Shareholders' Equity (Summary of the Company's Common and Preferred Stock) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Common Stock:
Shares authorized (in shares)	100,000,000	100,000,000
Shares issued (in shares)	57,950,803	56,518,119
Shares outstanding (in shares)	57,821,891	56,407,558
Cash dividend per share (in usd per share)	$ 1.00	$ 0.76
Preferred Stock:
Shares authorized (in shares)	20,000,000	20,000,000
Shares issued (in shares)	5,000,000	5,000,000
Shares outstanding (in shares)	5,000,000	5,000,000