General form of registration statement for all companies including face-amount certificate companies

Stockholders' Equity (Detail) - Valuation Model Assumptions

v2.3.0.11
Stockholders' Equity (Detail) - Valuation Model Assumptions
 6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dividend yield 0.00% 0.00% 0.00% 0.00%
Expected Volatility 45.20%   44.81%  
Risk free Interest rates 0.93%      
Risk free Interest rates 1.13%      
Expected lives (years) 6 years   6 years