Employee Benefit Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Compensation to the plans	60.00%
Minimum age for IRS catch up provision limit	50 years
Vesting percentage	100.00%
Matching contribution, Amount	$ 349	$ 335	$ 334
Severance indemnities paid to the pension fund	1/13.5 of the gross salary
Minimum [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Compensation to the plans	1.00%
Award for employees	25 years
Maximum [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Award for employees	40 years