Reconciliation of Basic Weighted Shares Outstanding to Diluted Weighted Average Shares Outstanding (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 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		1,426,251		1,390,681
Diluted weighted average shares outstanding	63,075,122	64,501,373	63,075,122	64,465,803