Business Segments Information - Schedule of Reconciliation of Segment Adjusted EBITDA to Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net (loss) income attributable to ADS	$ (226,356)	$ 32,280
Interest expense	5,264	3,802
Income tax expense	22,370	14,284
Loss on disposal of assets and costs from exit and disposal activities	(707)	(1,104)
Domestic [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net (loss) income attributable to ADS	(225,291)	30,589
Depreciation and amortization	14,803	15,953
Interest expense	5,188	3,757
Income tax expense	17,430	13,257
Segment EBITDA	(187,870)	63,556
Loss on disposal of assets and costs from exit and disposal activities	435	1,009
ESOP and stock-based compensation expense	7,425	5,580
ESOP special dividend compensation	246,752
Transaction costs	4,207	256
Strategic growth and operational improvement initiatives	2,195
Other adjustments	1,184	(1,569)
Segment Adjusted EBITDA	74,328	68,832
International Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net (loss) income attributable to ADS	(2,160)	3,062
Depreciation and amortization	1,891	1,874
Interest expense	76	45
Income tax expense	4,940	1,027
Segment EBITDA	4,747	6,008
Loss on disposal of assets and costs from exit and disposal activities	272	95
Transaction costs	38
Other adjustments	911	208
Segment Adjusted EBITDA	$ 5,968	$ 6,311