Stock Repurchases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Feb. 06, 2017
Stock Repurchases [Abstract]
Stock repurchase program, authorized repurchase amount			$ 150,000,000.0
Stock repurchased during period (in shares)	0	95,000
Stock repurchased during period, value		$ 4,200,000
Stock repurchase program, remaining authorized repurchase amount	$ 80,100,000