Geographic Segment Information Based on Geographic Location of Subsidiaries (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012		Dec. 31, 2011
Revenues
Revenues	$ 89,175	$ 84,372	$ 176,514	$ 166,860	$ 341,684	[1]	$ 321,122	[1]
PUERTO RICO
Revenues
Revenues					294,479	[1]	281,392	[1]
Caribbean
Revenues
Revenues					16,280	[1]	13,051	[1]
Latin America
Revenues
Revenues					$ 30,925	[1]	$ 26,679	[1]

[1] Revenues are based on subsidiaries' country of domicile.