Fair Value Accounting - Schedule of Measure at Fair Value on Recurring Basis (Detail) - Measured at Fair Value on Recurring Basis $ in Thousands	Mar. 31, 2016 USD ($)
Defined Benefit Plan Disclosure
Short-term investments	$ 6,840
Interest rate derivatives	0
Net asset	6,840
Level 1
Defined Benefit Plan Disclosure
Short-term investments	982
Interest rate derivatives	0
Net asset	982
Level 2
Defined Benefit Plan Disclosure
Short-term investments	5,858
Interest rate derivatives	0
Net asset	$ 5,858