Fair Value Measurements (Details) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended														1 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member]	Sep. 30, 2012 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2012 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Sep. 30, 2012 Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2012 Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Sep. 30, 2012 Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2012 Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Sep. 30, 2012 Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2012 Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Apr. 30, 2013 Grupo Finmart [Member]
Financial assets that are measured at fair value on a recurring basis
Marketable equity securities						$ 2,910,000	$ 4,631,000	$ 4,520,000	$ 2,910,000	$ 4,631,000	$ 4,520,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Forward contracts						2,395,000						2,395,000			0
Contingent consideration						(11,178,000)	(23,432,000)	(23,270,000)	0	0	0	0	0	0	(11,178,000)	(23,432,000)	(23,270,000)
Temporary Equity, Redemption Value						(56,837,000)	(53,681,000)	(44,864,000)	0	0	0	0	0	0	(56,837,000)	(53,681,000)	(44,864,000)
Net financial assets (liabilities)						(62,710,000)	(72,482,000)	(63,614,000)	2,910,000	4,631,000	4,520,000	2,395,000	0	0	(68,015,000)	(77,113,000)	(68,134,000)
Gross unrealized losses	1,500,000	1,500,000		1,500,000
Accretion expense		100,000	300,000	400,000	300,000
Cash payment of contingent consideration																		12,000,000
Additional contingent consideration	$ 200,000