XML 66 R50.htm IDEA: XBRL DOCUMENT v3.10.0.1
Earnings per Share Earnings per share narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Sep. 30, 2017
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2013
Dec. 31, 2017
Oct. 16, 2017
Apr. 10, 2013
Mar. 01, 2013
Sep. 11, 2012
Mar. 15, 2007
Debt Conversion [Line Items]                          
Preferred Stock, Shares Authorized 2,000,000       2,000,000     2,000,000          
Preferred Stock, Par or Stated Value Per Share $ 0.01       $ 0.01     $ 0.01          
Preferred Stock, Dividend Rate, Percentage         9.75%                
Preferred Stock, Shares Issued 0       0     2,000         4,000
Depositary shares issued                         4,000,000
Preferred shares redeemed                 2,000 2,000      
Depositary shares redeemed                 2,000,000 2,000,000      
Payments for Repurchase of Redeemable Preferred Stock             $ 50,400 $ 50,420          
Preferred Stock, Redemption Price Per Share       $ 609.375   $ 609.375              
Preferred Dividends $ 0     $ (1,219) $ 0 $ (2,438)              
2017 Convertible Senior Notes [Member]                          
Debt Conversion [Line Items]                          
Convertible Subordinated Debt                       $ 57,500  
Debt Instrument, Interest Rate, Stated Percentage                       3.25%  
Stock Issued During Period, Shares, Other     2,400,000                    
Debt Instrument, Convertible, Conversion Price                       $ 23.80  
2018 Convertible Senior Notes [Member]                          
Debt Conversion [Line Items]                          
Convertible Subordinated Debt                     $ 86,250    
Debt Instrument, Interest Rate, Stated Percentage                     3.00%    
Debt Instrument, Convertible, Conversion Price                     $ 32.31    
Debt Conversion, Converted Instrument, Amount   $ 20,309                      
Debt Conversion, Converted Instrument, Shares Issued   629,000                      
Repayments of Convertible Debt   $ 65,941