Reconciliation of Basic Weighted Shares Outstanding to Diluted Weighted Average Shares Outstanding (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Basic weighted average shares outstanding	63,075,122	63,075,122	63,075,122	63,075,122
Effect of dilutive securities - warrants		2,594,298		1,372,384
Diluted weighted average shares outstanding	63,075,122	65,669,420	63,075,122	64,447,506