DEFINED BENEFIT PENSION EXPENSE (Detail) - Summary of defined benefit pension expense (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Service cost	$ 48		$ 51	$ 98	$ 123
Interest cost	2,422		2,666	4,847	5,568
Expected return on plan assets	(3,136)		(2,930)	(6,274)	(5,732)
Amortization:
Prior service cost	5		84	10	168
Recognized actuarial loss	840		718	1,680	1,293
Loss on pension settlement		2,142	0	2,142
Net periodic expense	$ 179		$ 589	$ 2,503	$ 1,420