Benefit Obligation, Amounts Recognized Company's Financial Statements and Principal Assumptions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Change in projected benefit obligation:
Benefit obligation at beginning of year	$ 1,633	$ 1,142
Service cost	355	317
Interest cost	53	45
Paid pension distributions
Actuarial (gains)/losses	(193)	129
Past service cost
Net periodic benefit cost	215	491
Exchange rate impact
Benefit obligation at end of year	1,848	1,633
W.E.T
Change in projected benefit obligation:
Benefit obligation at beginning of year	5,392	4,250
Service cost		199
Interest cost	180	195
Paid pension distributions	(291)	(277)
Actuarial (gains)/losses	43	912
Past service cost	445
Net periodic benefit cost
Exchange rate impact	250	113
Benefit obligation at end of year	$ 6,019	$ 5,392