Subsequent Events (Details) (USD $) In Thousands, unless otherwise specified		1 Months Ended
	Mar. 31, 2012	Apr. 30, 2012 Grupo Store installment year day
Subsequent Events
Purchase price	$ 8,818	$ 80,000
Purchase price, net of cash acquired		77,000
Portion of purchase price for acquisition that was deposited in escrow		11,000
Portion of escrow deposits representing cash and cash equivalents due to the former owners		3,000
Period to pay cash and cash equivalents due to former owners subsequent to confirmation of cash amount by IMI (in days)		15
Period to pay cash and cash equivalents due to former owners subsequent to closing date (in days)		45
Portion of escrow deposits securing indemnification obligations of Sellers		$ 8,000
Number of annual installments in which any escrow amount not distributed to sellers or Company will be released to the sellers		4
Period from closing date after which amount not distributed to sellers or IMI will be released to sellers		2