Employee Benefit Plans - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands		3 Months Ended											12 Months Ended
	Jan. 06, 2014	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2015	Mar. 31, 2014		Mar. 31, 2013
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Dividend per share declared		$ 0.040	$ 0.040	$ 0.000	$ 0.000	$ 0.029	$ 0.029	$ 0.029	$ 0.026	$ 0.026	$ 0.026	$ 0.026	$ 0.08	$ 1.68	[1]	$ 0.10	[1]
Compensation expense related to allocation of ESOP shares													$ 12,144,000	$ 7,891,000		$ 7,283,000
ESOP directed to the Plan trustee		$ 824,000											$ 824,000	$ 23,614,000
Redeemable Convertible Preferred Stock [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee stock ownership plan number of shares approved by the board of directors to the plan		737											737	734
Employee stock ownership plan allocated as shares		7,914											7,914	7,668
Special Dividend [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Dividend per share declared	$ 1.59
Dividend, total amount	$ 108,101,000
Compensation expense related to allocation of ESOP shares														$ 22,624,000
Special Dividend [Member] | Cost of Goods Sold [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Compensation expense related to allocation of ESOP shares														13,896,000
Special Dividend [Member] | Selling Expenses [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Compensation expense related to allocation of ESOP shares														4,550,000
Special Dividend [Member] | General and Administrative Expense [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Compensation expense related to allocation of ESOP shares														$ 4,178,000
Dividend Declared [Member] | Redeemable Convertible Preferred Stock [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee stock ownership plan allocated as shares		6											6	11
Profit-Sharing Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Contribution to the profit sharing plan													$ 0	$ 0		$ 0
Employee Stock Ownership Plan E S O P Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee stock ownership plan participation description													Employees of ADS who have reached the age of 18 are generally eligible to participate in the Plan on March 31 after six months of service.
Employee stock ownership plan stock ownership description													Upon attainment of age 50 and seven years of participation in the Plan, a participant may elect to diversify specified percentages of the number of shares of ADS stock credited to the participant's ESOP stock account in compliance with applicable law.
Employee Stock Ownership Plan E S O P Plan [Member] | ADS [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Debt instrument , term													30 years

[1] See Note 2. Restatement of Previously Issued Financial Statements.