Annual report pursuant to Section 13 and 15(d)

Leases - Future Minimum Lease Payments Under Non-Cancellable Leases (Parenthetical) (Detail)

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Leases - Future Minimum Lease Payments Under Non-Cancellable Leases (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Leases [Abstract]  
Present value of net minimum capital lease payments, currently payable $ 207us-gaap_CapitalLeaseObligationsCurrent