XML 83 R84.htm IDEA: XBRL DOCUMENT v2.4.0.6
Equity - Additional Information (Detail) (USD $)
 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Mar. 31, 2013
Awards issued prior to 2006
Period 1
Mar. 31, 2013
Awards issued prior to 2006
Period 2
Mar. 31, 2013
Awards issued prior to 2006
Period 3
Mar. 31, 2013
Awards issued during and after 2006
Jan. 31, 2009
8.5% Convertible perpetual preferred stock
Mar. 31, 2013
8.5% Convertible perpetual preferred stock
Mar. 31, 2012
8.5% Convertible perpetual preferred stock
Dec. 31, 2009
6.0% Convertible perpetual preferred stock
Mar. 31, 2013
6.0% Convertible perpetual preferred stock
Mar. 31, 2012
6.0% Convertible perpetual preferred stock
Nov. 30, 2010
7.0% Convertible perpetual preferred stock
Mar. 31, 2013
7.0% Convertible perpetual preferred stock
Mar. 31, 2012
7.0% Convertible perpetual preferred stock
Mar. 31, 2013
Treasury Stock
Mar. 31, 2012
Treasury Stock
Mar. 31, 2013
Stockholder Rights Plan
Series A Junior Participating Preferred Stock
Right
Mar. 31, 2013
Former President and Chief Operating Officer
Stockholders Equity Note [Line Items]                                        
Preferred stock, shares authorized (in shares) 50,000,000 50,000,000                                    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001                                    
Preferred stock, shares designated (in shares) 7,700,000 7,700,000                                    
Preferred stock, dividend rate, percentage               8.50% 8.50% 8.50% 6.00% 6.00% 6.00% 7.00% 7.00% 7.00%        
Preferred stock, liquidation preference (in dollars per share)               $ 100.00     $ 100.00     $ 100.00            
Preferred stock, number of common stock shares initially issuable upon conversion (in shares)               12.4805     9.2115     12.8791            
Preferred stock, annual dividend per share (in dollars per share)               $ 8.50     $ 6.00     $ 7.00            
Preferred stock, conversion start date               Feb. 20, 2014     Dec. 21, 2014     Nov. 20, 2015            
Preferred stock, conversion term               Each share of 8.5% convertible perpetual preferred stock has a liquidation preference of $100.00 and is convertible at the holder’s option at any time initially into approximately 12.4805 shares of the Company’s common stock, subject to customary adjustments in certain circumstances. Each holder of the convertible perpetual preferred stock is entitled to an annual dividend of $8.50 per share to be paid semi-annually in cash, common stock or a combination thereof, at the Company’s election. The 8.5% convertible perpetual preferred stock is not redeemable by the Company at any time. After February 20, 2014, the Company may cause all outstanding shares of the convertible perpetual preferred stock to convert automatically into common stock at the then-prevailing conversion rate if certain conditions are met.     Each share of the 6.0% convertible perpetual preferred stock has a liquidation preference of $100.00 and is entitled to an annual dividend of $6.00 payable semi-annually in cash, common stock or any combination thereof, at the Company’s election. The 6.0% convertible perpetual preferred stock is not redeemable by the Company at any time. Each share is initially convertible into approximately 9.2115 shares of the Company’s common stock, at the holder’s option, subject to customary adjustments in certain circumstances. On December 21, 2014, all outstanding shares of the 6.0% convertible preferred stock will be converted automatically into shares of the Company’s common stock at the then-prevailing conversion price as long as all dividends accrued at that time have been paid.     Each share of the 7.0% convertible preferred stock has a liquidation preference of $100.00 per share and became convertible at the holder’s option on February 15, 2011, initially into approximately 12.8791 shares of the Company’s common stock, subject to customary adjustments in certain circumstances. The annual dividend on each share of the 7.0% convertible preferred stock is $7.00 payable semi-annually, in cash, common stock or a combination thereof, at the Company’s election beginning on May 15, 2011. The 7.0% convertible perpetual preferred stock is not redeemable by the Company at any time. After November 20, 2015, the Company may cause all outstanding shares of the 7.0% convertible perpetual preferred stock to convert automatically into common stock at the then-prevailing conversion rate if certain conditions are met.            
Number of Rights issued per common share                                     1  
Right expiration date                                     Apr. 29, 2013  
Purchase of treasury stock (in shares)                                 1,800,000 800,000    
Purchase of treasury stock $ (11,216,000)                               $ (11,216,000) $ (6,400,000)    
Retirement of treasury stock (in shares)                                 1,800,000 800,000    
Retirement of treasury stock 0                               11,216,000 6,400,000    
Stockholder settlement gross   5,000,000                                    
Additional paid-in capital - stockholder receivable (5,000,000) (5,000,000)                                    
Restricted common stock under incentive compensation plans, vesting period (in years)       1 year 4 years 7 years 4 years                          
Stock-based compensation 18,900,000   10,500,000                                 7,600,000
Stock based compensation, capitalized $ 1,600,000   $ 1,900,000