Subsequent Events (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2020	Mar. 31, 2020	Dec. 31, 2018
Subsequent Event [Line Items]
Treasury Stock, Value, Acquired, Cost Method		$ 172,600
2012 Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchased and Retired During Period, Shares		680,016
Treasury Stock, Value, Acquired, Cost Method			$ 42,500
Subsequent Event [Member] | 2012 Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchased and Retired During Period, Shares	319,984
Treasury Stock, Value, Acquired, Cost Method	$ 23,600