Share Repurchase Program (Details) - USD ($) $ in Thousands	12 Months Ended			29 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020
Share Repurchase Program [Abstract]
Stock Repurchase Program, Authorized Amount	$ 50,000			$ 50,000
Treasury Stock, Shares, Acquired	100,000			1,400,000
Treasury Stock, Value, Acquired, Cost Method	$ 1,912	$ 5,150	$ 25,709	$ 32,800
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 17,200			$ 17,200