Basis of Presentation - Revision of Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Consolidated Balance Sheets
Goodwill	$ 1,186,571	$ 1,104,090
Total assets	4,887,397	4,854,479
Deferred income taxes	677,966	663,023
Total liabilities	3,374,931	3,397,992
Capital in excess of par	1,529,906	1,542,584
Retained earnings		16,682
Accumulated other comprehensive loss	(120,951)	(102,779)
Total shareholder's equity	1,408,955	1,456,487
Total liabilities and shareholder's equity	4,887,397	4,854,479
As Reported
Consolidated Balance Sheets
Goodwill	1,200,501	1,118,020
Total assets	4,901,327	4,868,409
Deferred income taxes	723,201	701,694
Total liabilities	3,420,166	3,436,663
Capital in excess of par	1,507,408	1,542,584
Retained earnings		(1,136)
Accumulated other comprehensive loss	(129,758)	(109,702)
Total shareholder's equity	1,377,650	1,431,746
Total liabilities and shareholder's equity	4,901,327	4,868,409
Adjustment
Consolidated Balance Sheets
Goodwill	(13,930)	(13,930)
Total assets	(13,930)	(13,930)
Deferred income taxes	(45,235)	(38,671)
Total liabilities	(45,235)	(38,671)
Capital in excess of par	22,498
Retained earnings		17,818
Accumulated other comprehensive loss	8,807	6,923
Total shareholder's equity	31,305	24,741
Total liabilities and shareholder's equity	$ (13,930)	$ (13,930)