v3.2.0.727
Equity Transactions (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Mar. 31, 2011
Jun. 30, 2015
Jun. 30, 2014
Sep. 30, 2014
Jun. 30, 2015
Dec. 31, 2014
Mar. 09, 2015
Mar. 05, 2015
Dec. 31, 2013
Mar. 30, 2011
Mar. 29, 2011
Class of Stock [Line Items]                                  
CASH DIVIDEND DECLARED PER COMMON SHARE $ 0.20 $ 0.20 $ 0.20 $ 0.20 $ 0.20 $ 0.10   $ 0.40 $ 0.30     $ 0.70          
Noncontrolling Interest, Increase from Business Combination               $ (2,551) $ (2,550)                
Noncontrolling Interest in Variable Interest Entity $ 8,520   $ 7,349   $ 6,237     8,520 6,237   $ 8,520 $ 7,349     $ 5,170    
Net Income (Loss) Attributable to Noncontrolling Interest (647)       (789)     (1,380) (1,483)                
Equity Transactions [Roll Forward]                                  
Balance as of December 31, 2011   $ 468,328   $ 594,087   $ 528,650   468,328 528,650 $ 528,650 594,087 528,650          
NET INCOME 32,602       78,901     61,667 77,040                
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax 13       770     8 382                
Adjustments Related to Tax Withholding for Share-based Compensation               9,557 2,814                
Balance as of September 30, 2012 484,311   468,328   594,087     484,311 594,087   484,311 468,328          
Dividends, Common Stock, Cash 7,243 7,232 7,500 $ 7,666 8,033 $ 3,954   14,475 11,987 $ 19,653   27,153          
Proceeds from Issuance of Warrants               42,881 0                
Proceeds from Stock Options Exercised               26 353                
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities               2,163 1,196                
Share-based Compensation               6,299 9,721                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 492,831   $ 475,677   600,324     492,831 600,324   492,831 $ 475,677          
Convertible Debt [Member] | Equity [Member]                                  
Equity Transactions [Roll Forward]                                  
Class of Warrant or Right, Outstanding                         600 3,800   500 3,500
Warrant Option Strike Price                           $ 88.46     $ 63.44
Note Warrant2 [Member]                                  
Equity Transactions [Roll Forward]                                  
Proceeds from Issuance of Warrants   37,300         $ 27,600                    
Class of Warrant or Right [Domain]                                  
Equity Transactions [Roll Forward]                                  
Proceeds from Issuance of Warrants   $ 5,600         $ 4,100                    
2014 Repurchase Program [Domain]                                  
Class of Stock [Line Items]                                  
Stock Repurchase Program, Authorized Amount $ 400,000       $ 300,000     $ 400,000 $ 300,000   $ 400,000            
Treasury Stock Acquired, Repurchase Authorization 100                                
Stock Repurchased During Period, Shares               1,317     4,871 3,554          
Accelerated Share Repurchases, Initial Price Paid Per Share               $ 53.61                  
Equity Transactions [Roll Forward]                                  
Stock Repurchased During Period, Value               $ 70,572     $ 223,197 $ 152,625          
2014 Repurchase Program [Domain] | Repurchases related to 2020 Notes [Member]                                  
Class of Stock [Line Items]                                  
Stock Repurchased During Period, Shares               800