Consolidated Balance Sheets Parentheticals - $ / shares shares in Thousands	Dec. 31, 2018	Dec. 31, 2017
Consolidated Balance Sheets Parentheticals [Abstract]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	5,000	5,000
Preferred Stock, Shares Issued	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	395,000	395,000
Common Stock, Shares, Issued	90,689	90,689
Common Stock, Shares, Outstanding	81,930	83,303
Treasury Stock, Shares	8,759	7,386