding at September 30, 2019 | $	$ 1,000
Aggregate intrinsic value of options exercisable at September 30, 2019 | $	$ 1,000