Segment Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Number of operating business segments	3
Amount of revenue from major customer of total revenue	$ 357,240	$ 341,684	$ 321,122
Major Customer | Sales Revenue, Net
Segment Reporting Information [Line Items]
Amount of revenue from major customer of total revenue	$ 163,800	$ 151,400	$ 147,100
Revenue from next largest customer, percentage of total revenue	46.00%	44.00%	46.00%
Puerto Rico | Sales Revenue, Net
Segment Reporting Information [Line Items]
Revenue from next largest customer, percentage of total revenue	11.00%	9.00%	11.00%