Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Paid-In Capital [Member]	Common Stock in Treasury [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings (Deficit) [Member]	Total ADS Stockholders' Equity [Member]	Non-controlling Interest in Subsidiaries [Member]
Beginning Balance, Value at Mar. 31, 2016	$ 202,489	$ 12,393	$ 739,097	$ (440,995)	$ (21,261)	$ (101,778)	$ 187,456	$ 15,033
Beginning Balance, Shares at Mar. 31, 2016		153,560		99,123
Net income	53,304					51,060	51,060	2,244
Other comprehensive income (loss)	(8,739)				(5,778)		(5,778)	(2,961)
Redeemable convertible preferred stock dividends	(1,131)					(1,131)	(1,131)
Common stock dividends	(9,880)					(9,880)	(9,880)
Allocation of ESOP shares to participants for compensation	1,944		1,944				1,944
Exercise of common stock options	5,602		4,554	$ 1,048			5,602
Exercise of common stock options, Shares				(236)
Restricted stock awards	368		161	$ 207			368
Restricted stock awards, Shares				(47)
ESOP distribution in common stock	6,391		4,641	$ 1,750			6,391
ESOP distribution in common stock, Shares				(394)
Accretion of redeemable noncontrolling interest	(713)		(713)				(713)
Ending Balance, Value at Dec. 31, 2016	249,635	$ 12,393	749,684	$ (437,990)	(27,039)	(61,729)	235,319	14,316
Ending Balance, Shares at Dec. 31, 2016		153,560		98,446
Beginning Balance, Value at Mar. 31, 2017	237,610	$ 12,393	755,787	$ (436,984)	(24,815)	(83,678)	222,703	14,907
Beginning Balance, Shares at Mar. 31, 2017		153,560		98,222
Net income	68,875					67,710	67,710	1,165
Other comprehensive income (loss)	3,010				3,882		3,882	(872)
Redeemable convertible preferred stock dividends	(1,310)					(1,310)	(1,310)
Common stock dividends	(11,729)					(11,729)	(11,729)
Dividend paid to noncontrolling interest holder	(490)							(490)
Allocation of ESOP shares to participants for compensation	1,910		1,910				1,910
Exercise of common stock options	7,606	$ 6	7,558	$ 42			7,606
Exercise of common stock options, Shares		559		(2)
Restricted stock awards	2,150		1,801	$ 349			2,150
Restricted stock awards, Shares		41		(78)
Reclassification of liability-classified awards	13,714		13,714				13,714
Stock-based compensation expense before related tax effects	2,991		2,991				2,991
ESOP distribution in common stock	9,530	$ 2	7,775	$ 1,753			9,530
ESOP distribution in common stock, Shares		192		(394)
Retirement of common stock held in treasury		$ (977)	(433,852)	$ 434,829
Retirement of common stock held in treasury, Shares		(97,745)		(97,745)
Common stock repurchases	(7,947)	$ (7,900)		$ (7,947)			(7,947)
Common stock repurchases, Shares		400		400
Ending Balance, Value at Dec. 31, 2017	$ 325,920	$ 11,424	$ 357,684	$ (7,958)	$ (20,933)	$ (29,007)	$ 311,210	$ 14,710
Ending Balance, Shares at Dec. 31, 2017		56,607		403