Capital Stock (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Class Of Stock [Line Items]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, par value	$ 0.01	$ 0.01
Phanotm Stock Units	860,244
Phantom Stock Value Per Share	$ 3.33
Total Shares Authorized	360,000,000
Class A
Class Of Stock [Line Items]
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value	$ 0.01	$ 0.01
Votes per share	1
Class B
Class Of Stock [Line Items]
Common stock, shares authorized	150,000,000	150,000,000
Common stock, par value	$ 0.01	$ 0.01
Votes per share	10