XML 104 R74.htm IDEA: XBRL DOCUMENT v2.4.0.8
Supplemental Cash Flow Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Cash Flow Supplemental Disclosures [Line Items]      
Converted instrument amount $ 1.8 $ 0.4  
Interest payments 2.9 0.8 0.4
Cash paid for taxes 0 0 0
Convertible Senior Debentures due 2014 [Member]
     
Cash Flow Supplemental Disclosures [Line Items]      
Interest payments   $ 4.8 $ 4.8