Depreciation and Amortization Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Depreciation classified as:
Cost of revenues	$ 3,268	$ 3,447	$ 9,505	$ 10,022
Operating expenses	73	99	250	301
Total continuing operations	3,341	3,546	9,755	10,323
Depreciation and amortization classified as discontinued operations		164		791
Total	$ 3,341	$ 3,710	$ 9,755	$ 11,114