Correction of Immaterial Errors Correction of Immaterial Errors (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Correction of Immaterial Errors (Details) [Abstract]
Overstatement of on rent merchandise				$ 14.5
Understatement of held for rent merchandise				1.2
Understatement of receivables				4.0
Understatement of salaries and other expenses	0.8	0.2	0.5	2.8	1.8
Overstatement of net earnings	0.5	0.1	0.3	1.8	1.2
Decrease in retained earnings						$ 3.0