Share-Based Compensation Arrangements (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended				9 Months Ended	3 Months Ended		9 Months Ended			3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Common Class A [Member]	Dec. 31, 2011 Common Class A [Member]	Sep. 30, 2012 March 2, 2012 grant [Member]	Sep. 30, 2012 March 7, 2011 grant [Member]	Sep. 30, 2011 March 7, 2011 grant [Member]	Sep. 30, 2012 March 7, 2011 grant [Member]	Sep. 30, 2011 March 7, 2011 grant [Member]	Dec. 31, 2011 March 7, 2011 grant [Member]	Sep. 30, 2012 prior to March 7, 2011 grant [Member]	Jun. 30, 2012 prior to March 7, 2011 grant [Member]	Sep. 30, 2012 prior to March 7, 2011 grant [Member]	Sep. 30, 2012 DSUs [Member]	Dec. 31, 2011 DSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Phantom shares vested													24,864
Number of phantom shares paid											6,061	18,803
Price per share paid for phantom shares											$ 4.28	$ 5.08
Liability reduced											$ 0.1		$ 0.1
Common stock price			$ 5.18	$ 4.70
Unrecognized compensation liability total						0.1		0.1		0.1
Share based compensation expense related to SARs And Phantom shares issued and earned					1.6	0	(0.4)	0.1	(1.2)
Share-Based Compensation Arrangements (Textual) [Abstract]
Vested Period								3 years					3 years
Additional Expenses Would have been Recorded on Achievement of Threshold Level of Performance					0.3				0
Expected life (years)	7 years
Other Deferred Compensation Arrangements, Liability, Current														$ 0.7	$ 0.1
Share Based Compensation Arrangement By Share Based Payment Award Vesting Portion		33.33%