Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Share Repurchases [Line Items]
Purchase of common stock	$ 21,637	$ 52,916
February 2018 Authorization [Member]
Share Repurchases [Line Items]
Purchase of common stock		$ 52,916
Treasury Stock Acquired, Average Cost Per Share		$ 96.45
November 2020 Authorization
Share Repurchases [Line Items]
Number of shares authorized to be repurchased	20,000,000
Purchase of common stock	$ 21,637
Treasury Stock Acquired, Average Cost Per Share	$ 118.27
Remaining number of shares authorized to be repurchased	19,817,049