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Schedule I - Condensed Financial Information Of Registrant (Unconsolidated Statements Of Common Shareholders' Deficit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance $ 151,271 $ 47,774 $ (3,219)
Net income applicable to common stock 56,311 74,755 60,836
Distributions to AES (69,487) (78,400) (59,500)
Issuance of common stock 214,366    
Contributions from AES   106,400 49,091
Other 472 742 566
Ending Balance 352,933 151,271 47,774
Ipalco Enterprises, Inc. [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 151,271 47,774 (3,219)
Net income applicable to common stock 56,311 74,755 60,836
Distributions to AES (69,487) (78,400) (59,500)
Issuance of common stock 214,366    
Contributions from AES   106,400 49,091
Other 472 742 566
Ending Balance 352,933 151,271 47,774
Paid In Capital [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 168,610 61,468 11,811
Issuance of common stock 214,366    
Contributions from AES   106,400 49,091
Other 472 742 566
Ending Balance 383,448 168,610 61,468
Paid In Capital [Member] | Ipalco Enterprises, Inc. [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 168,610 61,468 11,811
Issuance of common stock 214,366    
Contributions from AES   106,400 49,091
Other 472 742 566
Ending Balance 383,448 168,610 61,468
Accumulated Deficit [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (17,339) (13,694) (15,030)
Net income applicable to common stock 56,311 74,755 60,836
Distributions to AES (69,487) (78,400) (59,500)
Ending Balance (30,515) (17,339) (13,694)
Accumulated Deficit [Member] | Ipalco Enterprises, Inc. [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (17,339) (13,694) (15,030)
Net income applicable to common stock 56,311 74,755 60,836
Distributions to AES (69,487) (78,400) (59,500)
Ending Balance $ (30,515) $ (17,339) $ (13,694)