Taxation - Summary of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	$ 39	$ 505	$ 664
Increases in positions taken in a prior period	0	0	0
Decreases in positions taken in a prior period	0	0	0
Increases in positions taken in a current period	65	39	117
Decreases in positions taken in a current period	0	0	0
Decreases due to settlements	(39)	(202)	0
Decreases due to lapse of statute of limitations	0	(303)	(276)
Balance at end of period	$ 65	$ 39	$ 505