XML 15 R54.htm IDEA: XBRL DOCUMENT v2.4.0.6
Income Taxes (Narrative) (Detail)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Income Tax Disclosure [Abstract]    
Effective tax benefit rate 19.30% 11.50%
Federal statutory rate 35.00% 35.00%