XML 37 R75.htm IDEA: XBRL DOCUMENT v2.4.0.6
Common And Preferred Stock (Narrative) (Details) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2010
Mar. 31, 2012
Minimum [Member]
Mar. 31, 2012
Maximum [Member]
Nov. 30, 2009
2009 Program [Member]
Nov. 30, 2011
2011 Program [Member]
Mar. 31, 2012
Equity Program Remaining Authorization [Member]
2011 Program [Member]
Mar. 31, 2012
Series A Junior Participating Preferred Stock [Member]
Mar. 31, 2011
Series A Junior Participating Preferred Stock [Member]
Mar. 31, 2012
Series B 6.75% Convertible Perpetual Preferred Stock [Member]
Mar. 31, 2011
Series B 6.75% Convertible Perpetual Preferred Stock [Member]
Mar. 31, 2010
Series B 6.75% Convertible Perpetual Preferred Stock [Member]
Mar. 31, 2009
Series B 6.75% Convertible Perpetual Preferred Stock [Member]
Mar. 31, 2006
Series B 6.75% Convertible Perpetual Preferred Stock [Member]
Class of Stock [Line Items]                              
Common stock, shares authorized 100,000,000                            
Common stock, shares issued 23,257,175                            
Authorized for repurchase of outstanding common shares $ 4,004,000 $ 46,929,000 $ 32,194,000     $ 150,000,000 $ 100,000,000                
Stock repurchased during period, value 3,488,000 46,696,000 32,942,000     70,000,000   100,000,000              
Weighted-average cost per share $ 43.49 $ 41.95 $ 44.28     $ 44.02                  
Number of shares repurchased 80,191 1,113,125 743,876     1,589,701                  
Preferred stock, shares authorized 5,000,000               500,000 500,000 220,000 220,000      
Preferred stock, shares issued                 0 0 219,999 219,999     220,000
Preferred stock, shares outstanding                 0 0 219,999 219,999 219,999 219,999  
Dividend common stock       $ 0.43                      
Preferred stock liquidation price $ 1,000                            
Common stock program expiration date           Nov. 01, 2011 Nov. 15, 2013                
Series B 6.75% convertible perpetual preferred stock, quarterly dividend rate 6.75%                            
Preferred stock exceeding percentage on closing price 135.00%                            
Preferred stock, conversion period       March 15, 2013 March 15, 2018                    
Preferred stock, conversion rate 21.7365                            
Preferred shares, conversion price $ 46.01