Consolidated Balance Sheets (Parenthetical) - shares shares in Thousands	Dec. 31, 2019	Dec. 31, 2018
Preferred Stock, Shares Authorized	300	300
Preferred Stock, Shares Outstanding	0	0
Treasury Stock, Shares	3,953	3,841
Common Stock
Common Stock, Shares Authorized	150,000	100,000
Common Stock, Shares, Issued	37,609	37,010
Class B Common Shares
Common Stock, Shares Authorized	12,000	12,000
Common Stock, Shares, Issued	6	6