Stock-Based Compensation Plans - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended
	May 30, 2013	Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Approval date of 2007 Stock Award and Incentive Plan		Apr. 20, 2007
Issuance of additional options	5,000,000
Issuance of aggregate shares		8,265,562
New shares issued under the plan		7,500,000
Shares transferred from 2000 Stock Option Plan		364,492
Shares transferred to 2007 plan from Directors Stock Plan		401,070
Shares available for future grants		4,968,766
Total compensation expense for share-based payment awards		$ 40,000
Total unrecognized estimated compensation expense related to non-vested stock options granted		100,000
Stock plan expected to be recognized over a weighted-average period		1 year
Exercise of options, Shares/Options exercised		0
Tax benefit		$ (1,684,000)
Options issued		0