Fair Value Measurement Fair Value Measurement - Additional Information (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended			1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013 security	Jan. 31, 2014 RIMCO right store	Sep. 30, 2014 RIMCO	Sep. 30, 2014 RIMCO	Dec. 31, 2013 RIMCO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of stores sold during period				27
Number of franchise rights sold during period				5
Proceeds from dispositions of business	$ 15,773	$ 2,151		$ 10,000
Asset impairment charges							766
Net loss on disposition of business					$ 0	$ 838
Number of securities in unrealized loss position			18
Number of securities			48