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Taxation - Valuation Allowances (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 1,868	$ 1,327	$ 1,102
Charged to costs and expenses	0	0	0
(Deductions)/Other	(35)	541	225
Balance at end of period	$ 1,833	$ 1,868	$ 1,327

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.