Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets:
U.S. and foreign government obligations	$ 6,296	$ 1,595
Foreign exchange contracts	30	255
Assets	57,671	57,206
Liabilities:
Foreign exchange contracts	315	9
Lease exit liabilities	11,001	12,550
Total Liabilities	11,316	12,559
Bank time deposits
Assets:
Assets	51,345	46,881
Bankers' acceptances
Assets:
Assets		8,475
Level 2
Assets:
U.S. and foreign government obligations	6,296	1,595
Foreign exchange contracts	30	255
Assets	57,671	57,206
Liabilities:
Foreign exchange contracts	315	9
Total Liabilities	315	9
Level 2 | Bank time deposits
Assets:
Assets	51,345	46,881
Level 2 | Bankers' acceptances
Assets:
Assets		8,475
Level 3
Liabilities:
Lease exit liabilities	11,001	12,550
Total Liabilities	$ 11,001	$ 12,550