Income Taxes (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Operating loss carryforwards
Combined federal alternative minimum tax credit carryforwards and foreign tax credits	$ 700,000
Impact - increase (decrease) - on Consolidated Balance Sheets due to uncertain tax benefit
Beginning Balance	340,000	490,000
Deductions for lapse of statute of limitations	(270,000)	(150,000)
Ending Balance	70,000	340,000
Unrecognized tax benefits which, if recognized, would affect the effective tax rate	70,000
Federal | United States
Operating loss carryforwards
Net operating loss carryforwards	658,600,000
State and local | United States
Operating loss carryforwards
Net operating loss carryforwards	422,300,000
Canadian federal | Canadian
Operating loss carryforwards
Net operating loss carryforwards	$ 3,300,000