Shareholders' Equity - Summary of Share Count and Par Value Data Related to Shareholders' Equity (Details) - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Preferred Stock
Preferred stock, shares authorized	25,000,000	25,000,000		25,000,000
Preferred stock, shares outstanding	0	0		0
Common Stock
Common stock, shares authorized	75,000,000	75,000,000		75,000,000
Common stock, shares issued	57,066,930	57,066,930		56,929,298
Common stock, shares outstanding	32,267,307	32,267,307	32,707,281	32,472,406	32,750,727
Treasury stock
Treasury stock, shares held	24,799,623	24,799,623		24,456,892
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	84,720	61,780	108,894