Income Taxes (Components of Benefit from Income Taxes) (Detail) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 1,000,000		$ (2,800,000)
Domestic Tax Expense (Benefit)	4,710,000	25,712,000	8,505,000	8,136,000
Foreign	2,249,000	1,278,000	7,826,000	10,967,000
Provision for income taxes	$ 6,959,000	$ 26,990,000	$ 16,331,000	$ 19,103,000
Effective tax rate	(14.70%)	(338.10%)	(12.30%)	(29.90%)