Summary of Significant Accounting Policies Balance sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Consolidated Balance sheet
Inventories	$ 844,223	$ 856,934
Deferred income taxes	56,194	26,242
Other current assets	59,831	64,761
Total current assets	1,462,291	1,263,126
Goodwill	1,104,090	1,149,352	$ 1,246,872
Total assets	4,854,479	4,809,479
Deferred income taxes	663,023	676,093
Total liabilities	3,397,992	3,278,160
Retained earnings (Accumulated deficit)	16,682	(613)
Accumulated other comprehensive income (loss)	(102,779)	(29,082)	(14,401)	$ (19,711)
Total shareholder's equity	1,456,487	1,531,319	$ 1,646,127	1,718,790
Total liabilities and shareholder's equity	4,854,479	4,809,479
As Reported
Consolidated Balance sheet
Inventories	844,223	853,226
Deferred income taxes	56,194	28,915
Other current assets	59,831	61,509
Total current assets	1,462,291	1,258,839
Goodwill	1,118,020	1,163,282
Total assets	4,868,409	4,819,122
Deferred income taxes	701,694	707,962
Total liabilities	3,436,663	3,310,029
Retained earnings (Accumulated deficit)	(1,136)	(22,718)
Accumulated other comprehensive income (loss)	(109,702)	(29,203)
Total shareholder's equity	1,431,746	1,509,093		$ 1,705,232
Total liabilities and shareholder's equity	4,868,409	4,819,122
Adjustment
Consolidated Balance sheet
Goodwill	(13,930)
Total assets	(13,930)
Deferred income taxes	(38,671)
Total liabilities	(38,671)
Retained earnings (Accumulated deficit)	17,818
Accumulated other comprehensive income (loss)	6,923
Total shareholder's equity	24,741
Total liabilities and shareholder's equity	$ (13,930)
Original revision
Consolidated Balance sheet
Inventories		3,708
Deferred income taxes		(2,673)
Other current assets		3,252
Total current assets		4,287
Total assets		4,287
Retained earnings (Accumulated deficit)		4,287
Total shareholder's equity		4,287
Total liabilities and shareholder's equity		4,287
Deferred tax revision
Consolidated Balance sheet
Goodwill		(13,930)
Total assets		(13,930)
Deferred income taxes		(31,869)
Total liabilities		(31,869)
Retained earnings (Accumulated deficit)		17,818
Accumulated other comprehensive income (loss)		121
Total shareholder's equity		17,939
Total liabilities and shareholder's equity		$ (13,930)