Restructuring and Other Charges Narrative (Detail) (USD $)	3 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 747,000		$ 4,670,000
Accelerated amortization of prior pension losses			100,000
Expected restructuring cost to be paid in the next twelve months		800,000
Polycold Manufacturing Operation
Restructuring Cost and Reserve [Line Items]
Expected severance cost	1,300,000
Severance cost	800,000
Workforce-related
Restructuring Cost and Reserve [Line Items]
Restructuring charges	741,000		4,092,000
Facilities and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6,000		$ 578,000