Compensation Plans Non Stock-based Compensation (Details) - Net Profits Plan [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Total Cash Payments, Made or Accrued under Profit Sharing Plan	$ 410,000	$ 2,600,000	$ 3,600,000	$ 8,100,000
Cash Payments Made or Accrued under Profit Sharing Plan Related to Divestiture Proceeds			$ 3,800,000	$ 8,300,000