v2.3.0.11
Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash dividends, per share (in dollars per share) 0.23  
Capital Stock
   
Capital contribution from Genco for exchange, shares   100
Common Stock
   
Issuance of common stock   16,300,000
Issuance of nonvested common stock 12,500 478,500
Class B Stock
   
Capital contribution from Genco for exchange, shares   5,699,088