XML 74 R59.htm IDEA: XBRL DOCUMENT v3.10.0.1
COMMON STOCK EQUITY - CHANGE IN COMMON STOCK EQUITY (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance as of beginning of period (shares)     86,555,507  
Balance as of beginning of period     $ 1,236,643  
Net income $ (14,274) $ 18,957 249,691 $ 168,588
Other comprehensive income $ (2,092) $ (3,304) (12,624) $ 4,254
Common stock issued:        
Incentive plan     $ 16,537  
Dividend reinvestment plan (in shares) 92,000 102,000 334,000 381,000
Dividend reinvestment plan     $ 13,397  
Waiver discount (in shares) 460,000   1,014,000  
Waiver discount     $ 41,677  
Cash dividend ($.8175 per share)     (71,755)  
Treasury stock and other     $ (23,604)  
Balance as of end of period (shares) 88,211,744   88,211,744  
Balance as of end of period $ 1,449,962   $ 1,449,962  
Cash dividend declared per share (usd per share) $ 0.2725 $ 0.255 $ 0.8175 $ 0.765
Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance as of beginning of period (shares)     86,556,000  
Balance as of beginning of period     $ 222,258  
Common stock issued:        
Incentive plan (in shares)     558,000  
Incentive plan     $ 1,396  
Dividend reinvestment plan (in shares)     334,000  
Waiver discount (in shares)     1,014,000  
Waiver discount     $ 2,535  
Treasury stock and other (shares)     (250,000)  
Balance as of end of period (shares) 88,212,000   88,212,000  
Balance as of end of period $ 226,189   $ 226,189  
Premium on Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance as of beginning of period     219,696  
Common stock issued:        
Incentive plan     15,141  
Dividend reinvestment plan     173  
Waiver discount     39,142  
Treasury stock and other     (14)  
Balance as of end of period 274,138   274,138  
Accumulated Other Comprehensive (Loss) Income        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance as of beginning of period (13,788) $ (7,597) (3,256) $ (15,155)
Other comprehensive income     (12,624)  
Common stock issued:        
Balance as of end of period (15,880) $ (10,901) (15,880) $ (10,901)
Treasury Stock And Other        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance as of beginning of period     (70,039)  
Common stock issued:        
Dividend reinvestment plan     13,224  
Treasury stock and other     (23,590)  
Balance as of end of period (80,405)   (80,405)  
Retained Earnings        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance as of beginning of period     867,984  
Net income     249,691  
Common stock issued:        
Cash dividend ($.8175 per share)     (71,755)  
Balance as of end of period $ 1,045,920   $ 1,045,920