Defined Benefit Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit pension plans	3
Number of 401K Plans	2
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Contribution and benefit payments	$ 1,161
Additional Contribution to plans	1,321
SERP
Defined Benefit Plan Disclosure [Line Items]
Number of executive officers	3
Number of former executive officers	2
Contribution and benefit payments	134
Additional Contribution to plans	$ 542