Components of Interest Expense, Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Interest Income Expense Net [Line Items]
Interest expense	$ (3,633)	$ (3,427)
Interest income	10	10
Interest expense, net	$ (3,623)	$ (3,417)