Stockholder's Equity (Schedule of Common Stock Activity) (Details)	3 Months Ended
	Mar. 31, 2020 shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, outstanding (in shares)	94,742,564
Beginning balance, issued (in shares)	162,188,287
Common stock issuance - acquisition	3,094,697
Restricted stock issued (in shares)	777,774
Shares held to cover taxes on vesting restricted shares and other (in shares)	(297,803)
Employee stock purchase plan participation (in shares)	48,882
Ending balance, outstanding (in shares)	98,366,114
Ending balance, issued (in shares)	163,014,943
Issued
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, issued (in shares)	162,188,287
Restricted stock issued (in shares)	777,774
Employee stock purchase plan participation (in shares)	48,882
Ending balance, issued (in shares)	163,014,943
Less Treasury
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, outstanding (in shares)	(67,445,723)
Common stock issuance - acquisition	3,094,697
Shares held to cover taxes on vesting restricted shares and other (in shares)	(297,803)
Ending balance, outstanding (in shares)	(64,648,829)