Summary of Future Purchase Obligations and Minimum Rental Commitments for Leasehold Properties and Operating Leases with Non-Cancelable Terms (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Other Commitments [Line Items]
2014	$ 2,629
2015	1,430
2016	35
Operating Leases, Future Minimum Payments Due, Total	4,094
Minimum rental commitments for leasehold properties
Other Commitments [Line Items]
2014	728
2015	151
2016	35
Operating Leases, Future Minimum Payments Due, Total	914
Commitments for other lease obligations
Other Commitments [Line Items]
2014	1,681
2015	1,279
2016
Operating Leases, Future Minimum Payments Due, Total	2,960
Other purchase obligations
Other Commitments [Line Items]
2014	220
2015
2016
Operating Leases, Future Minimum Payments Due, Total	$ 220