XML 60 R44.htm IDEA: XBRL DOCUMENT v2.4.0.8
Long-Term Debt and Credit Facility, Textuals (Details) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended
Sep. 30, 2013
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Sep. 30, 2013
Convertible Notes
Days
Sep. 30, 2013
Convertible Notes
Mar. 29, 2010
Convertible Notes
Oct. 22, 2013
Call Options
Sep. 30, 2013
Call Options
Sep. 30, 2013
Warrant Transactions
Sep. 30, 2012
Warrant Transactions
Sep. 30, 2013
Senior Notes
Sep. 30, 2012
Senior Notes
Sep. 30, 2013
Senior Notes
Sep. 30, 2012
Senior Notes
May 23, 2012
Senior Notes
Sep. 30, 2013
Revolving Credit Facility
Sep. 30, 2013
Line of Credit
Sep. 30, 2013
Letter of Credit
Sep. 30, 2013
Minimum
Long-term debt                                        
Principal amount of notes $ 225,000,000 $ 225,000,000   $ 225,000,000     $ 175,000,000                 $ 225,000,000        
Interest rate             4.50%                 8.25%        
Interest expense including amortization of deferred financing costs                       4,800,000 4,900,000 14,500,000 7,000,000          
Payment of quarterly cash dividends $ 0.30 $ 0.90 $ 0.75                                 $ 0.24
Conversion rate of common stock shares per $1,000 of principal amount           20.7714                            
Principal amount in conversion feature         1,000 1,000                            
Conversion price per share of note         $ 48.14 $ 48.14                            
Threshold percentage of stock price trigger for conversion         130.00%                              
Trading days threshold for conversion         20                              
Consecutive trading days threshold for conversion         30 days                              
Common stock sold related to option counterparties net-share-settled warrants                   3.6                    
Exercise price per share of Call Options               $ 48.10 $ 48.14                      
Exercise price per share of Warrants                   61.14 61.32                  
Line of Credit Facility                                        
Maximum borrowing capacity                                 300,000,000      
Available borrowing capacity                                 263,900,000      
Outstanding line of credit                                   0 6,900,000  
Remaining available borrowing capacity                                 $ 257,000,000      
Interest on Revolving Credit Facility                                 4.00%