Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2019	Sep. 30, 2019	Jun. 30, 2020
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock		$ 30,000	$ 5,937
2018 Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount						$ 150,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount						$ 98,720
Open Market [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock Acquired, Average Cost Per Share				$ 69.85
Repurchase of common stock (shares)				85,000
Repurchase of common stock				$ 5,937
ASR [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock Acquired, Average Cost Per Share					$ 42.91
Repurchase of common stock (shares)	72,875	626,305			699,180
Repurchase of common stock		$ 30,000