Fair Value Measurement Fair Value Measurement - Additional Information (Details) (USD $)	3 Months Ended			1 Months Ended	3 Months Ended
	Mar. 31, 2014 securities	Mar. 31, 2013	Dec. 31, 2013 securities	Jan. 31, 2014 RIMCO store right	Mar. 31, 2014 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	$ 13,295,000	$ 0			$ 10,000,000
Asset impairment charges					766,000
Net loss on disposition of business					$ 718,000
Number of securities in unrealized loss position	8		18
Number of securities	44		48