Advanced Drainage Systems (WMS) 10-K 30 May 17 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	May 05, 2017	Sep. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	WMS
Entity Registrant Name	ADVANCED DRAINAGE SYSTEMS, INC.
Entity Central Index Key	1,604,028
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		55,338,215
Entity Public Float			$ 1,049

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Current assets:
Cash	$ 6,450	$ 6,555
Receivables (less allowance for doubtful accounts of $10,431 and $7,956, respectively)	168,943	186,883
Inventories	258,430	230,466
Deferred income taxes and other current assets	6,743	15,658
Total current assets	440,566	439,562
Property, plant and equipment, net	406,858	391,744
Other assets:
Goodwill	100,566	100,885
Intangible assets, net	51,758	59,869
Other assets	46,537	45,256
Total assets	1,046,285	1,037,316
Current liabilities:
Current maturities of debt obligations	37,789	35,870
Current maturities of capital lease obligations	21,450	19,231
Accounts payable	121,922	119,606
Current portion of liability-classified stock-based awards	11,926	10,118
Other accrued liabilities	54,460	65,099
Accrued income taxes	8,207	2,260
Total current liabilities	255,754	252,184
Long-term debt obligation (less unamortized debt issuance costs of $1,723 and $3,131, respectively)	310,849	312,214
Long-term capital lease obligations	58,710	56,809
Deferred tax liabilities	44,007	63,952
Other liabilities	26,530	37,921
Total liabilities	695,850	723,080
Commitments and contingencies (see Note 14)
Mezzanine equity:
Redeemable convertible preferred stock: $0.01 par value; 47,070 shares authorized; 44,170 shares issued; 24,225 and 24,819 shares outstanding, respectively	302,814	310,240
Deferred compensation — unearned ESOP shares	(198,216)	(205,664)
Redeemable noncontrolling interest in subsidiaries	8,227	7,171
Total mezzanine equity	112,825	111,747
Stockholders’ equity:
Common stock: $0.01 par value; 1,000,000 shares authorized; 153,560 shares issued; 55,338 and 54,437 shares outstanding, respectively	12,393	12,393
Paid-in capital	755,787	739,097
Common stock in treasury, at cost	(436,984)	(440,995)
Accumulated other comprehensive loss	(24,815)	(21,261)
Retained deficit	(83,678)	(101,778)
Total ADS stockholders’ equity	222,703	187,456
Noncontrolling interest in subsidiaries	14,907	15,033
Total stockholders’ equity	237,610	202,489
Total liabilities, mezzanine equity and stockholders’ equity	$ 1,046,285	$ 1,037,316

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Allowance for doubtful accounts	$ 10,431	$ 7,956
Unamortized debt issuance costs	$ 1,723	$ 3,131
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	153,560,000	153,560,000
Common stock, shares outstanding	55,338,000	54,437,000
Redeemable Convertible Preferred Stock [Member]
Mezzanine equity, par value	$ 0.01	$ 0.01
Mezzanine equity, shares authorized	47,070,000	47,070,000
Mezzanine equity, shares issued	44,170,000	44,170,000
Mezzanine equity, shares outstanding	24,225,000	24,819,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales	$ 1,257,261	$ 1,290,678	$ 1,180,073
Cost of goods sold	961,451	1,005,326	974,960
Gross profit	295,810	285,352	205,113
Operating expenses:
Selling	91,475	88,478	80,481
General and administrative	110,950	92,504	75,855
Loss on disposal of assets and costs from exit and disposal activities	8,509	812	362
Intangible amortization	8,548	9,224	9,754
Income from operations	76,328	94,334	38,661
Other expense:
Interest expense	17,467	18,460	19,368
Derivative (gains) losses and other (income) expense, net	(5,970)	16,575	14,370
Income before income taxes	64,831	59,299	4,923
Income tax expense	24,615	23,498	6,284
Equity in net loss of unconsolidated affiliates	4,308	5,234	2,335
Net income (loss)	35,908	30,567	(3,696)
Less net income attributable to noncontrolling interest	2,958	5,515	4,131
Net income (loss) attributable to ADS	32,950	25,052	(7,827)
Change in fair value of redeemable convertible preferred stock			(11,054)
Accretion of redeemable noncontrolling interest	(1,560)	(932)
Dividends to redeemable convertible preferred stockholders	(1,646)	(1,425)	(661)
Dividends paid to unvested restricted stockholders	(73)	(24)	(11)
Net income (loss) available to common stockholders and participating securities	29,671	22,671	(19,553)
Undistributed income allocated to participating securities	(1,700)	(1,270)
Net income (loss) available to common stockholders	$ 27,971	$ 21,401	$ (19,553)
Weighted average common shares outstanding:
Basic	54,919	53,978	51,344
Diluted	55,624	55,176	51,344
Net income (loss) per share available to common stockholders:
Basic	$ 0.51	$ 0.40	$ (0.38)
Diluted	0.50	0.39	(0.38)
Cash dividends declared per share	$ 0.24	$ 0.20	$ 0.08

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 35,908	$ 30,567	$ (3,696)
Other comprehensive loss:
Currency translation	(5,037)	(8,594)	(11,928)
Comprehensive income (loss)	30,871	21,973	(15,624)
Less other comprehensive loss attributable to noncontrolling interest, net of tax	(1,483)	(2,854)	(3,237)
Less net income attributable to noncontrolling interest	2,958	5,515	4,131
Total comprehensive income (loss) attributable to ADS	$ 29,396	$ 19,312	$ (16,518)

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities
Net income (loss)	$ 35,908	$ 30,567	$ (3,696)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	72,355	71,009	65,472
Deferred income taxes	(8,971)	10,686	(18,762)
Loss on disposal of assets and costs from exit and disposal activities	7,316	812	362
ESOP, stock repurchase agreement and stock-based compensation	17,875	4,382	37,402
Amortization of deferred financing charges	1,408	1,412	1,410
Fair market value adjustments to derivatives	(10,921)	2,163	7,746
Loss on purchase of non-controlling interest		490
Equity in net loss of unconsolidated affiliates	4,308	5,234	2,335
Gain on bargain purchase of PTI acquisition	(609)
Other operating activities	(5,871)	7,243	(1,062)
Changes in working capital (see Note 22)	(8,559)	1,344	(16,828)
Net cash provided by operating activities	104,239	135,342	74,379
Cash Flows from Investing Activities
Capital expenditures	(46,676)	(44,942)	(32,080)
Proceeds from disposition of assets or businesses			538
Cash paid for acquisitions, net of cash acquired	(8,573)	(3,188)	(36,385)
Purchase of property, plant and equipment through financing	(4,620)
Investment in unconsolidated affiliates			(7,566)
Proceeds from note receivable to related party		3,854
Issuance of note receivable to related party		(3,854)
Other investing activities	(1,390)	(888)	(600)
Net cash used in investing activities	(61,259)	(49,018)	(76,093)
Cash Flows from Financing Activities
Proceeds from Revolving Credit Facility	412,400	409,100	389,200
Payments on Revolving Credit Facility	(382,600)	(448,200)	(432,200)
Payments on Term Loan	(10,000)	(8,750)	(6,250)
Payments on Senior Notes	(25,000)
Proceeds from notes, mortgages, and other debt	1,000	6,378
Payments of notes, mortgages, and other debt	(870)	(7,208)	(4,903)
Payments on loans against CSV life insurance policies	(6,823)		(872)
Equipment financing loans	4,620
Payments on capital lease obligations	(21,760)	(19,780)	(9,278)
Payments for deferred initial public offering costs			(6,479)
Proceeds from initial public offering of common stock, net of underwriter discounts and commissions			79,131
Cash dividends paid	(16,820)	(16,240)	(7,869)
Purchase of treasury stock — common			(3)
Proceeds from option exercises	4,011	1,765	1,986
Other financing activities	(983)	(29)	(672)
Net cash (used in) provided by financing activities	(42,825)	(82,964)	1,791
Effect of exchange rate changes on cash	(260)	(428)	(385)
Net change in cash	(105)	2,932	(308)
Cash at beginning of year	6,555	3,623	3,931
Cash at end of year	$ 6,450	$ 6,555	$ 3,623

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ 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, 2014	$ (453,039)	$ 11,957	$ 8,369	$ (448,439)	$ (6,830)	$ (36,680)	$ (471,623)	$ 18,584
Beginning Balance, Shares at Mar. 31, 2014		109,934,000		100,810,000
Net income (loss)	(3,696)					(7,827)	(7,827)	4,131
Other comprehensive loss	(11,928)				(8,691)		(8,691)	(3,237)
Redeemable convertible preferred stock dividends	(534)					(534)	(534)
Common stock dividend	(4,270)					(4,270)	(4,270)
Dividend paid to noncontrolling interest holder	(3,065)							(3,065)
Compensation	3,003		3,003				3,003
Dividend	(127)					(127)	(127)
Exercise of common stock options	9,539		8,491	$ 1,048			9,539
Exercise of common stock options, Shares				(235,000)
Redemption of common shares to exercise stock options			93	$ (93)
Redemption of common shares to exercise stock options, Shares				7,000
Tax benefit resulting from exercise of certain stock-based compensation awards	(4)		(4)				(4)
Restricted stock awards	6,599		5,856	$ 743			6,599
Restricted stock awards, Shares				(167,000)
Initial Public Offering (IPO)	72,196	$ 53	72,143				72,196
Initial Public Offering (IPO), Shares		5,289,000
Purchase of common stock	(3)			$ (3)			(3)
ESOP distributions in common stock	6,133		4,454	$ 1,679			6,133
ESOP distributions in common stock, Shares				(377,000)
Adjustments to redeemable convertible preferred stock fair value measurement	(11,054)		(13,077)			2,023	(11,054)
Adjustments to redeemable common stock fair value measurement	(65,921)					(65,921)	(65,921)
Termination of redemption feature upon IPO	615,040	$ 383	614,657				615,040
Termination of redemption feature upon IPO, Shares		38,320,000
Adjustments to redeemable common stock agreements	18,256		19,510			(1,254)	18,256
Adjustments to redeemable common stock agreements, Shares		17,000
Ending Balance, Value at Mar. 31, 2015	177,125	$ 12,393	723,495	$ (445,065)	(15,521)	(114,590)	160,712	16,413
Ending Balance, Shares at Mar. 31, 2015		153,560,000		100,038,000
Net income (loss)	30,132					25,052	25,052	5,080
Other comprehensive loss	(8,594)				(5,740)		(5,740)	(2,854)
Redeemable convertible preferred stock dividends	(1,293)					(1,293)	(1,293)
Common stock dividend	(10,815)					(10,815)	(10,815)
Dividend paid to noncontrolling interest holder	(3,606)							(3,606)
Compensation	3,577		3,577				3,577
Dividend	(132)					(132)	(132)
Exercise of common stock options	5,333		4,379	$ 954			5,333
Exercise of common stock options, Shares				(215,000)
Tax benefit resulting from exercise of certain stock-based compensation awards	194		194				194
Restricted stock awards	$ 891		582	$ 309			891
Restricted stock awards, Shares				(69,000)
Initial Public Offering (IPO), Shares		5,289,000
Purchase of common stock, Shares	0
ESOP distributions in common stock	$ 10,250		7,443	$ 2,807			10,250
ESOP distributions in common stock, Shares				(631,000)
Accretion of redeemable noncontrolling interest	(573)		(573)				(573)
Ending Balance, Value at Mar. 31, 2016	202,489	$ 12,393	739,097	$ (440,995)	(21,261)	(101,778)	187,456	15,033
Ending Balance, Shares at Mar. 31, 2016		153,560,000		99,123,000
Net income (loss)	35,186					32,950	32,950	2,236
Other comprehensive loss	(5,037)				(3,554)		(3,554)	(1,483)
Redeemable convertible preferred stock dividends	(1,512)					(1,512)	(1,512)
Common stock dividend	(13,204)					(13,204)	(13,204)
Dividend paid to noncontrolling interest holder	(879)							(879)
Compensation	2,254		2,254				2,254
Dividend	(134)					(134)	(134)
Exercise of common stock options	8,166		6,571	$ 1,595			8,166
Exercise of common stock options, Shares				(358,000)
Equity classified stock-based compensation expense before related tax effects	139		139				139
Tax benefit resulting from exercise of certain stock-based compensation awards	439		439				439
Reclassification of liability classified awards	220		220				220
Restricted stock awards	3,309		2,926	$ 383			3,309
Restricted stock awards, Shares				(86,000)
Purchase of common stock	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Purchase of common stock, Shares	0	0	0	0	0	0	0	0
ESOP distributions in common stock	$ 7,426		$ 5,393	$ 2,033			$ 7,426
ESOP distributions in common stock, Shares				(457,000)
Acquisition of redeemable noncontrolling interest	0	$ 0	0	$ 0	$ 0	$ 0	0	$ 0
Accretion of redeemable noncontrolling interest	(1,252)		(1,252)				(1,252)
Ending Balance, Value at Mar. 31, 2017	$ 237,610	$ 12,393	$ 755,787	$ (436,984)	$ (24,815)	$ (83,678)	$ 222,703	$ 14,907
Ending Balance, Shares at Mar. 31, 2017		153,560,000		98,222,000

Consolidated Statements of Sto8

Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) - $ / shares	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Statement Of Stockholders Equity [Abstract]
Common stock dividend per share	$ 0.24	$ 0.20	$ 0.08

Consolidated Statements of Mezz

Consolidated Statements of Mezzanine Equity - USD ($) $ in Thousands	Total	Redeemable Non-controlling Interest [Member]	Redeemable Common Stock	Redeemable Convertible Preferred Stock [Member]	Deferred Compensation - Unearned ESOP Shares [Member]	Total Mezzanine Equity [Member]
Beginning Balance, Value at Mar. 31, 2014			$ 549,359	$ 291,720	$ (197,888)	$ 643,191
Beginning Balance, Shares at Mar. 31, 2014			38,337,000	26,129,000	17,727,000
Dividend paid to noncontrolling interest holder	$ (3,065)
Compensation	3,003				$ 9,141	9,141
Allocation of ESOP shares to participants for Compensation, Shares					(731,000)
Dividend	127				$ 127	127
Dividend, Shares					(6,000)
Tax benefit resulting from exercise of certain stock-based compensation awards	(4)
Initial Public Offering (IPO)	72,196
Purchase of common stock	(3)	$ 0	$ 0	$ 0	$ 0	$ 0
Purchase of common stock, Shares			0	0	0	0
ESOP distributions in common stock				$ (6,133)		$ (6,133)
ESOP distribution in common stock, Shares				(490,000)
Adjustments to redeemable convertible preferred stock fair value measurement				$ 34,903	$ (23,849)	11,054
Adjustments to redeemable common stock fair value measurement			$ 65,921			65,921
Termination of redemption feature upon IPO			$ (615,040)			(615,040)
Termination of redemption feature upon IPO, Shares			(38,320,000)
Adjustments to redeemable common stock agreements			$ (240)			(240)
Adjustments to redeemable common stock agreements, Shares			(17,000)
Ending Balance, Value at Mar. 31, 2015				$ 320,490	$ (212,469)	108,021
Ending Balance, Shares at Mar. 31, 2015				25,639,000	16,990,000
Net income (loss)		435				435
Dividend paid to noncontrolling interest holder	(3,606)	$ (526)				(526)
Compensation	3,577				$ 6,673	6,673
Allocation of ESOP shares to participants for Compensation, Shares					(534,000)
Dividend	132				$ 132	$ 132
Dividend, Shares					(8,000)
Tax benefit resulting from exercise of certain stock-based compensation awards	$ 194
Purchase of common stock, Shares	0	0	0	0	0	0
ESOP distributions in common stock				$ (10,250)		$ (10,250)
ESOP distribution in common stock, Shares				(820,000)
Acquisition of redeemable noncontrolling interest		$ 6,330				6,330
Accretion of redeemable noncontrolling interest		932				932
Ending Balance, Value at Mar. 31, 2016	$ 111,747	7,171		$ 310,240	$ (205,664)	111,747
Ending Balance, Shares at Mar. 31, 2016				24,819,000	16,448,000
Net income (loss)		722				722
Dividend paid to noncontrolling interest holder	(879)	$ (1,226)				(1,226)
Compensation	2,254				$ 7,314	7,314
Allocation of ESOP shares to participants for Compensation, Shares					(585,000)
Dividend	134				$ 134	134
Tax benefit resulting from exercise of certain stock-based compensation awards	439
Purchase of common stock	$ 0
Purchase of common stock, Shares	0
ESOP distributions in common stock				$ (7,426)		$ (7,426)
ESOP distribution in common stock, Shares				(594,000)
Acquisition of redeemable noncontrolling interest, Shares		0	0	0	0	0
Accretion of redeemable noncontrolling interest		$ 1,560				$ 1,560
Ending Balance, Value at Mar. 31, 2017	$ 112,825	$ 8,227		$ 302,814	$ (198,216)	$ 112,825
Ending Balance, Shares at Mar. 31, 2017				24,225,000	15,863,000

Background and Summary of Signi

Background and Summary of Significant Accounting Policies	12 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Background and Summary of Significant Accounting Policies	1. BACKGROUND AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of Business - Advanced Drainage Systems, Inc. and subsidiaries (collectively referred to as “ADS” and the “Company”), incorporated in Delaware, designs, manufactures and markets high performance thermoplastic corrugated pipe and related water management products, primarily in North and South America and Europe. ADS’s broad product line includes corrugated high density polyethylene (or “HDPE”) pipe, polypropylene (or “PP”) pipe and related water management products. The Company’s fiscal year begins on April 1 and ends on March 31. Unless otherwise noted, references to “year” pertain to our fiscal year. For example, 2017 refers to fiscal 2017, which is the period from April 1, 2016 to March 31, 2017. The Company is managed based primarily on the geographies in which it operates and reports results of operations in two reportable segments. The reportable segments are Domestic and International. 2014 Initial Public Offering (“IPO”) - On July 11, 2014, in anticipation of the IPO, the Company executed a 4.707-for-one split of its common and its preferred stock. The effect of the stock split on outstanding shares and earnings per share has been retroactively applied to all prior periods presented. On July 25, 2014, ADS completed the IPO of its common stock, which resulted in the sale by the Company of 5.3 million shares of common stock. ADS received total proceeds from the IPO of $79.1 million after excluding underwriter discounts and commissions of $5.5 million, based upon the price to the public of $16.00 per share. After deducting other offering expenses of $6.9 million, the Company used the net proceeds of $72.2 million to reduce the outstanding indebtedness under the revolving portion of its credit facility. The common stock is listed on the New York Stock Exchange under the symbol “WMS.” On August 22, 2014, an additional 0.6 million shares of common stock were sold by certain selling stockholders of the Company as a result of the partial exercise by the underwriters of the over-allotment option granted by the selling stockholders to the underwriters in connection with the IPO. The shares were sold at the public offering price of $16.00 per share. The Company did not receive any proceeds from the sale of such additional shares. 2014 Secondary Public Offering (“Secondary Public Offering”) - On December 9, 2014, the Company completed a Secondary Public Offering of common stock, which resulted in the sale of 10.0 million shares of common stock by a certain selling stockholder of the Company at a public offering price of $21.25 per share. The Company did not receive any proceeds from the sale of shares by the selling stockholder. On December 15, 2014, an additional 1.5 million shares of common stock were sold by a certain selling stockholder of the Company as a result of the full exercise by the underwriters of the over-allotment option granted by the selling stockholder to the underwriters in connection with the Secondary Public Offering. The shares were sold at the public offering price of $21.25 per share. The Company did not receive any proceeds from the sale of such additional shares. Principles of Consolidation - The consolidated financial statements include the Company, its wholly owned subsidiaries, its majority owned subsidiaries, and variable interest entities (“VIEs”) of which the Company is the primary beneficiary. The Company uses the equity method of accounting for equity investments where it exercises significant influence but does not hold a controlling financial interest. Such investments are recorded in Other assets in the Consolidated Balance Sheets and the related equity in earnings from these investments are included in Equity in net loss of unconsolidated affiliates in the Consolidated Statements of Operations. All intercompany balances and transactions have been eliminated in consolidation. Estimates - The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingencies and liabilities at the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Significant estimates include, but are not limited to, the allowance for doubtful accounts, valuation of inventory, useful lives of property, plant and equipment and amortizing intangible assets, determination of the proper accounting for leases, valuation of equity method investments, goodwill, intangible assets and other long-lived assets for impairment, accounting for stock-based compensation and the ESOP, valuation of the redeemable common stock and redeemable convertible preferred stock, determination of allowances for sales returns, rebates and discounts, determination of the valuation allowance, if any, on deferred tax assets, and reserves for uncertain tax positions. Management’s estimates and assumptions are evaluated on an ongoing basis and are based on historical experience, current conditions and available information. Management believes the accounting estimates are appropriate and reasonably determined; however, due to the inherent uncertainties in making these estimates, actual results could differ from those estimates. Receivables and Allowance for Doubtful Accounts - Receivables include trade receivables, refundable income taxes and other miscellaneous receivables, net of an allowance for doubtful accounts. Receivables at March 31, 2017 and 2016 are as follows: (Amounts in thousands) 2017 2016 Trade receivables $ 160,655 $ 158,664 Refundable income taxes 1,468 19,783 Other miscellaneous receivables 6,820 8,436 Receivables $ 168,943 $ 186,883 Credit is extended to customers based on an evaluation of their financial condition and collateral is generally not required. The evaluation of the customer’s financial condition is performed to reduce the risk of loss. Accounts receivable are evaluated for collectability based on numerous factors, including the length of time individual receivables are past due, past transaction history with customers, their credit worthiness and the economic environment. This estimate is periodically adjusted when management becomes aware of a specific customer’s inability to meet its financial obligations (e.g., bankruptcy filing) or as a result of changes in historical collection patterns. Inventories - Inventories are stated at the lower of cost or market value. The Company’s inventories are maintained on the first-in, first-out (“FIFO”) method. Costs include the cost of acquiring materials, including in-bound freight from vendors and freight incurred for the transportation of raw materials, tooling or finished goods between the Company’s manufacturing plants and its distribution centers, direct and indirect labor, factory overhead and certain corporate overhead costs related to the production of inventory. The portion of fixed manufacturing overhead that relates to capacity in excess of our normal capacity is expensed in the period in which it is incurred and is not included in inventory. Market value of inventory is established based on the lower of cost or estimated net realizable value, with consideration given to deterioration, obsolescence, and other factors. The Company periodically evaluates the carrying value of inventories and adjustments are made whenever necessary to reduce the carrying value to net realizable value. Property, Plant and Equipment and Depreciation Method - Property, plant and equipment are recorded at cost less accumulated depreciation, with the exception of assets acquired through acquisitions, which are initially recorded at fair value. Equipment acquired under capital lease is recorded at the lower of fair market value or the present value of the future minimum lease payments. Depreciation is computed for financial reporting purposes using the straight-line method over the estimated useful lives of the related assets or the lease term, if shorter, as follows: Years Buildings 40 — 45 Machinery and equipment 3 — 18 Leasehold improvements Shorter of useful life or life of lease Costs of additions and major improvements are capitalized, whereas maintenance and repairs that do not improve or extend the life of the asset are charged to expense as incurred. When assets are retired or disposed, the cost and related accumulated depreciation are removed from the asset accounts and any resulting gain or loss is reflected in Loss on disposal of assets and costs from exit and disposal activities in our Consolidated Statements of Operations. Construction in progress is also recorded at cost and includes capitalized interest, capitalized payroll costs and related costs such as taxes and other fringe benefits. Interest capitalized was $0.6 million, $0.4 million, and $0.5 million during the fiscal years ended March 31, 2017, 2016, and 2015, respectively. Goodwill - The Company records acquisitions resulting in the consolidation of an enterprise using the acquisition method of accounting. Under this method, the Company records the assets acquired, including intangible assets that can be identified, and liabilities assumed based on their estimated fair values at the date of acquisition. The purchase price in excess of the fair value of the identifiable assets acquired and liabilities assumed is recorded as goodwill. Goodwill is reviewed annually for impairment as of March 31 or whenever events or changes in circumstances indicate the carrying value may be greater than fair value. The goodwill impairment analysis is comprised of two steps. The first step requires the comparison of the fair value of the applicable reporting unit to its respective carrying value. If the fair value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, goodwill is not considered impaired and the Company is not required to perform further testing. If the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, then the Company must perform the second step of the impairment test in order to determine the implied fair value of the reporting unit’s goodwill. If the carrying value of a reporting unit’s goodwill exceeds its implied fair value, then the Company would record an impairment loss equal to the difference. With respect to this testing, a reporting unit is a component of the Company for which discrete financial information is available and regularly reviewed by management. Implied fair value of goodwill is determined by considering both the income and market approach. Determining the fair value of a reporting unit is judgmental in nature and involves the use of significant estimates and assumptions. These estimates and assumptions include revenue growth rates and operating margins used to calculate projected future cash flows, risk-adjusted discount rates, future economic and market conditions, and determination of appropriate market comparables. The fair value estimates are based on assumptions management believes to be reasonable, but are inherently uncertain. For the fiscal 2017, ADS completed a quantitative fair value assessment of the International reporting unit and determined no impairment charge was required. GAAP allows entities testing goodwill for impairment the option of performing a qualitative assessment before calculating the fair value of a reporting unit for the goodwill impairment test. If the qualitative assessment is performed, an entity is no longer required to calculate the fair value of a reporting unit unless the entity determines that, based on that assessment, it is more likely than not that its fair value is less than its carrying amount. ADS completed a quantitative fair value measurement of the Domestic reporting unit in March 31, 2016. The test indicated that the fair value of the Domestic reporting unit exceeded the carrying value, indicating that no impairment existed. ADS applied the qualitative assessment to the Domestic reporting unit for the annual impairment test performed as of March 31, 2017. For the current year test, ADS assessed various assumptions, events and circumstances that would have affected the estimated fair value of the reporting unit as compared to its March 31, 2016 quantitative fair value measurement. The results of this assessment indicated that it is not more likely than not that the reporting unit fair value is less than the reporting unit carrying value. The Company did not incur any impairment charges for goodwill in the fiscal years ended March 31, 2017, 2016, and 2015. Intangible Assets Intangible Assets — Definite-Lived- Definite-lived intangible assets are amortized using the straight-line method over their estimated useful lives, and are tested for recoverability whenever events or changes in circumstances indicate that carrying amounts of the asset group may not be recoverable. Asset groups are established primarily by determining the lowest level of cash flows available. If the estimated undiscounted future cash flows are less than the carrying amounts of such assets, an impairment loss is recognized to the extent the fair value of the asset less any costs of disposition is less than the carrying amount of the asset. Determining the fair value of these assets is judgmental in nature and involves the use of significant estimates and assumptions. Intangible Assets — Indefinite-Lived- Indefinite-lived intangible assets are tested for impairment annually as of March 31 or whenever events or changes in circumstances indicate the carrying value may be greater than fair value. Determining the fair value of these assets is judgmental in nature and involves the use of significant estimates and assumptions. The Company bases its fair value estimates on assumptions it believes to be reasonable, but that are inherently uncertain. To estimate the fair value of these indefinite-lived intangible assets, the Company uses an income approach, which utilizes a market derived rate of return to discount anticipated performance. An impairment loss is recognized when the estimated fair value of the intangible asset is less than the carrying value. GAAP allows entities testing indefinite-lived intangible assets for impairment the option of performing a qualitative assessment before calculating the fair value of the indefinite-lived intangible assets for the impairment test. If the qualitative assessment is performed, an entity is no longer required to calculate the fair value of an indefinite-lived intangible assets unless the entity determines that, based on that assessment, it is more likely than not that its fair value is less than its carrying amount. ADS completed a quantitative fair value measurement of indefinite-lived trademarks in March 31, 2016. The test indicated that the fair value of the indefinite-lived trademarks substantially exceeded the carrying value, indicating that no impairment existed. ADS applied the qualitative assessment to specific trademarks for the annual impairment test performed as of March 31, 2017. For the current year test, ADS assessed various assumptions, events and circumstances that would have affected the estimated fair value of the reporting unit as compared to its March 31, 2016 quantitative fair value measurement. The results of this assessment indicated that it is not more likely than not that the trademarks fair value is less than the reporting unit carrying value. The Company did not incur any impairment charges for Intangible assets in the fiscal years ended March 31, 2017, 2016, and 2015. Other Assets - Other assets include investments in unconsolidated affiliates accounted for under the equity method, cash surrender value of officer life insurance on key senior management executives, capitalized software development costs, deposits, Central parts, and other miscellaneous assets. The Company capitalizes development costs for internal use software. Capitalization of software development costs begins in the application development stage and ends when the asset is placed into service. The Company amortizes such costs using the straight-line method over estimated useful lives of 2 to 10 years, which is included in General and administrative expense, Selling expense or Cost of goods sold within the Consolidated Statements of Operations depending on the nature of the asset and its intended use. Central parts represent spare production equipment items which are used to replace worn or broken production equipment parts and help reduce the risk of prolonged equipment outages. The cost of Central parts is amortized on a straight line basis over estimated useful lives of 8 to 30 years. The Company evaluates its investments in unconsolidated affiliates for impairment whenever events or changes in circumstances indicate that the carrying amount might not be recoverable, and recognizes an impairment loss when a decline in value below carrying value is determined to be other-than-temporary. Under these circumstances, the Company would adjust the investment down to its estimated fair value, which then becomes its new carrying value. For the fiscal years ended March 31, 2017 and 2016, the Company recorded an impairment charge of $1.3 million and $4.0 million, respectively, related to its investment in the South American Joint Venture. The impairment charge is included in Equity in net loss of unconsolidated affiliates in the Consolidated Statements of Operations. Other assets as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Investments in unconsolidated affiliates $ 8,986 $ 13,188 Cash surrender value of officer life insurance 12,028 10,739 Capitalized software development costs, net 7,980 7,264 Deposits 1,289 1,319 Central parts 1,856 1,040 Other 14,398 11,706 Total other assets $ 46,537 $ 45,256 The following table sets forth amortization expense related to Other assets in each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Capitalized software development costs $ 3,372 $ 3,872 $ 3,550 Central parts 54 362 55 Other 1,689 1,898 1,977 Leases - Leases are reviewed for capital or operating classification at their inception. The Company uses the lower of the rate implicit in the lease or its incremental borrowing rate in the assessment of lease classification and assumes the initial lease term includes cancellable and renewal periods that are reasonably assured. For leases classified as capital leases at lease inception, the Company records a capital lease asset and lease financing obligation equal to the lesser of the present value of the minimum lease payments or the fair market value of the leased asset. The capital lease asset is recorded in Property, plant and equipment, net and amortized to its expected residual value at the end of the lease term using the straight-line method, and the lease financing obligation is amortized using the effective interest method over the lease term with the rental payments being allocated to principal and interest. For leases classified as operating leases, the Company records rent expense over the lease term using the straight-line method. Foreign Currency Translation - Assets and liabilities of foreign subsidiaries with a functional currency other than the U.S. dollar are translated into U.S. dollars at the current rate of exchange on the last day of the reporting period. Revenues and expenses are translated at a monthly average exchange rate and equity transactions are translated using either the actual exchange rate on the day of the transaction or a monthly average historical exchange rate. For the fiscal years ended March 31, 2017, 2016, and 2015, the Company’s Accumulated other comprehensive loss (“AOCL”) consisted entirely of foreign currency translation gains and losses. Net Sales - The Company sells pipe products and related water management products. ADS ships products to customers predominantly by internal fleet and to a lesser extent by third-party carriers. The Company does not provide any additional revenue generating services after product delivery. Sales, net of sales tax and allowances for returns, rebates and discounts are recognized from product sales when persuasive evidence of an arrangement exists, delivery has occurred, the price to the buyer is fixed or determinable and collectability is reasonably assured. ADS recognizes revenue when both persuasive evidence of an arrangement and the price is fixed or determinable. Title to the products and risk of loss generally passes to the customer upon delivery. ADS performs credit check procedures on all new customers, establishes credit limits accordingly, and monitors the creditworthiness of existing customers, which is the basis for concluding that collectability is reasonably assured. Shipping Costs - Shipping costs are incurred to physically move raw materials, tooling and products between manufacturing and distribution facilities and from production or distribution facilities to customers. Shipping costs for the fiscal years ended March 31, 2017, 2016, and 2015 were $120.4 million, $120.5 million, and $121.0 million, respectively, and are included in Cost of goods sold. In certain instances, the Company bills shipping costs to customers. Shipping costs billed to customers were $5.5 million, $7.0 million, and $9.3 million during 2017, 2016 and 2015, respectively, and are included in Net sales. Stock-Based Compensation - See Note 18. Stock-Based Compensation for information about our stock-based compensation award programs and related accounting policies. Advertising - The Company expenses advertising costs as incurred. Advertising costs are recorded in Selling expenses in the Consolidated Statements of Operations. The total advertising costs were $3.1 million, $3.2 million, and $2.5 million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively. Self-Insurance - The Company is self-insured for short term disability and medical coverage it provides for substantially all eligible employees. The Company is self-insured for medical claims up to the individual and aggregate stop-loss coverage limits. The Company accrues for claims incurred but not reported based on an estimate of future claims related to events that occurred prior to the fiscal year end if it has not met the aggregate stop-loss coverage limit. Amounts expensed totaled $39.5 million, $37.5 million, and $32.0 million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively, of which employees contributed $5.1 million, $4.5 million, and $4.1 million, respectively. ADS is also self-insured for various other general insurance programs to the extent of the applicable deductible limits on the Company’s insurance coverage. These programs include primarily automobile, general liability and employment practices coverage with deductibles ranging from $0.3 million to $0.5 million per occurrence or claim incurred. Amounts expensed during the period, including an estimate for claims incurred but not reported at year end, were $1.8 million, $2.1 million, and $0.6 million, for the years ended March 31, 2017, 2016, and 2015, respectively. ADS is also self-insured for workers’ compensation insurance with stop-loss coverage for claims that exceed $0.3 million per incident up to the respective state statutory limits. Amounts expensed, including an estimate for claims incurred but not reported, were $2.1 million, $3.9 million, and $1.4 million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively. Income Taxes - Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized and represent the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. They are measured using the enacted tax rates expected to apply to taxable income in the years in which the related temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The deferred income tax provision represents the change during the reporting period in the deferred tax assets and deferred tax liabilities. Penalties and interest recorded on income taxes payable are recorded as part of Income tax expense. The Company determines whether an uncertain tax position is more likely than not to be sustained upon examination, including resolution of any related appeals or litigation process, based upon the technical merits of the position. For tax positions meeting the more likely than not threshold, the tax amount recognized in the financial statements is the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant taxing authority. Fair Values - The fair value framework requires the categorization of assets and liabilities into three levels based upon assumptions (inputs) used to price the assets or liabilities. Level 1 provides the most reliable measure of fair value, whereas Level 3 generally requires significant management judgment. The three levels are defined as follows: Level 1 — Unadjusted quoted prices in active markets for identical assets and liabilities. Level 2 — Observable inputs other than those included in Level 1. For example, quoted prices for similar assets or liabilities in active markets or quoted prices for identical assets or liabilities in inactive markets. Level 3 — Unobservable inputs reflecting management’s own assumptions about the inputs used in pricing the asset or liability. ADS’s policy for determining when transfers between levels have occurred is to use the actual date of the event or change in circumstances that caused the transfer. Concentrations of Risk - The Company has a large, active customer base of approximately twenty thousand customers with two customers, Ferguson Enterprises and HD Supply Waterworks, each representing more than 10% of annual net sales. Such customers accounted for 23.5%, 21.1%, and 20.3% of fiscal year 2017, 2016 and 2015 net sales, respectively. The Company’s customer base is diversified across the range of end markets that it serves. Financial instruments that potentially subject the Company to a concentration of credit risk consist principally of Receivables. The Company provides its products to customers based on an evaluation of the customers’ financial condition, generally without requiring collateral. Exposure to losses on Receivables is principally dependent on each customer’s financial condition. The Company performs ongoing credit evaluations of its customers. The Company monitors the exposure for credit losses and maintains allowances for anticipated losses. Concentrations of credit risk with respect to Receivables are limited due to the large number of customers comprising the Company’s customer base and their dispersion across many different geographies. One customer, Ferguson Enterprises, accounted for approximately 15.7% and 14.0% of Receivables at March 31, 2017 and 2016, respectively. Derivatives - The Company recognizes derivative instruments as either assets or liabilities and measure those instruments at fair value. ADS uses interest rate swaps, commodity options in the form of collars and swaps, and foreign currency forward contracts to manage various exposures to interest rate, commodity price, and exchange rate fluctuations. These instruments do not qualify for hedge accounting treatment and therefore, gains and losses from contract settlements and changes in fair value of the derivative instruments are recognized in Derivative losses (gains) and other expense (income), net in the Consolidated Statements of Operations. The Company’s policy is to present all derivative balances on a gross basis. The Company also has forward purchase agreements in place with certain resin suppliers for virgin polyethylene resin. The agreements specify a fixed amount of virgin resin material to be purchased at a fixed price for a given period of time in quantities the Company will use in the normal course of business, and therefore, are not subject to the guidance provided in Accounting Standards Codification ASC”) 810-15 Consolidation Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements Consolidation — In February 2015, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update to make changes to consolidation guidance to address concerns of stakeholders that current accounting for certain legal entities might require a reporting entity to consolidate another legal entity in situations in which the reporting entity’s contractual rights do not give it the ability to act primarily on its own behalf, the reporting entity does not hold a majority of the legal entity’s voting rights, or the reporting entity is not exposed to a majority of the legal entity’s economic benefits or obligations. This update is effective for annual periods beginning on or after December 15, 2015, and interim periods within those years, with early adoption permitted. The Company adopted this standard effective April 1, 2016. The update has had no effect on the consolidated financial statements. Debt Issuance Costs — In April 2015, the FASB issued an accounting standards update that requires debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability instead of being presented as an asset. Debt disclosures will include the face amount of the debt liability and the effective interest rate. The update requires retrospective application and represents a change in accounting principle. In August 2015, the FASB issued an additional accounting standards update that provided supplemental guidance that the SEC would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. These updates are effective for annual periods beginning after December 15, 2015, and interim periods within those years. Early adoption is permitted for financial statements that have not been previously issued. The Company adopted this standard effective April 1, 2016 on a retrospective basis. See Note 12. Debt for additional information about the impact of the adoption of the updates. Deferred Tax Assets and Liabilities — In November 2015, the FASB issued an accounting standards update which requires entities to classify all deferred tax assets and liabilities, as well as any related valuation allowance, as non-current, rather than separately record the current and non-current portions. This update is effective for annual periods beginning on or after December 15, 2016, and interim periods within those years, with early adoption permitted. The amendments in this update may be applied either prospectively to all deferred tax liabilities and assets or retrospectively to all periods presented. The Company adopted this standard on April 1, 2016 on a prospective basis and prior periods have not been adjusted. The impact of the adoption of this standard was a reduction to the net current deferred tax assets balance included in Deferred income taxes and other current assets on the Consolidated Balance Sheets from $11.7 million as of March 31, 2016 to zero as of March 31, 2017, with all deferred tax assets and liabilities as of March 31, 2017 now being classified as non-current. The update had no effect on the Company’s Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income (Loss), Consolidated Statements of Cash Flows and Consolidated Statements of Stockholders’ Equity and Mezzanine Equity. Internal-Use Software – In April 2017 the FASB issued an accounting standards update to provide guidance to customers concerning whether a cloud computing arrangement includes a software license. Under this new standard, 1) if a cloud computing arrangement includes a software license, the software license element of the arrangement should be accounted for in a manner consistent with the acquisition of other software licenses, or 2) if the a

Loss on Disposal of Assets and

Loss on Disposal of Assets and Costs from Exit and Disposal Activities	12 Months Ended
	Mar. 31, 2017
Discontinued Operations And Disposal Groups [Abstract]
Loss on Disposal of Assets and Costs from Exit and Disposal Activities	2. LOSS ON DISPOSAL OF ASSETS AND COSTS FROM EXIT AND DISPOSAL ACTIVITIES Periodically, the Company will dispose of equipment, including equipment accounted for as capital leases. The net loss on the disposition of the equipment was $8.5 million, $0.8 million, and $1.1 million during the fiscal 2017, 2016 and 2015, respectively. The Company recorded expenses related to three manufacturing facilities that were closed during fiscal 2017 of approximately $3.5 million. In addition, the Company accelerated depreciation of specifically identified obsolete assets of approximately $3.0 million, and recorded $2.0 million of disposals and partial disposals of fixed assets. In the fourth quarter of fiscal 2015, the Company completed the sale of product-related intellectual property rights that were not significant. The sales price was $0.8 million, consisting of a cash payment of $0.2 million plus other consideration in the form of a note receivable for $0.6 million. The sale did not involve any tangible assets, and the related intellectual property rights had no net book value, resulting in a net gain recognized of $0.8 million.

Acquisitions

Acquisitions	12 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Acquisitions	3. ACQUISITIONS Fiscal 2017 Acquisition of Plastic Tubing Industries On February 6, 2017, ADS acquired Plastic Tubing Industries (“PTI”), a manufacturer of HDPE pipe and related accessories. With the acquisition, ADS will increase its manufacturing footprint in Georgia and Texas, while adding production capacity to the existing ADS manufacturing facilities in Florida, to better serve growing demand in the region. The purchase price of PTI was $9.5 million, financed through the existing line of credit facility. At the time of acquisition, $8.5 million was paid in cash; the remaining $1.0 million will be paid on August 6, 2018. The results of operations of PTI are included in the Consolidated Statements of Operations after February 6, 2017. The Net sales and Income before income taxes of PTI since the acquisition date included in the Consolidated Statements of Operations for the fiscal year ended March 31, 2017 were immaterial. The fair value of the net assets acquired exceeded the purchase price. The difference was recognized as a gain on bargain purchase in fiscal 2017. The purchase price allocation is as follows: (Amounts in thousands) Intangible assets $ 160 Inventory 2,050 Property, plant and equipment 7,899 Fair value of net assets acquired 10,109 Purchase price 9,500 Gain on bargain purchase $ 609 The acquired identifiable intangible assets represent trade name of $0.2 million (seven-year useful life). The following table contains unaudited pro forma Consolidated Statements of Operations information assuming the acquisition occurred on April 1, 2015 and includes adjustments for amortization of intangibles and depreciation of fixed asset. This unaudited pro forma information is presented for illustrative purposes only and is not indicative of what actual results would have been if the acquisition had taken place on April 1, 2015 or of future results. In addition, the unaudited pro forma consolidated results are not projections of future results of operations of the combined company nor do they reflect the expected realization of any cost savings or synergies associated with the acquisition. Proforma (Amounts in thousands) 2017 2016 Net sales $ 1,266,602 $ 1,302,120 Net income attributable to ADS 33,634 25,100 Unaudited pro forma net income attributable to ADS for the fiscal years ended March 31, 2017 and 2016 has been calculated after adjusting the combined results of the Company to reflect additional intangible asset amortization expense, net of related income taxes, of less than $0.1 million, and depreciation expense, net of related income taxes, of $0.6 million. Fiscal 2016 Step Acquisition of BaySaver On July 17, 2015, ADS Ventures, Inc. (“ADS/V”), a wholly-owned subsidiary of the Company, acquired an additional 10% of the issued and outstanding membership interests in BaySaver, increasing the Company’s total ownership interest in BaySaver to 65%, for a purchase price of $3.2 million, plus contingent consideration with an initial estimated fair value of $0.8 million. Concurrent with the purchase of the additional membership investment, the BaySaver joint venture agreement was amended to modify the voting rights from an equal vote for each member to a vote based upon the ownership interest. As a result, the Company has accounted for this transaction as a business combination with BaySaver being consolidated into the financial statements after July 17, 2015. As the Company has accounted for the investment in BaySaver prior to the purchase of the 10% additional membership interest under the equity method of accounting, the Company accounted for this business combination as a step acquisition and recognized a loss of $0.5 million on remeasurement to fair value of the previously held investment. The loss is included in Derivative losses and other expense, net in the Consolidated Statements of Operations. The fair value of our BaySaver investment immediately before the July 17, 2015 acquisition was measured based on a combination of the discounted cash flow and guideline public company valuation methods and involves significant unobservable inputs (Level 3). These inputs include projected sales, margin, required rate of return and tax rate for the discounted cash flow method, as well as implied pricing multiples, and guideline public company group for the guideline public company method. The purchase price was determined as follows: (Amounts in thousands) Acquisition-date fair value of prior equity interest $ 4,220 Acquisition-date fair value of noncontrolling interest 6,330 Cash paid at acquisition date 3,200 Fair value of contingent consideration 750 Total purchase price $ 14,500 The purchase price has been allocated to the estimated fair values of acquired tangible and intangible assets, assumed liabilities and goodwill. The fair value of identifiable intangible assets has been determined primarily using the income approach, which involves significant unobservable inputs (Level 3 inputs). These inputs include projected sales, margin, required rate of return and tax rate, as well as an estimated royalty rate in the cases of the developed technology and trade name and trademark intangibles. The developed technology and trade name and trademark intangibles are valued using a relief-from-royalty method. Redeemable noncontrolling interest in subsidiaries is classified as mezzanine equity in the Consolidated Balance Sheets due to a put option held by the joint venture partner, which may be exercised on or after April 1, 2017. The redeemable noncontrolling interest balance will be accreted to the estimated redemption value using the effective interest method until April 1, 2017. The excess of the purchase price over the fair value of the net assets acquired of $2.5 million was allocated to goodwill, assigned to the Domestic segment, and consists primarily of the acquired workforce and sales and cost synergies the two companies anticipate realizing as a combined company. None of the goodwill is deductible for tax purposes. The purchase price allocation is as follows: (Amounts in thousands) Cash $ 12 Other current assets 2,262 Property, plant and equipment 164 Goodwill 2,495 Intangible assets 10,800 Other assets 152 Current liabilities (1,385 ) Total purchase price $ 14,500 The acquired identifiable intangible assets represent customer relationships of $5.4 million, developed technology of $4.0 million and trade name and trademark of $1.4 million, each of which have an estimated 10-year useful life. Transaction costs were immaterial. The net sales and income before income taxes of BaySaver since the acquisition date included in the Consolidated Statements of Operations for the fiscal year ended March 31, 2016 were $10.2 million, and $1.2 million, respectively. The following table contains unaudited pro forma Consolidated Statements of Operations information assuming the acquisition occurred on April 1, 2014 and includes adjustments for amortization of intangibles, interest expense and the prior equity method accounting for BaySaver. This unaudited pro forma information is presented for illustrative purposes only and is not indicative of what actual results would have been if the acquisition had taken place on April 1, 2014 or of future results. The unaudited pro forma consolidated results are not projections of future results of operations of the combined company nor do they reflect the expected realization of any cost savings or synergies associated with the acquisition. Proforma (Amounts in thousands) 2016 2015 Net sales $ 1,294,277 $ 1,190,749 Net income (loss) attributable to ADS 25,090 (7,799 ) Unaudited pro forma net income attributable to ADS has been calculated after adjusting the combined results of the Company to reflect additional intangible asset amortization expense, net of related income taxes and amounts related to the noncontrolling interest, of $0.1 million and $0.3 million, additional interest expense, net of related income taxes and amounts related to the noncontrolling interest, of less than $0.1 million and less than $0.1 million, and the impact of our prior equity method accounting of $0.1 million and $0.3 million, net of related income taxes, for the year ended March 31, 2016 and 2015, respectively. Fiscal 2015 Acquisition of Ideal Pipe On January 30, 2015, Hancor of Canada, Inc., a wholly-owned subsidiary of the Company, acquired all issued and outstanding shares of Ideal Drain Tile Limited and Wave Plastics Inc., the sole partners of Ideal Pipe (together “Ideal Pipe”). Ideal Pipe designs, manufactures and markets high performance thermoplastic corrugated pipe and related water management products used across a broad range of Canadian end markets and applications, including nonresidential, residential, agriculture, and infrastructure applications. The acquisition further strengthens the Company’s position in Canada by increasing its size and scale in the market, as well as enhancing manufacturing, marketing and distribution capabilities. The purchase price of Ideal Pipe was $43.8 million, financed through cash acquired and the existing line of credit facility. The results of operations of Ideal Pipe are included in the Consolidated Statements of Operations after January 30, 2015. The Net sales and Income before income taxes of Ideal Pipe since the acquisition date included in the Consolidated Statements of Operations for the fiscal year ended March 31, 2015 were immaterial. The excess of the purchase price over the fair value of the net assets acquired of $10.7 million was allocated to goodwill, assigned to the International segment, and consists primarily of the acquired workforce and synergies the two companies anticipate realizing as a combined company. None of the goodwill is deductible for tax purposes. The purchase price allocation is as follows: (Amounts in thousands) Cash $ 7,443 Other current assets 9,036 Property, plant and equipment 27,258 Goodwill and intangible assets 18,890 Current liabilities (12,721 ) Non-current liabilities (6,078 ) Total purchase price $ 43,828 Transaction costs were immaterial. However, the Company did incur a loss on a currency hedge related to the purchase of Ideal Pipe in the amount of $5.6 million which was recorded in Derivatives losses (gains) and other expense (income), net in the Consolidated Statements of Operations. The Company used this currency hedge to fix the purchase price which was denominated in Canadian dollars from the agreement date until the transaction ultimately closed on January 30, 2015. The acquired identifiable intangible assets represent customer relationships of $4.9 million (seven-year useful life), trade name of $3.1 million (10-year useful life), and non-compete agreements of $0.3 million (three-year useful life). The following table contains unaudited pro forma Consolidated Statements of Operations information assuming the acquisition occurred on April 1, 2014 and includes adjustments for amortization of intangibles, depreciation of fixed assets and interest expense. This unaudited pro forma information is presented for illustrative purposes only and is not indicative of what actual results would have been if the acquisition had taken place on April 1, 2013 or of future results. In addition, the unaudited pro forma consolidated results are not projections of future results of operations of the combined company nor do they reflect the expected realization of any cost savings or synergies associated with the acquisition. Proforma (Amounts in thousands) 2015 Net sales $ 1,217,431 Net (loss) income attributable to ADS (6,118 ) Unaudited pro forma net income attributable to ADS for the fiscal year ended March 31, 2015 has been calculated after adjusting the combined results of the Company to reflect additional intangible asset amortization expense, net of related income taxes, of $0.7 million, reduced depreciation expense, net of related income taxes, of less than ($0.1) million and additional interest expense, net of related income taxes, of $0.5 million.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Mar. 31, 2017
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	4. PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment, net as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Land, buildings and improvements $ 189,163 $ 178,189 Machinery and equipment 771,878 730,791 Construction in progress 14,022 14,902 Total cost 975,063 923,882 Less accumulated depreciation (568,205 ) (532,138 ) Property, plant and equipment, net $ 406,858 $ 391,744 The following table sets forth depreciation expense related to Property, plant and equipment in each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Depreciation expense (inclusive of leased assets depreciation) $ 58,692 $ 55,650 $ 50,136

Leases

Leases	12 Months Ended
	Mar. 31, 2017
Leases [Abstract]
Leases	5. LEASES Capital Leases - The Company leases certain buildings and transportation equipment including its fleet of trucks and trailers, under capital lease agreements. Leased assets included in Property, plant and equipment consisted of the following: (Amounts in thousands) 2017 2016 Buildings and improvements $ 6,044 $ 6,131 Machinery and equipment 199,813 186,258 Total cost 205,857 192,389 Less accumulated depreciation (108,144 ) (102,572 ) Leased assets in Property, plant and equipment, net $ 97,713 $ 89,817 The following sets forth the interest and depreciation expense related to capital leases recorded in each fiscal year ended March 31: (Amounts in thousands) 2017 2016 2015 Lease interest expense $ 3,864 $ 3,367 $ 2,249 Depreciation of leased assets 17,415 15,782 13,943 The following is a schedule by year of future minimum lease payments under capital leases and the present value of the net minimum lease payments as of March 31, 2017: (Amounts in thousands) 2018 $ 24,329 2019 19,784 2020 15,681 2021 12,521 2022 9,271 Thereafter 6,072 Total minimum lease payments (a) $ 87,658 Less: amount representing interest (b) 7,498 Present value of net minimum lease payments $ 80,160 Current maturities of capital lease obligations 21,450 Long-term capital lease obligations 58,710 Total lease obligation $ 80,160 (a) Excludes contingent rentals which may be paid. Contingent rentals amounted to $0.6 million, $0.1 million and $0.8 million for the years ended March 31, 2017, 2016 and 2015, respectively. (b) Amount necessary to reduce minimum lease payments to present value calculated at the lower of the rate implicit in the lease or the Company’s incremental borrowing rate at lease inception. Certain leases contain residual value guarantees that create a contingent obligation on the part of the Company to compensate the lessor if the leased asset cannot be sold for an amount in excess of a specified minimum value at the conclusion of the lease term. The calculation is based on the original cost of the transportation equipment, less lease payments made, compared to a percentage of the transportation equipment’s fair market value at the time of sale. All leased units covered by this guarantee have been classified as capital leases and a corresponding capital lease obligation was recorded. Therefore, no further contingent obligation is needed. Operating leases - The Company leases certain real estate and office equipment under various cancellable and non-cancellable operating lease agreements that expire at various dates through fiscal year 2037. Future minimum rental commitments under non-cancellable operating leases as of March 31, 2017, are summarized below (amounts in thousands): 2018 2019 2020 2021 2022 Thereafter Future operating lease payments $ 3,004 $ 2,531 $ 1,921 $ 1,381 $ 755 $ 3,100 Total rent expense was $6.6 million, $6.3 million, and $4.0 million in the fiscal years ended March 31, 2017, 2016, and 2015, respectively.

Inventories

Inventories	12 Months Ended
	Mar. 31, 2017
Inventory Disclosure [Abstract]
Inventories	6. INVENTORIES Inventories as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Raw materials $ 52,746 $ 46,604 Finished goods 205,684 183,862 Total Inventories $ 258,430 $ 230,466 The Company had no work-in-process inventories as of March 31, 2017 and 2016. During fiscal years ended March 31, 2017 and 2016, the Company incurred production-related general and administrative costs included in the cost of finished goods inventory of $21.2 million and $18.0 million, respectively, of which $6.3 million and $5.3 million remained in inventory at March 31, 2017 and 2016, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Mar. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	7. GOODWILL AND INTANGIBLE ASSETS Goodwill - The carrying amount of goodwill by reportable segment is as follows: (Amounts in thousands) Domestic International Total Balance at April 1, 2015 $ 87,507 $ 11,172 $ 98,679 Acquisition 2,495 — 2,495 Currency translation — (289 ) (289 ) Balance at March 31, 2016 $ 90,002 $ 10,883 $ 100,885 Currency translation — (319 ) (319 ) Balance at March 31, 2017 $ 90,002 $ 10,564 $ 100,566 Intangible Assets - Intangible assets as of March 31, 2017 and 2016 consisted of the following: 2017 2016 (Amounts in thousands) Gross Intangible Accumulated Amortization Net Intangible Gross Intangible Accumulated Amortization Net Intangible Definite-lived intangible assets Developed technology $ 27,580 $ (14,888 ) $ 12,692 $ 44,579 $ (29,371 ) $ 15,208 Customer relationships 40,767 (26,768 ) 13,999 40,732 (22,646 ) 18,086 Patents 7,512 (4,768 ) 2,744 7,048 (4,167 ) 2,881 Non-compete and other contractual agreements 1,242 (1,102 ) 140 1,242 (842 ) 400 Trademarks and tradenames 15,741 (5,465 ) 10,276 15,563 (4,195 ) 11,368 Total definite-lived intangible assets 92,842 (52,991 ) 39,851 109,164 (61,221 ) 47,943 Indefinite-lived intangible assets Trademarks 11,907 — 11,907 11,926 — 11,926 Total Intangible assets $ 104,749 $ (52,991 ) $ 51,758 $ 121,090 $ (61,221 ) $ 59,869 The gross intangible asset value of developed technology decreased due to write-offs of fully amortized intangible assets in fiscal 2017. The following table presents the weighted average amortization period for definite-lived intangible assets at March 31, 2017: Weighted Average Amortization Period (in years) Developed technology 11.0 Customer relationships 8.5 Patents 8.3 Non-compete and other contractual agreements 5.1 Trademarks and tradenames 13.5 The following table presents the future intangible asset amortization expense based on existing intangible assets at March 31, 2017: Fiscal Year (Amounts in thousands) 2018 2019 2020 2021 2022 Thereafter Total Amortization expense $ 7,847 $ 7,692 $ 6,006 $ 5,865 $ 4,224 $ 8,217 $ 39,851

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurement	8. FAIR VALUE MEASUREMENT When applying fair value principles in the valuation of assets and liabilities, the Company is required to maximize the use of quoted market prices and minimize the use of unobservable inputs. The Company has not changed its valuation techniques used in measuring the fair value of any financial assets or liabilities during the fiscal years presented. The fair value estimates take into consideration the credit risk of both the Company and its counterparties. When active market quotes are not available for financial assets and liabilities, ADS uses industry standard valuation models. Where applicable, these models project future cash flows and discount the future amounts to a present value using market-based observable inputs including credit risk, interest rate curves, foreign currency rates and forward and spot prices for currencies. In circumstances where market-based observable inputs are not available, management judgment is used to develop assumptions to estimate fair value. Generally, the fair value of our Level 3 instruments is estimated as the net present value of expected future cash flows based on internal and external inputs. Recurring Fair Value Measurements The assets, liabilities and mezzanine equity carried at fair value as of the fiscal years ended March 31 were as follows: March 31, 2017 (Amounts in thousands) Total Level 1 Level 2 Level 3 Assets: Derivative assets — diesel fuel contracts $ 179 $ — $ 179 $ — Total assets at fair value on a recurring basis $ 179 $ — $ 179 $ — Liabilities: Derivative liability - diesel fuel contracts $ 142 $ — $ 142 $ — Contingent consideration for acquisitions 1,348 — — 1,348 Total liabilities at fair value on a recurring basis $ 1,490 $ — $ 142 $ 1,348 March 31, 2016 (Amounts in thousands) Total Level 1 Level 2 Level 3 Assets: Derivative assets — currency forward contracts $ 11 $ — $ 11 $ — Total assets at fair value on a recurring basis $ 11 $ — $ 11 $ — Liabilities: Derivative liability — interest rate swaps $ 252 $ — $ 252 $ — Derivative liability — diesel fuel contracts 2,615 — 2,615 — Derivative liability — propylene swaps 8,027 — 8,027 — Contingent consideration for acquisitions 2,858 — — 2,858 Total liabilities at fair value on a recurring basis $ 13,752 $ — $ 10,894 $ 2,858 Quantitative Information about Level 3 Fair Value Measurements (Amounts in thousands) Liabilities & Mezzanine Equity Fair Value at 3/31/17 Valuation Technique(s) Unobservable Input Quantifiable Input Contingent consideration for acquisitions $ 1,348 Discounted cash flow Weighted Average Cost of Capital (“WACC”) (a) 9.50% Liabilities & Mezzanine Equity Fair Value at 3/31/16 Valuation Technique(s) Unobservable Input Quantifiable Input Contingent consideration for acquisitions $ 2,858 Discounted cash flow Weighted Average Cost of Capital (“WACC”) (a) 9.75%-10% (a) Represents discount rates or rates of return estimates and assumptions that the Company believes would be used by market participants when valuing these liabilities. Changes in the fair value of recurring fair value measurements using significant unobservable inputs (Level 3) for the fiscal years ended March 31, 2017 and 2016 were as follows: Contingent consideration Balance at March 31, 2015 $ 2,444 Acquisition 750 Change in fair value 371 Payments of contingent consideration liability (707 ) Balance at March 31, 2016 $ 2,858 Change in fair value (266 ) Payments of contingent consideration liability (1,244 ) Balance at March 31, 2017 $ 1,348 There were no transfers in or out of Levels 1, 2 and 3 for the fiscal years ended March 31, 2017 and 2016. Valuation of Contingent Consideration for Acquisitions - The fair values of the contingent consideration payables for acquisitions were calculated based on a discounted cash flow model, whereby the probability-weighted future payment value is discounted to the present value using a market discount rate. The method used to price these liabilities is considered Level 3, due to the subjective nature of the unobservable inputs used to determine the fair value. Valuation of Redeemable Common Stock and Executive Stock Repurchase Agreements Obligations - The redemption feature of our redeemable common stock allowing the holder to put its shares to ADS for cash, as discussed in the previous paragraph, became unenforceable upon effectiveness of the IPO on July 25, 2014. As a result, the redeemable common stock was recorded at fair value through the effective date of the IPO and was subsequently reclassified at that fair value to stockholders’ equity. See Note 1. Background and Summary of Significant Accounting Policies for more information on the IPO. The liability associated with the executive stock repurchase agreements was valued on the same basis as the redeemable common stock, and as such is also considered a Level 3 measurement. The executive stock repurchase agreements were terminated upon the IPO. As a result, this liability was recorded at fair value through the effective date of the IPO and was subsequently reclassified at that fair value to stockholders’ equity. See Note 16. Stockholders’ Equity for more information on the executive stock repurchase agreements. Valuation of Debt - The carrying amounts of current financial assets and liabilities approximate fair value because of the immediate or short-term maturity of these items, or in the case of derivative instruments, because they are recorded at fair value. The carrying and fair value of the Company’s Senior Notes (discussed in Note 12. Debt) were $75.0 million and $75.9 million, respectively, as of March 31, 2017 and $100.0 million and $101.2 million, respectively, at March 31, 2016. The fair value of the Senior Notes was determined based on a comparison of the interest rate and terms of such borrowings to the rates and terms of similar debt available for the period. The Company believes the carrying amount on the remaining long-term debt, including the Secured Bank Term Loans, is not materially different from its fair value as the interest rates and terms of the borrowings are similar to currently available borrowings. The categorization of the framework used to evaluate this debt is considered Level 2. Non-recurring Fair Value Measurements Valuation of Investment in the South American Joint Venture - During the fourth quarter of the fiscal years ended March 31, 2017 and 2016, the Company recorded an impairment charge related to its investment in the South American Joint Venture equal to the difference between the fair value of the investment and the carrying value. The method used to value the investment is considered Level 3 due to the subjective nature of the unobservable inputs used to determine the fair value. In the determination of fair value of its investment, the Company used a weighted income approach, based on internal forecasts of expected future cash flows, and market approach, based on comparable public companies. Significant unobservable inputs included the WACC used to discount the future cash flows, which were between 9.3% and 16.5%, based on the markets in which the South American Joint Venture conducts business. See Note 10. Investment in Unconsolidated Affiliates.

Investment in Affiliates

Investment in Affiliates	12 Months Ended
	Mar. 31, 2017
Subsidiaries [Member]
Investment in Affiliates	9. INVESTMENT IN CONSOLIDATED AFFILIATES ADS participates in two consolidated joint ventures, ADS Mexicana, which is 51% owned by the Company’s wholly-owned subsidiary ADS Worldwide, Inc., and BaySaver, which is 65% owned by the Company’s wholly-owned subsidiary ADS Ventures, Inc. In each case, the equity owned by the Company’s joint venture partner is shown as either Noncontrolling interest in subsidiaries (in the case of ADS Mexicana) or Redeemable noncontrolling interest in subsidiaries (in the case of BaySaver) in the Consolidated Balance Sheets and the joint venture partner’s portion of net income is shown as Net income attributable to noncontrolling interest in the Consolidated Statements of Operations. ADS Mexicana - ADS participates in joint ventures from time to time for the purpose of expanding upon the growth of manufacturing and selling HDPE corrugated pipe in emerging markets. ADS invested in ADS Mexicana for the purpose of expanding upon our growth of manufacturing and selling ADS licensed HDPE corrugated pipe and related products in the Mexican and Central American markets via the joint venture partner’s local presence and expertise throughout the region. The Company owns a 51% equity interest in ADS Mexicana. The Company executed a Technology, Patents and Trademarks Sub-License Agreement and a Distribution Agreement with ADS Mexicana that provides ADS Mexicana with the rights to manufacture and sell ADS licensed products in Mexico and Central America. The Company has concluded that it holds a variable interest in and is the primary beneficiary of ADS Mexicana based on the power to direct the most significant activities of ADS Mexicana and the obligation to absorb losses and the right to receive benefits that could be significant to ADS Mexicana. As the primary beneficiary, the Company is required to consolidate the assets and liabilities of ADS Mexicana. The table below includes the assets and liabilities of ADS Mexicana that are consolidated as of March 31, 2017 and 2016. The balances exclude intercompany transactions that are eliminated upon consolidation. (Amounts in thousands) 2017 2016 Assets Current assets $ 24,952 $ 27,650 Property, plant and equipment, net 19,262 17,461 Other noncurrent assets 2,269 1,742 Total assets $ 46,483 $ 46,853 Liabilities Current liabilities $ 11,042 $ 10,769 Noncurrent liabilities 2,961 5,390 Total liabilities $ 14,003 $ 16,159 BaySaver - BaySaver was established in July 2013 to design, engineer, manufacture, market and sell water quality filters and separators used in the removal of sediment and pollution from storm water anywhere in the world except New Zealand, Australia and South Africa. The Company’s original investment represented a 55% equity interest and a 50% voting interest in BaySaver. On July 17, 2015, the Company acquired an additional 10% of the issued and outstanding membership interests in the BaySaver joint venture. Concurrent with the additional investment in July 2015, the Company also entered into an amendment to the BaySaver joint venture agreement to change the voting rights from an equal vote for each member to a vote based upon the ownership interest. As a result, the Company increased its ownership interest to 65% of the issued and outstanding membership interests in BaySaver and obtained the majority of the voting rights. As such, while the Company had previously accounted for its investment in BaySaver under the equity method of accounting, the Company has concluded that the additional investment results in a step acquisition of BaySaver that will be treated as a business combination. As a result, the consolidated financial statements include the consolidation of BaySaver’s financial statements beginning on July 17, 2015. See Note 3. Acquisitions for additional information. The table below includes the assets and liabilities of BaySaver that are consolidated as of March 31, 2017 and 2016. The balances exclude intercompany transactions that are eliminated upon consolidation. (Amounts in thousands) 2017 2016 Assets Current assets $ 2,572 $ 3,121 Property, plant and equipment, net 111 140 Other noncurrent assets 11,568 12,668 Total assets $ 14,251 $ 15,929 Liabilities Current liabilities $ 1,344 $ 1,696 Total liabilities $ 1,344 $ 1,696
Unconsolidated Affiliates [Member]
Investment in Affiliates	10. INVESTMENT IN UNCONSOLIDATED AFFILIATES The Company participates in two unconsolidated joint ventures, South American Joint Venture, which is 50% owned by the Company’s wholly-owned subsidiary ADS Chile, and Tigre-ADS USA, Inc. (“Tigre-ADS USA”), which is 49% owned by the Company’s wholly-owned subsidiary ADS Ventures, Inc. In each case, the Company has concluded that it is appropriate to account for these investments using the equity method, whereby the Company’s share of the income or loss of the joint venture is reported in the Consolidated Statements of Operations under Equity in net loss (income) of unconsolidated affiliates and the Company’s investment in the joint venture is included in Other assets in the Consolidated Balance Sheets. South American Joint Venture - The Company’s investment in this unconsolidated joint venture was formed for the purpose of expanding upon the growth of manufacturing and selling HDPE corrugated pipe in the South American market via the joint venture partner’s local presence and expertise throughout the region. The Company is not required to consolidate the South American Joint Venture as it is not the primary beneficiary, although the Company does hold a significant variable interest in the South American Joint Venture through the equity investment and debt guarantee. Summarized financial data as of the fiscal years ended March 31 for the South American Joint Venture is as follows: (Amounts in thousands) 2017 2016 Investment in South American Joint Venture $ 6,559 $ 10,256 Net Receivable from South American Joint Venture 3,639 3,201 During the fourth quarter of the fiscal years ended March 31, 2017 and 2016, the Company determined there was an other-than-temporary decline in the fair value of its investment in the South American Joint Venture, resulting from a further decline of unfavorable regional economic conditions. Accordingly, the Company recorded an impairment charge of $1.3 million and $4.0 million, respectively, reducing the carrying value of the investment to its fair value. The impairment charge resulted in a basis difference between the cost of the investment and the amount of underlying equity in net assets of the South American Joint Venture of $4.9 million and $4.0 million as of March 31, 2017 and 2016 respectively. The basis difference will be amortized over the estimated remaining useful life of the underlying fixed assets, 9 years. The Company recognized $0.4 million and less than $0.1 million of amortization of the basis difference in fiscal 2017 and 2016, respectively. The impairment charge is included in Equity in net loss of unconsolidated affiliates in the Consolidated Statements of Operations. Tigre-ADS USA - On April 7, 2014, ADS Ventures, Inc., a wholly-owned subsidiary of the Company, and Tigre S.A. — Tubos e Conexoes entered into a stock purchase agreement to form a joint venture, Tigre-ADS USA. The joint venture was established to manufacture and sell PVC fittings for waterworks, plumbing, and HVAC applications primarily in the United States and Canadian markets. The Company acquired 49% of the outstanding shares of capital stock of Tigre-ADS USA for $3.6 million. The joint venture represents a continuation of the existing activities of Tigre-ADS USA through its Janesville, Wisconsin manufacturing facility. The Company is not required to consolidate Tigre-ADS USA as it is not the primary beneficiary, although the Company does hold a significant variable interest in Tigre-ADS USA through the equity investment. Summarized financial data as of the fiscal years ended March 31 for the Tigre-ADS USA joint venture is as follows: (Amounts in thousands) 2017 2016 Investment in Tigre-ADS USA $ 2,427 $ 2,932 Receivable from Tigre-ADS USA 9 45

Related Party Transactions

Related Party Transactions	12 Months Ended
	Mar. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	11. RELATED PARTY TRANSACTIONS ADS Mexicana - ADS conducts business in Mexico and Central America through its joint venture ADS Mexicana. ADS owns 51% of the outstanding stock of ADS Mexicana and consolidates its interest in ADS Mexicana for financial reporting purposes. During the fiscal years ended March 31, 2017, 2016, and 2015, ADS Mexicana compensated certain shareholders and former shareholders of Grupo Altima, the joint venture partner of ADS Mexicana, for consulting services related to the operations of the business and a noncompete arrangement, respectively. These cash payments totaled $0.2 million, $0.2 million, and $0.5 million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively. Occasionally, ADS and ADS Mexicana jointly enter into agreements for pipe sales with their related parties which totaled $0, $0, and $3.8 million in the years ended March 31, 2017, 2016, and 2015, respectively. Outstanding receivables related to these sales were $0.2 million and $0.3 million at March 31, 2017 and 2016, respectively. In February 2015, ADS Mexicana loaned $5.0 million to an entity owned by a Grupo Altima shareholder and such loan was repaid the same month. The applicable interest rate for the loan was 2.35%. In April 2015, ADS Mexicana borrowed $3.0 million under a revolving credit facility arrangement with Scotia Bank and loaned that amount to ADS. The loan was repaid in May 2015. In June 2015, ADS Mexicana borrowed $3.9 million under the Scotia Bank credit facility and loaned it to an entity owned by a Grupo Altima shareholder, and such loan was repaid in July 2015. The applicable interest rate for the loans was 4.81%. ADS does not guarantee the borrowings from this facility, and therefore does not anticipate any required contributions related to the balance of this credit facility. The Company is the guarantor of 100% of the ADS Mexicana Revolving Credit Facility, and the maximum potential payment under this guarantee totals $12.0 million. See Note 12. Debt. South American Joint Venture - The Company’s South American Joint Venture manufactures and sells HDPE corrugated pipe in the South American market. ADS is the guarantor for 50% of the South American Joint Venture’s credit facility, and the debt guarantee is shared equally with the joint venture partner. The maximum potential obligation under this guarantee totals $11.0 million as of March 31, 2017. The maximum borrowing permitted under the South American Joint Venture’s credit facility is $22.0 million. This credit facility allows borrowings in either Chilean pesos or US dollars at a fixed interest rate determined at inception of each draw on the facility. The guarantee of the South American Joint Venture’s debt expires on December 31, 2020. ADS does not anticipate any required contributions related to the balance of this credit facility. As of March 31, 2017 and 2016, the outstanding principal balance of the credit facility including letters of credit was $16.0 million and $16.7 million, respectively. As of March 31, 2017, there were no U.S. dollar denominated loans. The weighted average interest rate as of March 31, 2017 was 6.58% on Chilean peso denominated loans. ADS and the South American Joint Venture have entered into shared services arrangements in order to execute the joint venture services. Occasionally, the South American Joint Venture enters into agreements for pipe sales with ADS and its other related parties, which were $1.3 million and $1.2 million in the fiscal years ended March 31, 2017 and 2016, respectively. ADS pipe sales to the South American Joint Venture were $0.9 million and $1.8 million in the fiscal years ended March 31, 2017 and 2016, respectively. BaySaver - BaySaver is a joint venture that was established to produce and distribute water quality filters and separators used in the removal of sediment and pollution from storm water. ADS owns 65% of the outstanding stock of BaySaver and consolidates its interest in BaySaver. BaySaver may at times provide short-term financing to ADS to enhance liquidity. As of March 31, 2015, BaySaver held unsecured, interest-free, notes receivable from ADS of $0.5 million, which were fully paid in fiscal year 2016. ADS and BaySaver have entered into shared services arrangements in order to execute the joint venture services. Included within these arrangements are the lease of a plant and adjacent yard used to conduct business and operating expenses related to the leased facility. Occasionally, ADS and BaySaver jointly enter into agreements for sales of pipe and Allied Products with their related parties in immaterial amounts. Tigre-ADS USA - Tigre-ADS USA is a joint venture established to manufacture and sell PVC fittings for waterworks, plumbing, and HVAC applications primarily in the United States and Canadian markets. ADS owns 49% of the outstanding shares of capital stock of Tigre-ADS USA. The joint venture represents a continuation of the existing activities of Tigre-ADS USA through its Janesville, Wisconsin manufacturing facility. ADS purchased $1.6 million, $0.7 million and $0.1 million of Tigre-ADS USA manufactured products for use in the production of ADS products during fiscal years 2017, 2016 and 2015, respectively.

Debt

Debt	12 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Debt	12. DEBT The adoption on April 1, 2016 of the accounting standard updates relating to debt issuance costs required retrospective presentation, which led the Company to reduce its Other assets and its Long-term debt obligation on its Consolidated Balance Sheet as of March 31, 2016 by $3.1 million. The updates had no effect on the Company’s Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income (Loss), Consolidated Statements of Cash Flows and Consolidated Statements of Stockholders’ Equity and Mezzanine Equity. Long-term debt as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Secured Bank Term Loans Revolving Credit Facility — ADS $ 194,300 $ 166,000 Revolving Credit Facility — ADS Mexicana 1,500 — Term Note 72,500 82,500 Senior Notes payable 75,000 100,000 Industrial revenue bonds 1,845 2,715 Equipment financing 4,216 — ADS Mexicana Scotia Bank revolving credit facility 1,000 — Total 350,361 351,215 Unamortized debt issuance costs (1,723 ) (3,131 ) Current maturities (37,789 ) (35,870 ) Long-term debt obligations $ 310,849 $ 312,214 Secured Bank Term Loans - The Secured Bank Term Loans include a Revolving Credit Facility with borrowing capacity of $325.0 million for ADS, Inc., a Revolving Credit Facility for ADS Mexicana with borrowing capacity of $12.0 million (“the Revolving Credit Facilities”) and a $100.0 million term note (“Term Note”). The Revolving Credit Facilities expire and the Term Note is due in June 2018. Principal payments of $2.5 million per quarter are due on the Term Note throughout the remaining term. The Revolving Credit Facilities and the Term Note have a variable interest rate that depends upon the Company’s “pricing ratio” as defined in the agreements for the Revolving Credit Facilities. The interest rate is derived from the London Inter-Bank Offered Rate (“LIBOR”) or alternate base rate (“Prime Rate”) at the Company’s option. The average rates were 2.61%, 2.70%, and 2.64% at March 31, 2017, 2016, and 2015, respectively. The Secured Bank Term Loans are secured by a lien on a significant majority of the Company’s assets. Letters of credit outstanding at March 31, 2017 amounted to $10.6 million and reduce the availability of the Revolving Credit Facilities. The amount available for borrowing for ADS, Inc. and ADS Mexicana was $120.1 million and $10.5 million, respectively at March 31, 2017. Senior Notes Payable - In December 2009, we signed an agreement with Prudential Investment Management, Inc. for the issuance of senior promissory notes (“Senior Notes”), for an aggregate amount of up to $100.0 million. During fiscal 2010, the Company issued $75.0 million of Senior Notes with interest fixed at 5.6% and payable quarterly. The rate is subject to an additional 200 basis point excess leverage fee if the calculated leverage ratio exceeds 3 to 1 at the end of a fiscal quarter. A principal payment of $25.0 million was made in fiscal 2017 and additional payments are due in both fiscal 2018 and 2019. In July 2013, ADS issued an additional $25.0 million of Senior Notes. Interest for the additional $25.0 million is payable quarterly and is fixed at 4.05%. The rate is subject to an additional 200 basis point excess leverage fee if calculated leverage ratio exceeds 3 to 1 at the end of a fiscal quarter. A principal payment of $25.0 million is due in September of fiscal year 2020. Industrial Revenue Bonds - Between 1996 and 2007, ADS issued industrial revenue bonds for the construction of four production facilities. Two of the bonds were retired during fiscal 2011 and one of the bonds was retired in fiscal 2015. The remaining bond requires quarterly principal payments until it matures in February 2019 and has a variable interest rate based on the Securities Industry and Financial Markets Association (SIFMA) municipal swap index rate which is computed weekly. The rate on this bond at March 31, 2017, was 3.75%, including a letter of credit fee of 2.75%. Land and buildings with a net book value of approximately $9.4 million at March 31, 2017, collateralize the bonds. These bonds are not considered auction rate securities. ADS Mexicana Scotia Bank Revolving Credit Facility - On December 11, 2014, ADS’s joint venture, ADS Mexicana, entered into a credit agreement with Scotia Bank. The credit agreement provides for revolving loans up to a maximum aggregate principal amount of $5.0 million. The proceeds of the revolving credit facility have primarily been used for short term investments and are available for working capital needs. The interest rates of the revolving credit facilities are determined by LIBOR rates, Tasa de Interes Interbancaria de Equilibrio (TIIE) or the Costos de Captacion rates, plus an applicable margin. The Scotia Bank revolving credit facility matures on December 11, 2017. The obligations under the revolving credit facility are not guaranteed by ADS. As of March 31, 2017, there was $1.0 million of outstanding principal drawn on the Scotia Bank revolving credit facility, which bears interest at the LIBOR, plus 1.60%. The outstanding principal drawn is due in May 2017. On May 27, 2016, ADS Mexicana obtained a waiver on a covenant from Scotia Bank relating to ADS Mexicana failing to notify Scotia Bank of changes in legal organizational structure and payment of dividends. Debt Covenants and Dividend Restrictions - The Secured Bank Term Loans and the Senior Notes require, among other provisions, that the Company (1) maintains a 1.25 to 1 minimum fixed charge coverage ratio; (2) maintains a maximum leverage ratio of 4 to 1; and (3) establishes certain limits on permitted transactions, principally related to indebtedness, capital distributions, loans and investments, and acquisitions and dispositions of assets. Capital distributions, including dividends, are prohibited if the Company is not in compliance with the debt covenants. In any fiscal year, if the Company is in compliance with all debt covenants and the pro-forma leverage ratio exceeds 3 to 1, capital distributions are permitted up to a limit of $50.0 million. In addition, according to the terms of the ADS Mexicana Revolving Credit Facility, ADS Mexicana is not permitted to make loans to ADS, Inc. Principal Maturities - Maturities of long-term debt (excluding interest and deferred financing costs) as of March 31, 2017 are summarized below: Fiscal Years Ending March 31, (Amounts in thousands) 2018 2019 2020 2021 2022 Thereafter Total Principal maturities $ 37,789 $ 285,145 $ 25,935 $ 960 $ 532 $ — $ 350,361 Fiscal Year 2016 Amendments and Consents Related to the Secured Bank Term Loans and Senior Notes - From July 2015 through February 2016, the Company amended the Secured Bank Term Loans and Senior Notes and also obtained various consents from those lenders. These amendments and consents had the effect of: i) extending the time for delivery of the Company’s fiscal 2015 audited financial statements and first, second and third quarter fiscal 2016 quarterly financial information to April 1, 2016, whereby an event of default was waived as long as those items were delivered by that date without regard to any grace period, ii) modified certain definitions applicable to the Company’s affirmative and negative financial covenants, including the negative covenant on indebtedness, to accommodate the Company’s treatment of its transportation and equipment leases as capital leases rather than operating leases and to accommodate the treatment of the costs related to the Company’s restatement, and iii) permitted the Company’s payment of quarterly dividends on common shares in June, August and December 2015, as well as the annual dividend of $0.0195 per share to be paid on shares of preferred stock in March 2016. Fiscal Year 2017 Amendments and Consents Related to the Secured Bank Term Loans and Senior Notes - In July 2016, the Company obtained consents from the lenders of the Secured Bank Term Loans and Senior Notes. These consents had the effect of extending the time for delivery of the Company’s fiscal 2016 audited financial statements to August 31, 2016 and first quarter fiscal 2017 quarterly financial information to October 15, 2016, whereby an event of default was waived as long as those items are delivered within a 15 day grace period after those dates. The fiscal 2016 audited financial statements were delivered within the grace period. In addition, the consents also permitted the Company’s payment of quarterly dividends of $0.06 per share on common shares in each of June and September 2016, as well as the annual dividend of $0.0195 per share to be paid on shares of preferred stock in March 2017. In October 2016, the Company obtained additional consents from the lenders of the Secured Bank Term Loans and Senior Notes. These consents had the effect of extending the time for delivery of the Company’s first quarter fiscal 2017 quarterly financial information to November 30, 2016 and the Company’s second quarter fiscal 2017 quarterly financial information to December 31, 2016, whereby an event of default was waived as long as those items are delivered within a 30 day grace period after those dates. In addition, the consents also permitted the Company’s payment of a quarterly dividend of $0.06 per share on common shares in December 2016, as well as the annual dividend of $0.0195 per share to be paid on shares of preferred stock in March 2017. In December 2016, the Company obtained additional consents from lenders of the Secured Bank Term Loans and Senior Notes. These consents had the effect of extending the time and delivery of the Company’s first quarter fiscal 2017 quarterly financial information to January 31, 2017.

Derivative Transactions

Derivative Transactions	12 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Derivative Transactions	13. DERIVATIVE TRANSACTIONS The Company uses interest rate swaps, commodity options in the form of collars and swaps, and foreign currency forward contracts to manage its various exposures to interest rate, commodity price, and foreign currency exchange rate fluctuations. For interest rate swaps, gains and losses resulting from the difference between the spot rate and applicable base rate is recorded in interest expense. For collars, commodity swaps and foreign exchange forward contracts, contract settlement gains and losses are recorded in the Consolidated Statements of Operations in Derivative (gains) losses and other expense (income), net. Gains and losses related to mark-to-market adjustments for changes in fair value of the derivative contracts are also recorded in the Consolidated Statements of Operations in Derivative (gains) losses and other expense (income), net. A summary of the fair values for the various derivatives at March 31, 2017 and 2016 is presented below: 2017 Assets Liabilities (Amounts in thousands) Receivables Other assets Other accrued liabilities Other liabilities Diesel fuel option collars and swaps $ 149 $ 30 $ (122 ) $ (20 ) 2016 Assets Liabilities (Amounts in thousands) Receivables Other assets Other accrued liabilities Other liabilities Interest rate swaps $ — $ — $ (252 ) $ — Diesel fuel option collars and swaps — 11 (2,609 ) (6 ) Propylene swaps — — (8,027 ) — The Company recorded net losses and net (gains) on mark-to-market adjustments for changes in the fair value of derivative contracts as well as net losses and net (gains) on the settlement of derivative contracts as follows: Net Unrealized Mark to Market Losses (Gains) (Amounts in thousands) 2017 2016 2015 Interest rate swaps $ (252 ) $ (513 ) $ (236 ) Foreign exchange forward contracts — 28 (28 ) Diesel fuel option collars (2,642 ) (237 ) 2,841 Propylene swaps (8,027 ) 2,885 5,169 Total net unrealized mark to market losses (gains) $ (10,921 ) $ 2,163 $ 7,746 Net Realized Losses (Gains) (Amounts in thousands) 2017 2016 2015 Foreign exchange forward contracts $ — $ (150 ) $ 5,636 Diesel fuel option collars 1,893 3,142 736 Propylene swaps 6,671 11,742 1,333 Total net realized losses (gains) $ 8,564 $ 14,734 $ 7,705 Total realized and unrealized losses (gains) included in Derivative losses (gains) and other expense (income), net (1) $ (2,357 ) $ 16,897 $ 15,451 (1) The total balance in Derivative losses (gains) and other expense (income), net in the Consolidated Statements of Operations also includes other income items of ($3.6) million, ($0.3) million, and ($1.1) million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Mar. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	14. COMMITMENTS AND CONTINGENCIES Purchase Commitments The Company secures supplies of resin raw material by agreeing to purchase quantities during a future given period at a fixed price. These purchase contracts typically range from 1 to 12 months and occur in the ordinary course of business. Under such purchase contracts in place at March 31, 2017, the Company has agreed to purchase resin over the period April 2017 through December 2017 at a committed purchase cost of $18.1 million. Litigation On July 29, 2015, a putative stockholder class action, Christopher Wyche, individually and on behalf of all others similarly situated v. Advanced Drainage Systems, Inc., et al. (Case No. 1:15-cv-05955-KPF), was commenced in the U.S. District Court for the Southern District of New York (the “District Court”), naming the Company, along with Joseph A. Chlapaty, the Company’s Chief Executive Officer, and Mark B. Sturgeon, the Company’s former Chief Financial Officer, as defendants and alleging violations of the federal securities laws. An amended complaint was filed on April 28, 2016. The amended complaint alleges that the Company made material misrepresentations and/or omissions of material fact in its public disclosures during the period from July 25, 2014 through March 29, 2016, in violation of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, and Rule 10b-5 promulgated thereunder. On March 10, 2017, the District Court dismissed Plaintiff’s claims against all defendants in their entirety and with prejudice. Plaintiff has appealed the District Court’s order to the United States Court of Appeals for the Second Circuit, and the appeal is pending. On August 12, 2015, the SEC Division of Enforcement (“Enforcement Division”) informed the Company that it was conducting an informal inquiry with respect to the Company. As part of this inquiry, the Enforcement Division requested the voluntary production of certain documents generally related to the Company’s accounting practices. Subsequent to the initial voluntary production request, the Company received document subpoenas from the Enforcement Division pursuant to a formal order of investigation. The Company has from the outset cooperated with the Enforcement Division’s investigation and intends to continue to do so. While it is reasonably possible that this investigation ultimately could be resolved unfavorably to the Company, the Company is currently unable to estimate the range of possible losses, but they could be material. The Company is involved from time to time in various legal proceedings that arise in the ordinary course of our business, including but not limited to commercial disputes, environmental matters, employee related claims, intellectual property disputes and litigation in connection with transactions including acquisitions and divestitures. The Company does not believe that such litigation, claims, and administrative proceedings will have a material adverse impact on our financial position or our results of operations. The Company records a liability when a loss is considered probable, and the amount can be reasonably estimated.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Mar. 31, 2017
Postemployment Benefits [Abstract]
Employee Benefit Plans	15. EMPLOYEE BENEFIT PLANS Employee Stock Ownership Plan (ESOP) - The Company established the Advanced Drainage Systems, Inc. ESOP (the “ESOP” or the “Plan”) effective April 1, 1993. The Plan was funded through a transfer of assets from our tax-qualified profit-sharing retirement plan, as well as a 30-year term loan from ADS. The Plan operates as a tax-qualified leveraged ESOP and was designed to enable eligible employees to acquire stock ownership interest in ADS. 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. Upon retirement, disability, death, or vested terminations, (i) a participant or designated beneficiary may elect to receive the amount in their account attributable to the 1993 transfer of assets from our tax-qualified profit sharing retirement plan in the form of cash or ADS stock with any fractional shares paid in cash; (ii) stock credited to the participants’ ESOP stock account resulting from the ESOP’s loan repayments are distributed in the form of ADS stock, and (iii) amounts credited to the participants’ ESOP cash account are distributed in the form of cash. 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. The Company is obligated to make contributions to the Plan, which, when aggregated with the Plan’s dividends, equal the amount necessary to enable the Plan to make its regularly scheduled payments of principal and interest due on its term loan to ADS. As the Plan makes annual payments of principal and interest, an appropriate percentage of preferred stock is allocated to ESOP participants’ accounts in accordance with plan terms that are compliant with applicable Internal Revenue Code and regulatory provisions. The carrying value of redeemable convertible preferred stock held by the ESOP trust, but not yet earned by the ESOP participants or used for dividends, is reported as Deferred compensation — unearned ESOP shares within the mezzanine equity section of our Consolidated Balance Sheets. Compensation expense and related dividends paid with ESOP shares are recognized based upon the average annual fair value of the shares allocated. The shares allocated are for services rendered throughout the period and, therefore, a simple average is used to calculate the average annual fair value. Deferred compensation — unearned ESOP shares is relieved at fair value, with any difference between the annual average fair value and the carrying value of shares when allocated being added to Additional paid in capital. The fair value of the shares allocated was $16.80, $16.35, and $22.05 per share of redeemable convertible preferred stock at March 31, 2017, 2016, and 2015, respectively, resulting in an average annual fair value per share of $16.58, $19.20, and $16.61 per share for the fiscal years ended March 31, 2017, 2016, and 2015, respectively. During the fiscal years ended March 31, 2017, 2016, and 2015, the Company recognized compensation expense of $9.6 million, $10.3 million, and $12.1 million, respectively, related to allocation of ESOP shares to participants. Required dividends on allocated shares are generally passed through and paid in cash to the participants and required dividends on unallocated shares are paid in cash to the Plan and generally used to service the Plan’s debt. In the fiscal years ended March 31, 2017 and 2016, the ESOP committee directed the Plan trustee to retain $2.9 million and $2.5 million, respectively, in dividends on unallocated ADS shares rather than to service the Plan’s debt. These dividends were allocated to participants based on the total shares in their account in relation to total shares allocated at March 31, 2017 and 2016. In the fiscal years ended March 31, 2017 and 2016, 0.6 million and 0.5 million shares of redeemable convertible preferred stock, respectively, were allocated to the ESOP participants, including, in addition to the cash dividends, less than 0.1 million and less than 0.1 million preferred shares allocated as dividends, respectively. See Note 17. Mezzanine Equity for further details on the shares of Redeemable convertible preferred stock held by the ESOP. Executive Termination Payments - ADS has employment agreements with certain executives that include potential payments to be made to those executives upon termination. The terms of the termination payments vary by executive, but are generally based on current base salary and bonus levels at the time of termination. The contractual termination payments vest upon either (1) certain contingent occurrences terminating employment such as death, disability, layoff, the executive voluntarily quitting due to a breach of covenants by the Company or for other “good reason” or (2) the executive reaching a specified retirement age while still working for the Company, as defined in the individual employee agreement. The Company accrues a liability from the effective date of the executive’s employment agreement to the date the executive reaches the required retirement age while working for the Company, which is considered the service period for this obligation. The liability is estimated based on each executive’s current base salary and bonus levels. Because the executives vest in the termination payments equally over the relevant service period, the Company recognizes the related compensation expense based on the straight-line method over the service period. If an executive terminates their employment prior to reaching the required retirement age, no payment is required and the previously-recorded compensation expense for that executive is reversed and recorded as a benefit to compensation expense in the period the executive terminates employment. The compensation expense (benefit) recorded related to the executive termination payments for the fiscal years ended March 31, 2017, 2016, and 2015 was $1.1 million, ($0.3) million and $0.3 million, respectively, and is included in General and administrative expenses in the Consolidated Statements of Operations. As of March 31, 2017 and 2016, the executive termination payment obligation was $5.1 million and $4.0 million, respectively, and is included in Other accrued liabilities and Other liabilities in the Consolidated Balance Sheets. Profit-Sharing Plan - The Company has a tax-qualified profit-sharing retirement plan with a 401(k) feature covering substantially all U.S. eligible employees. The Company did not make employer contributions to this plan in the fiscal years ended March 31, 2017, 2016, and 2015. The Company has a defined contribution postretirement benefit plan covering Canadian employees. The Company recognized costs of $0.8 million, $0.6 million and $0.5 million in the fiscal years ended March 31, 2017, 2016 and 2015.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Stockholders' Equity	16. STOCKHOLDERS’ EQUITY During the fiscal years ended March 31, 2017 and 2016, there were no purchases of common stock. During the fiscal year ended March 31, 2015, the Company purchased a negligible amount of fractional shares subsequent to the IPO at a price of $17.21 per share. See Note 12. Debt for a description of restrictions on the payment of dividends imposed under the Secured Bank Term Loans and Senior Notes agreements. Executive Stock Repurchase Agreements - In fiscal 2007, the Company entered into stock repurchase agreements with certain executives, whereby the Company was required to repurchase shares of the Company’s common stock held by the executive at the current fair market value upon the executive’s death or certain events of termination, as defined. The amount of shares required to be repurchased by the Company from the executive and which the executive or the executive’s heir or estate was obligated to sell to the Company, was limited to the anticipated proceeds from life insurance policies held by the Company (referred to as a mandatorily redeemable obligation). In the case where shares were not repurchased due to the fair value of the shares exceeding the life insurance proceeds, the executive or the executive’s heir or estate had a put right up to a set dollar amount allowing the common stock to be put to the Company at the current fair market value (referred to as an executive’s put right). The stock repurchase agreements included termination clauses such that they would automatically terminate if a change in control event or an IPO occurred prior to the executive’s death. Prior to the termination of the stock repurchase agreements upon the IPO in July 2014, the Company classified all shares subject to the mandatorily redeemable obligation as liabilities and all shares subject to an executive’s put rights as mezzanine equity. For those shares classified as liabilities, changes in the fair value of the shares were recognized as compensation expense. The related compensation expense for the fiscal year ended March 31, 2015 was $1.0 million, and is included in General and administrative expenses in the Consolidated Statements of Operations. For those shares classified as mezzanine equity, the balance was recorded in Redeemable common stock and changes in the fair value of the shares were recorded as adjustments to Retained deficit and Paid-in capital. The changes in fair value recorded as adjustments to Retained deficit was $(1.3) million for the fiscal year ended March 31, 2015. After the termination of the stock repurchase agreements upon the IPO in July 2014, the Company reclassified the carrying amount of the mandatorily redeemable obligation portion of the shares of $18.2 million and the executive put right portion of the shares of $1.5 million to Paid-in capital in the Consolidated Balance Sheets.

Mezzanine Equity

Mezzanine Equity	12 Months Ended
	Mar. 31, 2017
Text Block [Abstract]
Mezzanine Equity	17. MEZZANINE EQUITY Redeemable Common Stock - Prior to the July 2014 IPO, one of the Company’s minority equity owners along with other shareholders who hold ownership in ADS of at least 15% (referred to as “Major Shareholders”) entered into an agreement which provided the Major Shareholders the right to put their common stock to the Company at fair value if, following the fifth anniversary of the recapitalization that occurred during 2010, a Major Shareholder demands that the Company effect an IPO covering the registration of at least $50.0 million of securities, and either the Company advises the Major Shareholder that ADS will not begin preparations for an IPO within 180 days after delivery, or after such preparations have begun they are discontinued (the “Major Shareholders’ Put Right”). As the Major Shareholders’ Put Right was a redemption right which prior to the IPO was outside the control of ADS, the Company classified common stock held by the Major Shareholders in the mezzanine equity section of the Consolidated Balance Sheets at its fair value, and changes in fair value were recorded in Retained earnings. The redemption feature of the Redeemable common stock allowing the holder to put its shares to the Company for cash, as discussed in the previous paragraph, became unenforceable upon effectiveness of the IPO on July 25, 2014. As a result, the Redeemable common stock was recorded at fair value through the effective date of the IPO and was subsequently reclassified at that fair value to stockholders’ equity. See Note 1. Background and Summary of Significant Accounting Policies for more information on the IPO. As a result of the IPO, there are 10.1 million shares of common stock held by Major Shareholders, which are now classified in stockholders’ equity. In addition, stock repurchase agreements with certain executives provided the executive or the executive’s heir or estate with put rights up to a set dollar amount allowing their common stock to be put to the Company. Prior to the termination of the stock repurchase agreements upon the IPO in July 2014, the Company classified all shares subject to the executive’s put rights as Redeemable common stock. After the termination of the stock repurchase agreements upon the IPO, the Company reclassified the carrying amount of the shares subject to the executive put rights to Paid-in capital in the Consolidated Balance Sheets. See Note 16. Stockholders’ Equity for further discussion. Redeemable Convertible Preferred Stock - The Trustee of the Company’s ESOP has the ability to put shares of the redeemable convertible preferred stock to the Company. The Redeemable convertible preferred stock has a required cumulative 2.5% dividend (based on the issue price of $0.781 per share) and is convertible at a rate of 0.7692 shares of common stock for each share of Redeemable convertible preferred stock. ADS guarantees the value of the redeemable convertible preferred stock at $0.781 per share. The put option requirements of the Internal Revenue Code apply in the event that the Company’s common stock is not a registration type class of security or its trading has been restricted. Therefore, the holders of Redeemable convertible preferred stock have a put right to require the Company to repurchase such shares in the event that the common stock is not listed for trading or otherwise quoted on the NYSE, AMEX, NASDAQ, or any other market more senior than the OTC Bulletin Board. As of March 31, 2017, the applicable redemption value was $0.781 per share as there were no unpaid cumulative dividends. Given that the event that may trigger redemption of the Redeemable convertible preferred stock (the listing or quotation on a market more senior than the OTC Bulletin Board) is not solely within the Company’s control, the redeemable convertible preferred stock is presented in the mezzanine equity section of the Consolidated Balance Sheets. As of March 31, 2017, the Company did not adjust the carrying value of the redeemable convertible preferred stock to its redemption value or recognize any changes in fair value as the Company did not consider it probable that the Redeemable convertible preferred stock would become redeemable. The Board of Directors approved the 2.5% annual dividend to be paid March 31 of each fiscal year to the stockholders of record as of March 15, 2017, 2016 and 2015. The annual dividend was paid in cash and stock on the allocated shares. During the first quarter of 2017, the Board of Directors approved the 2.5% annual dividend to be paid on March 31, 2017 to stockholders of record as of March 1, 2017. Cash and stock dividends on allocated Redeemable convertible preferred stock for the fiscal years ended March 31, 2017 and 2016, respectively, are summarized in the following table. For additional information on dividends paid to the unallocated Redeemable convertible preferred stock, please refer to Note 15. Employee Benefit Plans. (Amounts in thousands) 2017 2016 Quarterly cash dividends $ 1,494 $ 1,272 Annual cash dividends 18 21 Total cash dividends $ 1,512 $ 1,293 Annual stock dividend 134 132 Annual cash dividend 18 21 Total ESOP required dividends $ 152 $ 153 Allocated shares 7,779 7,831 Required dividend per share 0.0195 0.0195 Required dividends $ 152 $ 153 Redeemable Noncontrolling Interest in Subsidiaries - On July 17, 2015, the Company acquired an additional 10% of the issued and outstanding membership interests in BaySaver’s issued and outstanding membership interests, increasing the Company’s total ownership to 65%. Concurrent with the Company’s purchase of the additional membership investment, the BaySaver joint venture agreement was amended to change the voting rights from an equal vote for each member to a vote based upon the ownership interest. As a result, the Company has accounted for this transaction as a business combination and BaySaver is consolidated into our financial statements after July 17, 2015. The membership interests held by the joint venture partner are presented in Redeemable noncontrolling interest in subsidiaries in the Consolidated Balance Sheets, which is classified as mezzanine equity, due to a put option held by the joint venture partner which may be exercised on or after April 1, 2017. The Redeemable noncontrolling interest in subsidiaries balance will be accreted to the redemption value using the effective interest method until April 1, 2017. See Note 3. Acquisitions for further discussion of the BaySaver transaction.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Mar. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	18. STOCK-BASED COMPENSATION The Company has several programs for stock-based payments to employees and directors, including stock options and restricted stock. Stock-based compensation expense is recorded in General and administrative expenses, Selling expenses and Cost of goods sold in the Consolidated Statements of Operations. The Company recognized stock-based compensation expense (benefit) in the following line items on the Consolidated Statements of Operations for the fiscal years ended March 31, 2017, 2016, and 2015: (Amounts in thousands) 2017 2016 2015 Component of income before income taxes: Cost of goods sold $ 177 $ (300 ) $ 1,100 Selling expenses 177 (500 ) 1,500 General and administrative expenses 7,953 (5,068 ) 21,647 Total stock-based compensation expense (benefit) $ 8,307 $ (5,868 ) $ 24,247 The following table summarizes stock-based compensation expense (benefit) by award type for the fiscal years ended March 31, 2017, 2016, and 2015: (Amounts in thousands) 2017 2016 2015 Stock-based compensation expense (benefit): Liability-classified Stock Options $ 4,936 $ (6,784 ) $ 21,666 Equity-classified Stock Options 108 — — Restricted Stock 1,945 916 1,681 Non-Employee Director 1,318 — 900 Total stock-based compensation expense (benefit) $ 8,307 $ (5,868 ) $ 24,247 Stock Options Liability-Classified Options – Prior to fiscal 2017, the Company permitted employees to satisfy their personal tax liability associated with the exercise of the stock options through the net settlement of shares in excess of the minimum tax withholding required by law. In addition, prior to the Company’s initial public offering in fiscal 2015, the Company had periodically repurchased shares resulting from option exercises within six months of the exercise date. As such, the Company accounts for all 2000 Plan and 2013 Plan awards issued prior to fiscal 2017 as liability-classified awards. Liability-classified stock option awards are re-measured at fair value at each relevant reporting date, and the pro-rata vested portion of the award is recognized as a liability. The stock-based compensation liability associated with stock options expected to vest within the next twelve months is recorded in Current portion of liability-classified stock-based awards, with the portion related to those expected to vest beyond twelve months recorded in Other liabilities in the Consolidated Balance Sheets. When stock options are exercised, the liability is reclassified to additional paid in capital at fair value. The proceeds from the exercise are also recorded as additional paid in capital. Compensation expense for stock options is recognized on a straight-line basis over the employee’s requisite service period, which is generally the vesting period of the grant. For liability-classified options, the Company estimates the fair value of stock options using a Black-Scholes option-pricing model at the end of each period. The following table summarizes the assumptions used in estimating the fair value of liability-classified stock options: 2017 2016 2015 Common stock price $18.70 - $28.17 $18.34 - $33.03 $14.33 - $29.94 Expected stock price volatility 29.6% - 33.0% 31.1% - 39.3% 28.2% - 51.0% Risk-free interest rate 0.9% - 1.9% 0.5% - 1.5% 0.1% - 1.8% Weighted-average expected option life (years) 0.5 – 5.1 0.5 – 6.2 0.5 - 7.2 Dividend yield 0.9% 0.9% 0.5% 2000 Plan - The Company’s 2000 stock option plan (“2000 Plan”) provides for the issuance of statutory and non-statutory stock options to management based upon the discretion of the Board of Directors. The plan generally provides for grants with the exercise price equal to fair value on the date of grant, which vest in three equal annual amounts beginning in year five and expire after approximately 10 years from issuance. The Company had approximately 1.1 million shares available for grant under the 2000 Plan as of March 31, 2017. The stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year 515 $ 11.82 4.2 Granted — — — Exercised (292 ) 10.63 — Forfeited (28 ) 12.50 — Outstanding at end of year 195 13.31 5.4 Vested at end of year 136 12.26 4.7 Unvested at end of year 59 15.74 7.0 Fair value of options granted during the year $ — All outstanding options are expected to vest. The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 76 $ 6.76 Granted — — Vested — — Forfeitures (17 ) 6.76 Unvested at end of year 59 $ 6.76 As of March 31, 2017, there was a total of $0.3 million of unrecognized compensation expense related to unvested stock option awards under the 2000 plan that will be recognized as an expense as the awards vest over the remaining weighted average service period of 1.3 years. The total fair value of liability-classified options issued under the 2000 Plan that vested during the fiscal year ended March 31, 2015 was $8.1 million. No options vested during the fiscal years ended March 31, 2017 and 2016. The weighted average grant date fair value of stock options granted during the fiscal year ended March 31, 2015 was $6.76. No options were granted during the fiscal years ended March 31, 2017 and 2016. The aggregate intrinsic value for options outstanding and currently exercisable as of March 31, 2017 was $1.7 million and $1.3 million, respectively. The total intrinsic value of options exercised during the fiscal years ended March 31, 2017, 2016, and 2015 were $3.7 million, $3.7 million and $3.4 million, respectively. 2013 Plan - The Company’s 2013 stock option plan (“2013 Plan”) provides for the issuance of non-statutory common stock options to management subject to the Board’s discretion. The plan generally provides for grants with the exercise price equal to fair value on the date of grant. The grants generally vest in five equal annual amounts beginning in year one and expire after approximately 10 years from issuance. Options issued to the Chief Executive Officer vest equally over four years and expire after approximately 10 years from issuance. In May 2014, the Board of Directors approved the increase of shares available for granting under the 2013 plan to 1.4 million shares. The Company had 1.0 million shares available for grant under the 2013 Plan as of March 31, 2017. The liability-classified stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year 1,911 $ 13.64 7.4 Issued — — — Exercised (66 ) 13.64 — Forfeited (99 ) 13.64 — Outstanding at end of year 1,746 13.64 6.0 Vested at end of year 1,125 13.64 6.0 Unvested at end of year 621 13.64 6.0 Fair value of options granted during the year $ — All outstanding options are expected to vest. The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 1,095 $ 6.22 Vested (375 ) — Forfeited (99 ) 6.22 Unvested at end of year 621 $ 6.22 As of March 31, 2017, there was a total of $3.6 million of unrecognized compensation expense related to unvested stock option awards under the 2013 Plan that will be recognized as an expense as the awards vest over the remaining weighted average service period of 1.1 years. The aggregate intrinsic value for options outstanding and currently exercisable as of March 31, 2017 was $14.4 million and $9.3 million, respectively. The total fair value of options that vested during the fiscal years ended March 31, 2017, 2016, and 2015 were $3.4 million, $3.6 million, and $7.2 million, respectively. The total intrinsic value of options exercised during the fiscal year ended March 31, 2017 was $0.8 million. Equity-Classified Options - The Company accounts for awards under the 2013 Plan granted during the fiscal year ended March 31, 2017 as equity-classified awards as employees are no longer permitted to satisfy their personal tax liability in excess of the minimum statutory withholding. Equity-classified stock option awards are measured based on the grant-date estimated fair value of each award. Compensation expense for stock options is recognized on a straight-line basis over the employee’s requisite service period, which is generally the vesting period of the grant. The Company determines the fair value of the options based on the Black-Scholes option pricing model at the grant date. This methodology requires significant inputs including the price of the Company’s common stock, risk-free interest rate, dividend yield and expiration date. The following table summarizes the assumptions used in estimating the fair value of the equity-classified stock options: 2017 Common stock price $24.20 Expected stock price volatility 31.5% - 35.6% Risk-free interest rate 2.0% - 2.2% Weighted-average expected option life (years) 4.9 – 6.1 Dividend yield 1.0% The equity-classified stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year — — Granted 514 $ 24.20 — Exercised — — — Forfeited — — — Outstanding at end of year 514 24.20 9.0 Vested at end of year 15 24.20 9.0 Unvested at end of year 499 24.20 9.0 Fair value of options granted during the year $ 7.81 All outstanding options are expected to vest except options granted to an executive with a planned retirement. The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year — — Granted 514 $ 7.81 Vested (15 ) 6.72 Forfeited — — Unvested at end of year 499 $ 7.84 As of March 31, 2017, there was a total of $2.6 million of unrecognized compensation expense related to unvested equity-classified stock option awards that will be recognized as an expense as the awards vest over the remaining weighted average service period of 2.9 years. The weighted average grant fair value of stock options granted during the fiscal years ended March 31, 2017, 2016, and 2015 were $7.81, $0.00, and $0.00, respectively. The total fair value of options that vested during the fiscal years ended March 31, 2017, 2016, and 2015 were $0.1 million, less than $0.1 million, and less than $0.1 million, respectively. There were no options exercised during the fiscal years ended March 31, 2017, 2016, and 2015. Restricted Stock On September 16, 2008, the Board of Directors adopted the restricted stock plan, which provides for the issuance of restricted stock awards to certain key employees. The restricted stock generally vest ratably over a five-year period from the original restricted stock grant date, contingent on the employee’s continuous employment by ADS. In certain instances, however, a portion of the grants vested immediately or for accounting purposes were deemed to have vested immediately, including the grants to the Chief Executive Officer, which do not have a substantial risk of forfeiture as a result of different vesting provisions. Under the restricted stock plan, vested shares are considered issued and outstanding. Employees with restricted stock have the right to dividends on the shares awarded (vested and unvested) in addition to voting rights on non-forfeited shares. Prior to the Company’s initial public offering in fiscal 2015, the Company periodically repurchased shares from employees within six months of the shares vesting. As such, for the periods prior to the Company’s initial public offering, the restricted stock awards were accounted for as liability-classified awards. In the periods subsequent to the initial public offering, the Company discontinued repurchasing employee held restricted shares due to the existence of a public market for the shares. Accordingly, upon the initial public offering the Company has modified the restricted stock awards from being accounted for as liability-classified to equity-classified awards and reclassified the carrying amount of the awards of $4.8 million to Paid-in capital in the Consolidated Balance Sheets. The restricted stock has been accounted for as equity-classified awards for the periods subsequent to the initial public offering. The fair value of restricted stock is based on the fair value of the Company’s common stock. Compensation expense is recognized on a straight-line basis over the employee’s requisite service period, which is generally the vesting period of the grant. The Company had approximately 0.2 million shares available for grant under this plan as of March 31, 2017. The information about the unvested restricted stock grants as of March 31, 2017 is as follows: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 112 $ 12.65 Granted 191 24.20 Vested (49 ) 16.15 Forfeited — Unvested at end of year 254 $ 21.92 The Company expects all restricted stock grants to vest. At March 31, 2017, there was approximately $3.5 million of unrecognized compensation expense related to the restricted stock that will be recognized over the weighted average remaining service period of 2.4 years. During the fiscal year ended March 31, 2017, the weighted average grant date fair value of restricted stock granted was $24.20. No restricted stock was granted during the fiscal years ended March 31, 2016 and 2015. During the fiscal years ended March 31, 2017, 2016, and 2015 the total fair value of restricted stock that vested was $1.2 million, $1.1 million and $1.9 million, respectively. Non-Employee Director Compensation Plan On June 18, 2014, the Company amended its then-existing Stockholders’ Agreement to authorize 0.3 million shares of restricted stock to be granted to non-employee members of its Board of Directors. The shares typically will vest one year from the date of issuance. Under this stock plan, the vested shares granted are considered issued and outstanding. Non-employee directors with this stock have the right to dividends on the shares awarded (vested and unvested) in addition to voting rights. The Company has determined that the restricted stock granted to directors should be accounted for as equity-classified awards. The Company had approximately 0.2 million and 0.2 million shares available for grant under this plan as of March 31, 2017 and 2016. The following table summarizes information about the unvested Non-Employee Director Compensation stock grants as of March 31, 2017 : 2017 (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year — — Granted 77 $ 24.20 Vested (37 ) 24.20 Unvested at end of year 40 $ 24.20 As of March 31, 2017, there was approximately $0.5 million of unrecognized compensation expense related to this restricted stock that will be recognized over the weighted average remaining service period of 0.6 years.

Income Taxes

Income Taxes	12 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	19. INCOME TAXES The components of Income before income taxes for the fiscal years ended March 31 are as follows: (Amounts in thousands) 2017 2016 2015 United States $ 59,543 $ 45,159 $ (4,381 ) Foreign 5,288 14,140 9,304 Total $ 64,831 $ 59,299 $ 4,923 The components of Income tax expense for the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 2015 Current: Federal $ 24,318 $ 6,889 $ 20,592 State and local 4,652 2,126 3,655 Foreign 3,040 3,791 831 Total current tax expense 32,010 12,806 25,078 Deferred: Federal (5,887 ) 10,019 (16,270 ) State and local (1,297 ) 1,431 (2,626 ) Foreign (211 ) (758 ) 102 Total deferred tax expense (benefit) (7,395 ) 10,692 (18,794 ) Total Income tax expense $ 24,615 $ 23,498 $ 6,284 For the fiscal years ended March 31, the effective tax rate varied from the statutory Federal income tax rate as a result of the following factors: 2017 2016 2015 Federal statutory rate 35.0 % 35.0 % 35.0 % Redeemable convertible preferred stock dividend (0.8 ) (0.8 ) (3.8 ) ESOP stock appreciation 4.9 5.8 82.3 ESOP compensation for Special Dividend on unallocated shares — — 0.2 Effect of tax rate of foreign subsidiaries 1.3 0.8 (9.3 ) State and local taxes—net of federal income tax benefit 4.1 4.3 19.7 Stock-based compensation 0.3 (1.8 ) 64.7 Uncertain tax position change (1.1 ) (3.6 ) (35.2 ) Qualified production activity credit (3.3 ) (0.9 ) (37.1 ) Executive repurchase agreement — — 7.2 Closure of Puerto Rico (4.2 ) — — Other 1.8 0.8 3.9 Effective rate 38.0 % 39.6 % 127.6 % The Company’s effective tax rate will vary based on factors, including but not limited to, overall profitability, the geographical mix of income before taxes and discrete events. The fiscal 2015 effective tax rate exceeded the federal statutory rate due in part to the significant permanent differences associated with non-deductible ESOP stock appreciation and stock-based compensation expense, the effect of which was increased by the near break-even amount of pre-tax income, whereas the fiscal year 2017 and 2016 effective tax rates more closely approximate a normal effective tax rate for the Company. The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at March 31 were comprised of: (Amounts in thousands) 2017 2016 Deferred tax assets: State income taxes $ 1,474 $ 1,927 ESOP loan repayment 1,363 1,390 Receivable and other allowances 2,660 2,150 Derivatives (15 ) 4,397 Inventory 5,820 1,433 Non-qualified stock options 6,052 4,309 Executive termination payments (Note 15) 2,044 1,852 Accrued Expenses 411 1,378 Worker’s compensation 1,323 1,390 Contingent consideration 91 533 Foreign net operating losses 2,223 1,507 Other 2,856 2,491 Total deferred tax assets 26,302 24,757 Less: valuation allowance (2,223 ) (1,507 ) Total net deferred tax assets 24,079 23,250 Deferred tax liabilities: Intangible assets 7,214 8,882 Property, plant and equipment 51,599 52,115 Leases 724 6,059 Capitalized software costs 3,200 2,935 Goodwill 3,886 3,643 Other 761 1,867 Total deferred tax liabilities 67,384 75,501 Net deferred tax liability $ 43,305 $ 52,251 Net deferred tax assets are included in Deferred income taxes and other current assets and Other assets on the Consolidated Balance Sheets. The related balances at March 31 were as follows: (Amounts in thousands) 2017 2016 Net current deferred tax assets $ — $ 11,701 Net non-current deferred tax assets 702 — Net non-current deferred tax liabilities 44,007 63,952 The Company has not provided for U.S. federal income taxes or foreign withholding taxes on approximately $28.0 million of undistributed earnings of its foreign subsidiaries at March 31, 2017 because such earnings are intended to be reinvested indefinitely with the exception of cash dividends paid by our ADS Mexicana joint venture. It is not practicable to estimate the amount of U.S. tax that might be payable on the eventual remittance of such earnings. Accounting for Uncertain Tax Positions As of March 31, 2017, the Company had unrecognized tax benefit of $6.2 million, which if resolved favorably, would reduce income tax expense by $6.2 million. A reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years ended March 31, 2017, 2016, and 2015 is as follows: (Amounts in thousands) Balance as of March 31, 2014 $ 12,855 Decreases in tax positions for prior years (672 ) Increases in tax positions for prior years 336 Settlements — Lapse of statute of limitations (2,067 ) Balance as of March 31, 2015 $ 10,452 Tax positions taken in current year 917 Decreases in tax positions for prior years (599 ) Increases in tax positions for prior years 358 Settlements — Lapse of statute of limitations (3,130 ) Balance as of March 31, 2016 $ 7,998 Tax positions taken in current year — Decreases in tax positions for prior years (1,786 ) Increases in tax positions for prior years 80 Settlements — Lapse of statute of limitations (96 ) Balance as of March 31, 2017 $ 6,196 The unrecognized tax benefits are primarily recorded in Other liabilities in the Company’s Consolidated Balance Sheets. These amounts include potential accrued interest and penalties of $1.8 million and $2.7 million at March 31, 2017 and 2016, respectively. It is reasonably possible that there could be a change in the amount of unrecognized tax benefits within the next twelve months due to activities of the IRS or other taxing authorities, including proposed assessments of additional tax, possible settlement of audit issues, or the expiration of applicable statutes of limitation. The Company is currently open to audit under the statute of limitations by the IRS for the fiscal years ended March 31, 2014 through March 31, 2017. The majority of the Company’s state income tax returns are open to audit under the statute of limitations for the years ended March 31, 2014 through March 31, 2017. The foreign income tax returns are open to audit under the statute of limitations for the years ended March 31, 2013 through March 31, 2017.

Net Income (Loss) Per Share

Net Income (Loss) Per Share	12 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Net Income (Loss) Per Share	20. NET INCOME (LOSS) PER SHARE Basic net income (loss) per share is calculated by dividing the Net income (loss) available to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration for common stock equivalents. Diluted net income (loss) per share is computed by dividing the Net income (loss) available to common stockholders by the weighted-average number of common stock equivalents outstanding for the period. Holders of unvested restricted stock have non-forfeitable rights to dividends when declared on common stock, and holders of redeemable convertible preferred stock participate in dividends on an as-converted basis when declared on common stock. As a result, unvested restricted stock and redeemable convertible preferred stock meet the definition of participating securities, which requires us to apply the two-class method to compute both basic and diluted net income (loss) per share. The two-class method is an earnings allocation formula that treats participating securities as having rights to earnings that would otherwise have been available to common stockholders. The dilutive effect of stock options and unvested restricted stock is based on the more dilutive of the treasury stock method or the diluted two-class method. In computing diluted net income per share, income available to common stockholders used in the basic net income per share calculation (numerator) is adjusted, subject to sequencing rules, for certain adjustments that would result from the assumed issuance of potential common shares. Diluted net income per share assumes the redeemable convertible preferred stock would be cash settled through the effective date of the IPO on July 25, 2014, as the Company has the choice of settling in cash or shares and it has demonstrated past practice and intent of cash settlement. Therefore these shares are excluded from the calculation through the effective date of the IPO. After the effective date of the IPO, management’s intent is to share settle; therefore, these shares are included in the calculation from July 26, 2014 through March 31, 2017, if dilutive. For purposes of the calculation of diluted net income per share, stock options and unvested restricted stock are considered to be potential common stock and are only included in the calculations when their effect is dilutive. The Company’s redeemable common stock is included in the weighted-average number of common shares outstanding for calculating basic and diluted net income per share. The following table presents information necessary to calculate net income (loss) per share for the fiscal years ended March 31, 2017, 2016, and 2015, as well as potentially dilutive securities excluded from the weighted average number of diluted common shares outstanding because their inclusion would have been anti-dilutive: (Amounts in thousands, except per share data) 2017 2016 2015 NET INCOME (LOSS) PER SHARE — BASIC: Net income (loss) attributable to ADS $ 32,950 $ 25,052 $ (7,827 ) Adjustment for: Change in fair value of redeemable convertible preferred stock — — (11,054 ) Accretion of redeemable noncontrolling interest in subsidiaries (1,560 ) (932 ) — Dividends paid to redeemable convertible preferred stockholders (1,646 ) (1,425 ) (661 ) Dividends paid to unvested restricted stockholders (73 ) (24 ) (11 ) Net income (loss) available to common stockholders and participating securities 29,671 22,671 (19,553 ) Undistributed income allocated to participating securities (1,700 ) (1,270 ) — Net income (loss) available to common stockholders — Basic 27,971 21,401 (19,553 ) Weighted average number of common shares outstanding — Basic 54,919 53,978 51,344 Net income (loss) per common share — Basic $ 0.51 $ 0.40 $ (0.38 ) NET INCOME (LOSS) PER SHARE — DILUTED: Net income (loss) available to common stockholders — Diluted 27,971 21,401 (19,553 ) Weighted average number of common shares outstanding — Basic 54,919 53,978 51,344 Assumed exercise of stock options 705 1,198 — Weighted average number of common shares outstanding — Diluted 55,624 55,176 51,344 Net income (loss) per common share — Diluted $ 0.50 $ 0.39 $ (0.38 ) Potentially dilutive securities excluded as anti- dilutive 6,228 6,383 5,395

Business Segment Information

Business Segment Information	12 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Business Segment Information	21. BUSINESS SEGMENT INFORMATION ADS operates its business in two distinct operating and reportable segments based on the markets it serves: “Domestic” and “International.” The Chief Operating Decision Maker (“CODM”) evaluates segment reporting based on Net sales and Segment Adjusted EBITDA. The Company calculates Segment Adjusted EBITDA as net income or loss before interest, income taxes, depreciation and amortization, stock-based compensation expense, non-cash charges and certain other expenses. Domestic The Company’s Domestic segment manufactures and markets products throughout the United States. The Company maintains and serves these markets through product distribution relationships with many of the largest national and independent waterworks distributors, major national retailers as well as an extensive network of hundreds of small to medium-sized distributors across the U.S. The Company also sells through a broad variety of buying groups and co-ops in the United States. Products include single wall pipe, N-12 HDPE pipe sold into the Storm sewer and Infrastructure markets, High Performance PP pipe sold into the Storm sewer and sanitary sewer markets, and our broad line of Allied Products including StormTech, Nyloplast, ARC Septic Chambers, Inserta Tee, BaySaver filters and water quality structures, Fittings, and FleXstorm. The Company’s Domestic segment sales are diversified across all regions of the country. International The Company’s International segment manufactures and markets products in certain regions outside of the United States, with a growth strategy focused on Company owned facilities in Canada and through the Company’s joint-ventures with local partners in Mexico and South America. The Company’s joint venture strategy provides it with local and regional access to new markets such as Brazil, Chile, Argentina, Peru and Colombia. The Company’s Mexican joint venture (ADS Mexicana) primarily serves the Mexican and Central American markets, while its South American Joint Venture (Tigre-ADS) is the primary channel to serve the South American markets. The Company’s International product line includes single wall pipe, N-12 HDPE pipe, and High Performance PP pipe. The Canadian market also sells our broad line of Allied Products, while sales in Latin America are currently concentrated in fittings and Nyloplast. The following table sets forth reportable segment information with respect to the amount of Net sales contributed by each class of similar products in each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Domestic Pipe $ 786,546 $ 812,071 $ 771,214 Allied Products 315,690 301,725 256,719 Total domestic 1,102,236 1,113,796 1,027,933 International Pipe 122,384 139,731 125,407 Allied Products 32,641 37,151 26,733 Total international 155,025 176,882 152,140 Total net sales $ 1,257,261 $ 1,290,678 $ 1,180,073 The following sets forth certain additional financial information attributable to the reportable segments for the fiscal years ended March 31 . (Amounts in thousands) 2017 2016 2015 Segment Adjusted EBITDA Domestic $ 175,676 $ 162,875 $ 128,973 International 17,695 24,465 14,904 Total $ 193,371 $ 187,340 $ 143,877 Interest expense Domestic $ 17,049 $ 17,908 $ 19,308 International 418 552 60 Total $ 17,467 $ 18,460 $ 19,368 Income tax expense Domestic $ 21,786 $ 20,465 $ 5,351 International 2,829 3,033 933 Total $ 24,615 $ 23,498 $ 6,284 Depreciation and amortization Domestic $ 63,747 $ 62,625 $ 59,397 International 8,608 8,384 6,075 Total $ 72,355 $ 71,009 $ 65,472 Equity in net (loss) income of unconsolidated affiliates Domestic $ (505 ) $ 181 $ 289 International (3,803 ) (5,415 ) (2,624 ) Total $ (4,308 ) $ (5,234 ) $ (2,335 ) Capital expenditures Domestic $ 39,642 $ 37,242 $ 29,345 International 7,034 7,700 2,735 Total $ 46,676 $ 44,942 $ 32,080 The following sets forth certain additional financial information attributable to the reportable segments as of March 31: (Amounts in thousands) 2017 2016 Investments in unconsolidated affiliates Domestic $ 2,427 $ 2,932 International 6,559 10,256 Total $ 8,986 $ 13,188 Total identifiable assets Domestic $ 917,006 $ 949,286 International 134,987 147,814 Eliminations (5,708 ) (59,784 ) Total $ 1,046,285 $ 1,037,316 Reconciliation of Segment Adjusted EBITDA to Net income 2017 2016 2015 (Amounts in thousands) Domestic International Domestic International Domestic International Net income (loss) $ 35,118 $ 790 $ 24,875 $ 5,692 $ (9,443 ) $ 5,747 Depreciation and amortization 63,747 8,608 62,625 8,384 59,397 6,075 Interest expense 17,049 418 17,908 552 19,308 60 Income tax expense 21,786 2,829 20,465 3,033 5,351 933 Segment EBITDA 137,700 12,645 125,873 17,661 74,613 12,815 Derivative fair value adjustments (10,921 ) — 2,139 24 7,774 (28 ) Foreign currency transaction (gains) losses — (1,629 ) — 697 5,636 (232 ) Loss (gain) on sale of business or disposal of assets 4,793 3,716 892 (80 ) 257 105 Unconsolidated affiliates interest, taxes, depreciation and amortization (a) 1,088 1,663 1,052 2,163 1,341 2,244 Contingent consideration remeasurement (265 ) — 371 — 174 — Stock-based compensation expense (benefit) 8,307 — (5,868 ) — 24,247 — ESOP deferred stock-based compensation 9,568 — 10,250 — 12,144 — Expense (benefit) related to executive termination payments 1,092 — (294 ) — 328 — Expense related to executive stock repurchase agreements — — — — 1,011 — Loss related to BaySaver step acquisition — — 490 — — — Inventory step up related to PTI acquisition 525 — — — — — Bargain purchase gain on PTI acquisition (609 ) — — — — — Restatement-related costs (b) 24,026 — 27,970 — — — Impairment on investment in unconsolidated affiliate — 1,300 — 4,000 — — Transaction costs (c) 372 — — — 1,448 — Segment Adjusted EBITDA (d) $ 175,676 $ 17,695 $ 162,875 $ 24,465 $ 128,973 $ 14,904 (a) Includes the Company’s proportional share of interest, income taxes, depreciation and amortization related to its South American Joint Venture and its Tigre-ADS USA Joint Venture, which are accounted for under the equity method of accounting. In addition, these amounts include the Company’s proportional share of interest, income taxes, depreciation and amortization related to its BaySaver Joint Venture prior to the step acquisition of BaySaver on July 17, 2015, which was previously accounted for under the equity method of accounting. (b) Represents expenses recorded related to legal, accounting and other professional fees incurred in connection with the restatement of the prior period financial statements as reflected in the fiscal year 2015 Form 10-K and fiscal year 2016 Form 10-K/A. (c) Represents expenses recorded related to legal, accounting and other professional fees incurred in connection with the debt refinancing, the IPO and secondary public offering and asset acquisitions and dispositions. (d) A portion of the reduction in International EBITDA is related to transfer pricing. The reduction is fully offset by an increase in Domestic EBITDA. Geographic Sales and Assets Information Net sales are attributed to the geographic location based on the location of the customer. The table below represents the Net sales and long-lived asset information by geographic location for each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Net Sales North America $ 1,243,074 $ 1,274,700 $ 1,161,909 Other 14,187 15,978 18,164 Total $ 1,257,261 $ 1,290,678 $ 1,180,073 (Amounts in thousands) 2017 2016 Long-Lived Assets (a) North America $ 411,752 $ 395,716 Other 6,559 10,256 Total $ 418,311 $ 405,972 (a) For segment reporting purposes, long-lived assets include Investments in unconsolidated affiliates, Central parts and Property, plant and equipment.

Supplemental Disclosures of Cas

Supplemental Disclosures of Cash Flow Information	12 Months Ended
	Mar. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Supplemental Disclosures of Cash Flow Information	22. SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION The increase (decrease) in cash due to the changes in working capital accounts for the fiscal years ended March 31, were as follows: (Amounts in thousands) 2017 2016 2015 Changes in working capital: Receivables $ 15,055 $ (37,788 ) $ (10,351 ) Inventories (27,917 ) 28,330 (7,663 ) Prepaid expenses and other current assets (2,548 ) 646 1,953 Accounts payable, accrued expenses, and other liabilities 6,851 10,156 (767 ) Total $ (8,559 ) $ 1,344 $ (16,828 ) Supplemental disclosures of cash flow information for the fiscal years ended March 31 were as follows: (Amounts in thousands) 2017 2016 2015 Supplemental disclosures of cash flow information — cash paid during years: Interest $ 17,273 $ 18,352 $ 18,709 Income taxes 13,525 32,175 28,503 (Amounts in thousands) 2017 2016 2015 Supplemental schedule of noncash investing and financing activities: Redeemable convertible preferred stock dividend $ 134 $ 132 $ 127 Redemption of common stock to exercise stock options — — 93 Purchases of plant, property, and equipment included in accounts payable 2,549 1,165 124 Receivable recorded for sale of businesses — 150 600 ESOP distributions in common stock 7,425 10,250 6,133 Assets acquired and obligation incurred under capital lease 26,276 34,207 24,047 Lease obligation retired upon disposition of leased assets 390 134 779 Reclassification of liability-classified stock options and restricted stock to equity 4,147 3,702 12,141 Reclassification of stock repurchase agreement liability and mezzanine equity to equity — — 19,729 Payable recorded for business acquisition 950 — — Reclassification of deferred public offering cost asset upon initial public offering — — 456

Quarterly Financial Information

Quarterly Financial Information (Unaudited)	12 Months Ended
	Mar. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (Unaudited)	23. QUARTERLY FINANCIAL INFORMATION (UNAUDITED) The following tables set forth certain historical unaudited consolidated condensed quarterly financial information for each of the quarters during the years ended March 31, 2017 and 2016. In the Company’s opinion, the unaudited quarterly financial information reflects all normal and recurring accruals and adjustments necessary for a fair presentation of net income for interim periods. Fiscal Year 2017 For the Three Months Ended (in thousands, except per share amounts) March 31, 2017 December 31, 2016 September 30, 2016 June 30, 2016 Net sales $ 244,184 $ 294,716 $ 360,785 $ 357,576 Gross profit 39,251 69,441 90,512 96,606 Net (loss) income (18,052 ) 10,258 24,281 19,421 Net (loss) income attributable to ADS (18,110 ) 9,053 23,734 18,273 Net (loss) income per share Basic (1) $ (0.34 ) $ 0.14 $ 0.38 $ 0.29 Diluted (1) $ (0.34 ) $ 0.14 $ 0.38 $ 0.29 Fiscal Year 2016 For the Three Months Ended (in thousands, except per share amounts) March 31, 2016 December 31, 2015 September 30, 2015 June 30, 2015 Net sales $ 245,398 $ 312,827 $ 383,329 $ 349,124 Gross profit 49,504 74,842 86,529 74,477 Net (loss) income (11,085 ) 12,942 15,928 12,782 Net (loss) income attributable to ADS (12,119 ) 13,131 12,346 11,694 Net (loss) income per share Basic (1) $ (0.24 ) $ 0.21 $ 0.20 $ 0.19 Diluted (1) $ (0.24 ) $ 0.21 $ 0.19 $ 0.19 (1) The earnings per share calculations for each quarter are based upon the applicable weighted average shares outstanding for each period and may not necessarily be equal to the full year share amount.

Subsequent Events

Subsequent Events	12 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	24. SUBSEQUENT EVENTS Dividends on Common Stock - During the first quarter of fiscal 2018, the Company declared a quarterly cash dividend of $0.07 per share of common stock. The dividend is payable on June 15, 2017 to stockholders of record at the close of business on June 5, 2017. Liability-classified stock awards – On April 1, 2017, the Company modified all outstanding awards to remove the provision that permitted employees to satisfy their personal tax liability with the net settlement of shares in excess of minimum tax withholding. Consistent with the accounting standard update in Note 1, employees can now withhold shares with a fair value up to the maximum statutory rate. Revolving Credit Facility Waiver – On May 19, 2017, the Company obtained a waiver from the lenders of the Revolving Credit Facility regarding an event of default. A material domestic subsidiary failed to join as a guarantor resulting in default. The lenders agreed to waive the default if the material domestic subsidiary joins as a guarantor by July 31, 2017.

Schedule II - Consolidated Valu

Schedule II - Consolidated Valuation and Qualifying Accounts	12 Months Ended
	Mar. 31, 2017
Valuation And Qualifying Accounts [Abstract]
Schedule II - Consolidated Valuation and Qualifying Accounts	SCHEDULE II ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES Consolidated Valuation and Qualifying Accounts for the Fiscal Years Ended March 31, 2017, 2016 and 2015 (in thousands): Allowance for Doubtful Accounts: Year ended March 31, Balance at beginning of period Charged to costs and expenses Charged to other accounts (1) Deductions Balance at end of period 2017 $ 7,956 $ 2,940 $ (13 ) $ (452 ) $ 10,431 2016 5,423 3,542 (81 ) (928 ) 7,956 2015 4,490 1,914 (291 ) (690 ) 5,423 (1) Amounts represent the impact of foreign currency translation.

Background and Summary of Sig34

Background and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation - The consolidated financial statements include the Company, its wholly owned subsidiaries, its majority owned subsidiaries, and variable interest entities (“VIEs”) of which the Company is the primary beneficiary. The Company uses the equity method of accounting for equity investments where it exercises significant influence but does not hold a controlling financial interest. Such investments are recorded in Other assets in the Consolidated Balance Sheets and the related equity in earnings from these investments are included in Equity in net loss of unconsolidated affiliates in the Consolidated Statements of Operations. All intercompany balances and transactions have been eliminated in consolidation.
Estimates	Estimates - The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingencies and liabilities at the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Significant estimates include, but are not limited to, the allowance for doubtful accounts, valuation of inventory, useful lives of property, plant and equipment and amortizing intangible assets, determination of the proper accounting for leases, valuation of equity method investments, goodwill, intangible assets and other long-lived assets for impairment, accounting for stock-based compensation and the ESOP, valuation of the redeemable common stock and redeemable convertible preferred stock, determination of allowances for sales returns, rebates and discounts, determination of the valuation allowance, if any, on deferred tax assets, and reserves for uncertain tax positions. Management’s estimates and assumptions are evaluated on an ongoing basis and are based on historical experience, current conditions and available information. Management believes the accounting estimates are appropriate and reasonably determined; however, due to the inherent uncertainties in making these estimates, actual results could differ from those estimates.
Receivables and Allowance for Doubtful Accounts	Receivables and Allowance for Doubtful Accounts - Receivables include trade receivables, refundable income taxes and other miscellaneous receivables, net of an allowance for doubtful accounts. Receivables at March 31, 2017 and 2016 are as follows: (Amounts in thousands) 2017 2016 Trade receivables $ 160,655 $ 158,664 Refundable income taxes 1,468 19,783 Other miscellaneous receivables 6,820 8,436 Receivables $ 168,943 $ 186,883 Credit is extended to customers based on an evaluation of their financial condition and collateral is generally not required. The evaluation of the customer’s financial condition is performed to reduce the risk of loss. Accounts receivable are evaluated for collectability based on numerous factors, including the length of time individual receivables are past due, past transaction history with customers, their credit worthiness and the economic environment. This estimate is periodically adjusted when management becomes aware of a specific customer’s inability to meet its financial obligations (e.g., bankruptcy filing) or as a result of changes in historical collection patterns.
Inventories	Inventories - Inventories are stated at the lower of cost or market value. The Company’s inventories are maintained on the first-in, first-out (“FIFO”) method. Costs include the cost of acquiring materials, including in-bound freight from vendors and freight incurred for the transportation of raw materials, tooling or finished goods between the Company’s manufacturing plants and its distribution centers, direct and indirect labor, factory overhead and certain corporate overhead costs related to the production of inventory. The portion of fixed manufacturing overhead that relates to capacity in excess of our normal capacity is expensed in the period in which it is incurred and is not included in inventory. Market value of inventory is established based on the lower of cost or estimated net realizable value, with consideration given to deterioration, obsolescence, and other factors. The Company periodically evaluates the carrying value of inventories and adjustments are made whenever necessary to reduce the carrying value to net realizable value.
Property, Plant and Equipment and Depreciation Method	Property, Plant and Equipment and Depreciation Method - Property, plant and equipment are recorded at cost less accumulated depreciation, with the exception of assets acquired through acquisitions, which are initially recorded at fair value. Equipment acquired under capital lease is recorded at the lower of fair market value or the present value of the future minimum lease payments. Depreciation is computed for financial reporting purposes using the straight-line method over the estimated useful lives of the related assets or the lease term, if shorter, as follows: Years Buildings 40 — 45 Machinery and equipment 3 — 18 Leasehold improvements Shorter of useful life or life of lease Costs of additions and major improvements are capitalized, whereas maintenance and repairs that do not improve or extend the life of the asset are charged to expense as incurred. When assets are retired or disposed, the cost and related accumulated depreciation are removed from the asset accounts and any resulting gain or loss is reflected in Loss on disposal of assets and costs from exit and disposal activities in our Consolidated Statements of Operations. Construction in progress is also recorded at cost and includes capitalized interest, capitalized payroll costs and related costs such as taxes and other fringe benefits. Interest capitalized was $0.6 million, $0.4 million, and $0.5 million during the fiscal years ended March 31, 2017, 2016, and 2015, respectively.
Goodwill	Goodwill - The Company records acquisitions resulting in the consolidation of an enterprise using the acquisition method of accounting. Under this method, the Company records the assets acquired, including intangible assets that can be identified, and liabilities assumed based on their estimated fair values at the date of acquisition. The purchase price in excess of the fair value of the identifiable assets acquired and liabilities assumed is recorded as goodwill. Goodwill is reviewed annually for impairment as of March 31 or whenever events or changes in circumstances indicate the carrying value may be greater than fair value. The goodwill impairment analysis is comprised of two steps. The first step requires the comparison of the fair value of the applicable reporting unit to its respective carrying value. If the fair value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, goodwill is not considered impaired and the Company is not required to perform further testing. If the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, then the Company must perform the second step of the impairment test in order to determine the implied fair value of the reporting unit’s goodwill. If the carrying value of a reporting unit’s goodwill exceeds its implied fair value, then the Company would record an impairment loss equal to the difference. With respect to this testing, a reporting unit is a component of the Company for which discrete financial information is available and regularly reviewed by management. Implied fair value of goodwill is determined by considering both the income and market approach. Determining the fair value of a reporting unit is judgmental in nature and involves the use of significant estimates and assumptions. These estimates and assumptions include revenue growth rates and operating margins used to calculate projected future cash flows, risk-adjusted discount rates, future economic and market conditions, and determination of appropriate market comparables. The fair value estimates are based on assumptions management believes to be reasonable, but are inherently uncertain. For the fiscal 2017, ADS completed a quantitative fair value assessment of the International reporting unit and determined no impairment charge was required. GAAP allows entities testing goodwill for impairment the option of performing a qualitative assessment before calculating the fair value of a reporting unit for the goodwill impairment test. If the qualitative assessment is performed, an entity is no longer required to calculate the fair value of a reporting unit unless the entity determines that, based on that assessment, it is more likely than not that its fair value is less than its carrying amount. ADS completed a quantitative fair value measurement of the Domestic reporting unit in March 31, 2016. The test indicated that the fair value of the Domestic reporting unit exceeded the carrying value, indicating that no impairment existed. ADS applied the qualitative assessment to the Domestic reporting unit for the annual impairment test performed as of March 31, 2017. For the current year test, ADS assessed various assumptions, events and circumstances that would have affected the estimated fair value of the reporting unit as compared to its March 31, 2016 quantitative fair value measurement. The results of this assessment indicated that it is not more likely than not that the reporting unit fair value is less than the reporting unit carrying value. The Company did not incur any impairment charges for goodwill in the fiscal years ended March 31, 2017, 2016, and 2015.
Intangible Assets - Definite-Lived	Intangible Assets — Definite-Lived- Definite-lived intangible assets are amortized using the straight-line method over their estimated useful lives, and are tested for recoverability whenever events or changes in circumstances indicate that carrying amounts of the asset group may not be recoverable. Asset groups are established primarily by determining the lowest level of cash flows available. If the estimated undiscounted future cash flows are less than the carrying amounts of such assets, an impairment loss is recognized to the extent the fair value of the asset less any costs of disposition is less than the carrying amount of the asset. Determining the fair value of these assets is judgmental in nature and involves the use of significant estimates and assumptions.
Intangible Assets - Indefinite-Lived	Intangible Assets — Indefinite-Lived- Indefinite-lived intangible assets are tested for impairment annually as of March 31 or whenever events or changes in circumstances indicate the carrying value may be greater than fair value. Determining the fair value of these assets is judgmental in nature and involves the use of significant estimates and assumptions. The Company bases its fair value estimates on assumptions it believes to be reasonable, but that are inherently uncertain. To estimate the fair value of these indefinite-lived intangible assets, the Company uses an income approach, which utilizes a market derived rate of return to discount anticipated performance. An impairment loss is recognized when the estimated fair value of the intangible asset is less than the carrying value. GAAP allows entities testing indefinite-lived intangible assets for impairment the option of performing a qualitative assessment before calculating the fair value of the indefinite-lived intangible assets for the impairment test. If the qualitative assessment is performed, an entity is no longer required to calculate the fair value of an indefinite-lived intangible assets unless the entity determines that, based on that assessment, it is more likely than not that its fair value is less than its carrying amount. ADS completed a quantitative fair value measurement of indefinite-lived trademarks in March 31, 2016. The test indicated that the fair value of the indefinite-lived trademarks substantially exceeded the carrying value, indicating that no impairment existed. ADS applied the qualitative assessment to specific trademarks for the annual impairment test performed as of March 31, 2017. For the current year test, ADS assessed various assumptions, events and circumstances that would have affected the estimated fair value of the reporting unit as compared to its March 31, 2016 quantitative fair value measurement. The results of this assessment indicated that it is not more likely than not that the trademarks fair value is less than the reporting unit carrying value. The Company did not incur any impairment charges for Intangible assets in the fiscal years ended March 31, 2017, 2016, and 2015.
Other Assets	Other Assets - Other assets include investments in unconsolidated affiliates accounted for under the equity method, cash surrender value of officer life insurance on key senior management executives, capitalized software development costs, deposits, Central parts, and other miscellaneous assets. The Company capitalizes development costs for internal use software. Capitalization of software development costs begins in the application development stage and ends when the asset is placed into service. The Company amortizes such costs using the straight-line method over estimated useful lives of 2 to 10 years, which is included in General and administrative expense, Selling expense or Cost of goods sold within the Consolidated Statements of Operations depending on the nature of the asset and its intended use. Central parts represent spare production equipment items which are used to replace worn or broken production equipment parts and help reduce the risk of prolonged equipment outages. The cost of Central parts is amortized on a straight line basis over estimated useful lives of 8 to 30 years. The Company evaluates its investments in unconsolidated affiliates for impairment whenever events or changes in circumstances indicate that the carrying amount might not be recoverable, and recognizes an impairment loss when a decline in value below carrying value is determined to be other-than-temporary. Under these circumstances, the Company would adjust the investment down to its estimated fair value, which then becomes its new carrying value. For the fiscal years ended March 31, 2017 and 2016, the Company recorded an impairment charge of $1.3 million and $4.0 million, respectively, related to its investment in the South American Joint Venture. The impairment charge is included in Equity in net loss of unconsolidated affiliates in the Consolidated Statements of Operations. Other assets as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Investments in unconsolidated affiliates $ 8,986 $ 13,188 Cash surrender value of officer life insurance 12,028 10,739 Capitalized software development costs, net 7,980 7,264 Deposits 1,289 1,319 Central parts 1,856 1,040 Other 14,398 11,706 Total other assets $ 46,537 $ 45,256 The following table sets forth amortization expense related to Other assets in each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Capitalized software development costs $ 3,372 $ 3,872 $ 3,550 Central parts 54 362 55 Other 1,689 1,898 1,977
Leases	Leases - Leases are reviewed for capital or operating classification at their inception. The Company uses the lower of the rate implicit in the lease or its incremental borrowing rate in the assessment of lease classification and assumes the initial lease term includes cancellable and renewal periods that are reasonably assured. For leases classified as capital leases at lease inception, the Company records a capital lease asset and lease financing obligation equal to the lesser of the present value of the minimum lease payments or the fair market value of the leased asset. The capital lease asset is recorded in Property, plant and equipment, net and amortized to its expected residual value at the end of the lease term using the straight-line method, and the lease financing obligation is amortized using the effective interest method over the lease term with the rental payments being allocated to principal and interest. For leases classified as operating leases, the Company records rent expense over the lease term using the straight-line method.
Foreign Currency Translation	Foreign Currency Translation - Assets and liabilities of foreign subsidiaries with a functional currency other than the U.S. dollar are translated into U.S. dollars at the current rate of exchange on the last day of the reporting period. Revenues and expenses are translated at a monthly average exchange rate and equity transactions are translated using either the actual exchange rate on the day of the transaction or a monthly average historical exchange rate. For the fiscal years ended March 31, 2017, 2016, and 2015, the Company’s Accumulated other comprehensive loss (“AOCL”) consisted entirely of foreign currency translation gains and losses.
Net Sales	Net Sales - The Company sells pipe products and related water management products. ADS ships products to customers predominantly by internal fleet and to a lesser extent by third-party carriers. The Company does not provide any additional revenue generating services after product delivery. Sales, net of sales tax and allowances for returns, rebates and discounts are recognized from product sales when persuasive evidence of an arrangement exists, delivery has occurred, the price to the buyer is fixed or determinable and collectability is reasonably assured. ADS recognizes revenue when both persuasive evidence of an arrangement and the price is fixed or determinable. Title to the products and risk of loss generally passes to the customer upon delivery. ADS performs credit check procedures on all new customers, establishes credit limits accordingly, and monitors the creditworthiness of existing customers, which is the basis for concluding that collectability is reasonably assured.
Shipping Costs	Shipping Costs - Shipping costs are incurred to physically move raw materials, tooling and products between manufacturing and distribution facilities and from production or distribution facilities to customers. Shipping costs for the fiscal years ended March 31, 2017, 2016, and 2015 were $120.4 million, $120.5 million, and $121.0 million, respectively, and are included in Cost of goods sold. In certain instances, the Company bills shipping costs to customers. Shipping costs billed to customers were $5.5 million, $7.0 million, and $9.3 million during 2017, 2016 and 2015, respectively, and are included in Net sales.
Stock-Based Compensation	Stock-Based Compensation - See Note 18. Stock-Based Compensation for information about our stock-based compensation award programs and related accounting policies. The Company has several programs for stock-based payments to employees and directors, including stock options and restricted stock. Stock-based compensation expense is recorded in General and administrative expenses, Selling expenses and Cost of goods sold in the Consolidated Statements of Operations. The Company recognized stock-based compensation expense (benefit) in the following line items on the Consolidated Statements of Operations for the fiscal years ended March 31, 2017, 2016, and 2015: (Amounts in thousands) 2017 2016 2015 Component of income before income taxes: Cost of goods sold $ 177 $ (300 ) $ 1,100 Selling expenses 177 (500 ) 1,500 General and administrative expenses 7,953 (5,068 ) 21,647 Total stock-based compensation expense (benefit) $ 8,307 $ (5,868 ) $ 24,247 The following table summarizes stock-based compensation expense (benefit) by award type for the fiscal years ended March 31, 2017, 2016, and 2015: (Amounts in thousands) 2017 2016 2015 Stock-based compensation expense (benefit): Liability-classified Stock Options $ 4,936 $ (6,784 ) $ 21,666 Equity-classified Stock Options 108 — — Restricted Stock 1,945 916 1,681 Non-Employee Director 1,318 — 900 Total stock-based compensation expense (benefit) $ 8,307 $ (5,868 ) $ 24,247 Stock Options Liability-Classified Options – Prior to fiscal 2017, the Company permitted employees to satisfy their personal tax liability associated with the exercise of the stock options through the net settlement of shares in excess of the minimum tax withholding required by law. In addition, prior to the Company’s initial public offering in fiscal 2015, the Company had periodically repurchased shares resulting from option exercises within six months of the exercise date. As such, the Company accounts for all 2000 Plan and 2013 Plan awards issued prior to fiscal 2017 as liability-classified awards. Liability-classified stock option awards are re-measured at fair value at each relevant reporting date, and the pro-rata vested portion of the award is recognized as a liability. The stock-based compensation liability associated with stock options expected to vest within the next twelve months is recorded in Current portion of liability-classified stock-based awards, with the portion related to those expected to vest beyond twelve months recorded in Other liabilities in the Consolidated Balance Sheets. When stock options are exercised, the liability is reclassified to additional paid in capital at fair value. The proceeds from the exercise are also recorded as additional paid in capital. Compensation expense for stock options is recognized on a straight-line basis over the employee’s requisite service period, which is generally the vesting period of the grant. For liability-classified options, the Company estimates the fair value of stock options using a Black-Scholes option-pricing model at the end of each period. The following table summarizes the assumptions used in estimating the fair value of liability-classified stock options: 2017 2016 2015 Common stock price $18.70 - $28.17 $18.34 - $33.03 $14.33 - $29.94 Expected stock price volatility 29.6% - 33.0% 31.1% - 39.3% 28.2% - 51.0% Risk-free interest rate 0.9% - 1.9% 0.5% - 1.5% 0.1% - 1.8% Weighted-average expected option life (years) 0.5 – 5.1 0.5 – 6.2 0.5 - 7.2 Dividend yield 0.9% 0.9% 0.5% 2000 Plan - The Company’s 2000 stock option plan (“2000 Plan”) provides for the issuance of statutory and non-statutory stock options to management based upon the discretion of the Board of Directors. The plan generally provides for grants with the exercise price equal to fair value on the date of grant, which vest in three equal annual amounts beginning in year five and expire after approximately 10 years from issuance. The Company had approximately 1.1 million shares available for grant under the 2000 Plan as of March 31, 2017. The stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year 515 $ 11.82 4.2 Granted — — — Exercised (292 ) 10.63 — Forfeited (28 ) 12.50 — Outstanding at end of year 195 13.31 5.4 Vested at end of year 136 12.26 4.7 Unvested at end of year 59 15.74 7.0 Fair value of options granted during the year $ — All outstanding options are expected to vest. The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 76 $ 6.76 Granted — — Vested — — Forfeitures (17 ) 6.76 Unvested at end of year 59 $ 6.76 As of March 31, 2017, there was a total of $0.3 million of unrecognized compensation expense related to unvested stock option awards under the 2000 plan that will be recognized as an expense as the awards vest over the remaining weighted average service period of 1.3 years. The total fair value of liability-classified options issued under the 2000 Plan that vested during the fiscal year ended March 31, 2015 was $8.1 million. No options vested during the fiscal years ended March 31, 2017 and 2016. The weighted average grant date fair value of stock options granted during the fiscal year ended March 31, 2015 was $6.76. No options were granted during the fiscal years ended March 31, 2017 and 2016. The aggregate intrinsic value for options outstanding and currently exercisable as of March 31, 2017 was $1.7 million and $1.3 million, respectively. The total intrinsic value of options exercised during the fiscal years ended March 31, 2017, 2016, and 2015 were $3.7 million, $3.7 million and $3.4 million, respectively. 2013 Plan - The Company’s 2013 stock option plan (“2013 Plan”) provides for the issuance of non-statutory common stock options to management subject to the Board’s discretion. The plan generally provides for grants with the exercise price equal to fair value on the date of grant. The grants generally vest in five equal annual amounts beginning in year one and expire after approximately 10 years from issuance. Options issued to the Chief Executive Officer vest equally over four years and expire after approximately 10 years from issuance. In May 2014, the Board of Directors approved the increase of shares available for granting under the 2013 plan to 1.4 million shares. The Company had 1.0 million shares available for grant under the 2013 Plan as of March 31, 2017. The liability-classified stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year 1,911 $ 13.64 7.4 Issued — — — Exercised (66 ) 13.64 — Forfeited (99 ) 13.64 — Outstanding at end of year 1,746 13.64 6.0 Vested at end of year 1,125 13.64 6.0 Unvested at end of year 621 13.64 6.0 Fair value of options granted during the year $ — All outstanding options are expected to vest. The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 1,095 $ 6.22 Vested (375 ) — Forfeited (99 ) 6.22 Unvested at end of year 621 $ 6.22 As of March 31, 2017, there was a total of $3.6 million of unrecognized compensation expense related to unvested stock option awards under the 2013 Plan that will be recognized as an expense as the awards vest over the remaining weighted average service period of 1.1 years. The aggregate intrinsic value for options outstanding and currently exercisable as of March 31, 2017 was $14.4 million and $9.3 million, respectively. The total fair value of options that vested during the fiscal years ended March 31, 2017, 2016, and 2015 were $3.4 million, $3.6 million, and $7.2 million, respectively. The total intrinsic value of options exercised during the fiscal year ended March 31, 2017 was $0.8 million. Equity-Classified Options - The Company accounts for awards under the 2013 Plan granted during the fiscal year ended March 31, 2017 as equity-classified awards as employees are no longer permitted to satisfy their personal tax liability in excess of the minimum statutory withholding. Equity-classified stock option awards are measured based on the grant-date estimated fair value of each award. Compensation expense for stock options is recognized on a straight-line basis over the employee’s requisite service period, which is generally the vesting period of the grant. The Company determines the fair value of the options based on the Black-Scholes option pricing model at the grant date. This methodology requires significant inputs including the price of the Company’s common stock, risk-free interest rate, dividend yield and expiration date. The following table summarizes the assumptions used in estimating the fair value of the equity-classified stock options: 2017 Common stock price $24.20 Expected stock price volatility 31.5% - 35.6% Risk-free interest rate 2.0% - 2.2% Weighted-average expected option life (years) 4.9 – 6.1 Dividend yield 1.0% The equity-classified stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year — — Granted 514 $ 24.20 — Exercised — — — Forfeited — — — Outstanding at end of year 514 24.20 9.0 Vested at end of year 15 24.20 9.0 Unvested at end of year 499 24.20 9.0 Fair value of options granted during the year $ 7.81 All outstanding options are expected to vest except options granted to an executive with a planned retirement. The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year — — Granted 514 $ 7.81 Vested (15 ) 6.72 Forfeited — — Unvested at end of year 499 $ 7.84 As of March 31, 2017, there was a total of $2.6 million of unrecognized compensation expense related to unvested equity-classified stock option awards that will be recognized as an expense as the awards vest over the remaining weighted average service period of 2.9 years. The weighted average grant fair value of stock options granted during the fiscal years ended March 31, 2017, 2016, and 2015 were $7.81, $0.00, and $0.00, respectively. The total fair value of options that vested during the fiscal years ended March 31, 2017, 2016, and 2015 were $0.1 million, less than $0.1 million, and less than $0.1 million, respectively. There were no options exercised during the fiscal years ended March 31, 2017, 2016, and 2015. Restricted Stock On September 16, 2008, the Board of Directors adopted the restricted stock plan, which provides for the issuance of restricted stock awards to certain key employees. The restricted stock generally vest ratably over a five-year period from the original restricted stock grant date, contingent on the employee’s continuous employment by ADS. In certain instances, however, a portion of the grants vested immediately or for accounting purposes were deemed to have vested immediately, including the grants to the Chief Executive Officer, which do not have a substantial risk of forfeiture as a result of different vesting provisions. Under the restricted stock plan, vested shares are considered issued and outstanding. Employees with restricted stock have the right to dividends on the shares awarded (vested and unvested) in addition to voting rights on non-forfeited shares. Prior to the Company’s initial public offering in fiscal 2015, the Company periodically repurchased shares from employees within six months of the shares vesting. As such, for the periods prior to the Company’s initial public offering, the restricted stock awards were accounted for as liability-classified awards. In the periods subsequent to the initial public offering, the Company discontinued repurchasing employee held restricted shares due to the existence of a public market for the shares. Accordingly, upon the initial public offering the Company has modified the restricted stock awards from being accounted for as liability-classified to equity-classified awards and reclassified the carrying amount of the awards of $4.8 million to Paid-in capital in the Consolidated Balance Sheets. The restricted stock has been accounted for as equity-classified awards for the periods subsequent to the initial public offering. The fair value of restricted stock is based on the fair value of the Company’s common stock. Compensation expense is recognized on a straight-line basis over the employee’s requisite service period, which is generally the vesting period of the grant. The Company had approximately 0.2 million shares available for grant under this plan as of March 31, 2017. The information about the unvested restricted stock grants as of March 31, 2017 is as follows: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 112 $ 12.65 Granted 191 24.20 Vested (49 ) 16.15 Forfeited — Unvested at end of year 254 $ 21.92 The Company expects all restricted stock grants to vest. At March 31, 2017, there was approximately $3.5 million of unrecognized compensation expense related to the restricted stock that will be recognized over the weighted average remaining service period of 2.4 years. During the fiscal year ended March 31, 2017, the weighted average grant date fair value of restricted stock granted was $24.20. No restricted stock was granted during the fiscal years ended March 31, 2016 and 2015. During the fiscal years ended March 31, 2017, 2016, and 2015 the total fair value of restricted stock that vested was $1.2 million, $1.1 million and $1.9 million, respectively. Non-Employee Director Compensation Plan On June 18, 2014, the Company amended its then-existing Stockholders’ Agreement to authorize 0.3 million shares of restricted stock to be granted to non-employee members of its Board of Directors. The shares typically will vest one year from the date of issuance. Under this stock plan, the vested shares granted are considered issued and outstanding. Non-employee directors with this stock have the right to dividends on the shares awarded (vested and unvested) in addition to voting rights. The Company has determined that the restricted stock granted to directors should be accounted for as equity-classified awards. The Company had approximately 0.2 million and 0.2 million shares available for grant under this plan as of March 31, 2017 and 2016. The following table summarizes information about the unvested Non-Employee Director Compensation stock grants as of March 31, 2017 : 2017 (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year — — Granted 77 $ 24.20 Vested (37 ) 24.20 Unvested at end of year 40 $ 24.20 As of March 31, 2017, there was approximately $0.5 million of unrecognized compensation expense related to this restricted stock that will be recognized over the weighted average remaining service period of 0.6 years.
Advertising	Advertising - The Company expenses advertising costs as incurred. Advertising costs are recorded in Selling expenses in the Consolidated Statements of Operations. The total advertising costs were $3.1 million, $3.2 million, and $2.5 million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively.
Self-Insurance	Self-Insurance - The Company is self-insured for short term disability and medical coverage it provides for substantially all eligible employees. The Company is self-insured for medical claims up to the individual and aggregate stop-loss coverage limits. The Company accrues for claims incurred but not reported based on an estimate of future claims related to events that occurred prior to the fiscal year end if it has not met the aggregate stop-loss coverage limit. Amounts expensed totaled $39.5 million, $37.5 million, and $32.0 million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively, of which employees contributed $5.1 million, $4.5 million, and $4.1 million, respectively. ADS is also self-insured for various other general insurance programs to the extent of the applicable deductible limits on the Company’s insurance coverage. These programs include primarily automobile, general liability and employment practices coverage with deductibles ranging from $0.3 million to $0.5 million per occurrence or claim incurred. Amounts expensed during the period, including an estimate for claims incurred but not reported at year end, were $1.8 million, $2.1 million, and $0.6 million, for the years ended March 31, 2017, 2016, and 2015, respectively. ADS is also self-insured for workers’ compensation insurance with stop-loss coverage for claims that exceed $0.3 million per incident up to the respective state statutory limits. Amounts expensed, including an estimate for claims incurred but not reported, were $2.1 million, $3.9 million, and $1.4 million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively.
Income Taxes	Income Taxes - Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized and represent the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. They are measured using the enacted tax rates expected to apply to taxable income in the years in which the related temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The deferred income tax provision represents the change during the reporting period in the deferred tax assets and deferred tax liabilities. Penalties and interest recorded on income taxes payable are recorded as part of Income tax expense. The Company determines whether an uncertain tax position is more likely than not to be sustained upon examination, including resolution of any related appeals or litigation process, based upon the technical merits of the position. For tax positions meeting the more likely than not threshold, the tax amount recognized in the financial statements is the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant taxing authority.
Fair Values	Fair Values - The fair value framework requires the categorization of assets and liabilities into three levels based upon assumptions (inputs) used to price the assets or liabilities. Level 1 provides the most reliable measure of fair value, whereas Level 3 generally requires significant management judgment. The three levels are defined as follows: Level 1 — Unadjusted quoted prices in active markets for identical assets and liabilities. Level 2 — Observable inputs other than those included in Level 1. For example, quoted prices for similar assets or liabilities in active markets or quoted prices for identical assets or liabilities in inactive markets. Level 3 — Unobservable inputs reflecting management’s own assumptions about the inputs used in pricing the asset or liability. ADS’s policy for determining when transfers between levels have occurred is to use the actual date of the event or change in circumstances that caused the transfer.
Concentrations of Risk	Concentrations of Risk - The Company has a large, active customer base of approximately twenty thousand customers with two customers, Ferguson Enterprises and HD Supply Waterworks, each representing more than 10% of annual net sales. Such customers accounted for 23.5%, 21.1%, and 20.3% of fiscal year 2017, 2016 and 2015 net sales, respectively. The Company’s customer base is diversified across the range of end markets that it serves. Financial instruments that potentially subject the Company to a concentration of credit risk consist principally of Receivables. The Company provides its products to customers based on an evaluation of the customers’ financial condition, generally without requiring collateral. Exposure to losses on Receivables is principally dependent on each customer’s financial condition. The Company performs ongoing credit evaluations of its customers. The Company monitors the exposure for credit losses and maintains allowances for anticipated losses. Concentrations of credit risk with respect to Receivables are limited due to the large number of customers comprising the Company’s customer base and their dispersion across many different geographies. One customer, Ferguson Enterprises, accounted for approximately 15.7% and 14.0% of Receivables at March 31, 2017 and 2016, respectively.
Derivatives	Derivatives - The Company recognizes derivative instruments as either assets or liabilities and measure those instruments at fair value. ADS uses interest rate swaps, commodity options in the form of collars and swaps, and foreign currency forward contracts to manage various exposures to interest rate, commodity price, and exchange rate fluctuations. These instruments do not qualify for hedge accounting treatment and therefore, gains and losses from contract settlements and changes in fair value of the derivative instruments are recognized in Derivative losses (gains) and other expense (income), net in the Consolidated Statements of Operations. The Company’s policy is to present all derivative balances on a gross basis. The Company also has forward purchase agreements in place with certain resin suppliers for virgin polyethylene resin. The agreements specify a fixed amount of virgin resin material to be purchased at a fixed price for a given period of time in quantities the Company will use in the normal course of business, and therefore, are not subject to the guidance provided in Accounting Standards Codification ASC”) 810-15 Consolidation
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements Consolidation — In February 2015, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update to make changes to consolidation guidance to address concerns of stakeholders that current accounting for certain legal entities might require a reporting entity to consolidate another legal entity in situations in which the reporting entity’s contractual rights do not give it the ability to act primarily on its own behalf, the reporting entity does not hold a majority of the legal entity’s voting rights, or the reporting entity is not exposed to a majority of the legal entity’s economic benefits or obligations. This update is effective for annual periods beginning on or after December 15, 2015, and interim periods within those years, with early adoption permitted. The Company adopted this standard effective April 1, 2016. The update has had no effect on the consolidated financial statements. Debt Issuance Costs — In April 2015, the FASB issued an accounting standards update that requires debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability instead of being presented as an asset. Debt disclosures will include the face amount of the debt liability and the effective interest rate. The update requires retrospective application and represents a change in accounting principle. In August 2015, the FASB issued an additional accounting standards update that provided supplemental guidance that the SEC would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. These updates are effective for annual periods beginning after December 15, 2015, and interim periods within those years. Early adoption is permitted for financial statements that have not been previously issued. The Company adopted this standard effective April 1, 2016 on a retrospective basis. See Note 12. Debt for additional information about the impact of the adoption of the updates. Deferred Tax Assets and Liabilities — In November 2015, the FASB issued an accounting standards update which requires entities to classify all deferred tax assets and liabilities, as well as any related valuation allowance, as non-current, rather than separately record the current and non-current portions. This update is effective for annual periods beginning on or after December 15, 2016, and interim periods within those years, with early adoption permitted. The amendments in this update may be applied either prospectively to all deferred tax liabilities and assets or retrospectively to all periods presented. The Company adopted this standard on April 1, 2016 on a prospective basis and prior periods have not been adjusted. The impact of the adoption of this standard was a reduction to the net current deferred tax assets balance included in Deferred income taxes and other current assets on the Consolidated Balance Sheets from $11.7 million as of March 31, 2016 to zero as of March 31, 2017, with all deferred tax assets and liabilities as of March 31, 2017 now being classified as non-current. The update had no effect on the Company’s Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income (Loss), Consolidated Statements of Cash Flows and Consolidated Statements of Stockholders’ Equity and Mezzanine Equity. Internal-Use Software – In April 2017 the FASB issued an accounting standards update to provide guidance to customers concerning whether a cloud computing arrangement includes a software license. Under this new standard, 1) if a cloud computing arrangement includes a software license, the software license element of the arrangement should be accounted for in a manner consistent with the acquisition of other software licenses, or 2) if the arrangement does not include a software license, the arrangement should be accounted for as a service contract. The standard will take effect for public companies for annual reporting periods beginning after December 15, 2015, including interim reporting periods. The Company adopted the new standard on April 1, 2016 on a prospective basis. The update did not have a material impact on the consolidated financial statements. Recent Accounting Pronouncements Not Yet Adopted Revenue Recognition — In May 2014, the FASB issued an accounting standards update which amends the guidance for revenue recognition. This amendment contains principles that will require an entity to recognize revenue to depict the transfer of goods and services to customers at an amount that an entity expects to be entitled to in exchange for goods or services. The amendment sets forth a new revenue recognition model that requires identifying the contract, identifying the performance obligations and recognizing the revenue upon satisfaction of performance obligations. In August 2015, the FASB issued an additional accounting standards update that deferred the effective date of the new revenue standard for public entities to periods beginning after December 15, 2017, with early adoption permitted but not earlier than the original effective date of periods beginning after December 15, 2016. There have also been various additional accounting standards updates issued by the FASB in 2016 that further amend this new revenue standard. The updated standard permits the use of either the retrospective or cumulative effect transition method. The Company expects to adopt this standard effective April 1, 2018. The Company has not yet selected a transition method and is currently evaluating the impact of this amendment on the consolidated financial statements. Measurement of Inventory — In July 2015, the FASB issued an accounting standards update which requires entities to measure most inventory at the lower of cost and net realizable value, simplifying current guidance under which an entity must measure inventory at the lower of cost or market. The determination of market value, under current guidance, is considered unnecessarily complex as there are several potential outcomes based on its definition as replacement cost, net realizable value, or net realizable value less an approximate normal profit margin. Whereas net realizable value, under the update, is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This update is effective for annual periods beginning on or after December 15, 2016, and interim periods within those years, with early adoption permitted. The Company expects to adopt this standard effective April 1, 2017. The Company does not expect the adoption of this new standard to have a material impact on the consolidated financial statements. Leases — In February 2016, the FASB issued an accounting standards update which amends the guidance for leases. This amendment contains principles that will require an entity to recognize most leases on the balance sheet by recording a right-of-use asset and a lease liability, unless the lease is a short-term lease that has an accounting lease term of twelve months or less. The amendment also contains other changes to the current lease guidance that may result in changes to how entities determine which contractual arrangements qualify as a lease, the accounting for executory costs such as property taxes and insurance, as well as which lease origination costs will be capitalizable. The new standard also requires expanded quantitative and qualitative disclosures. This update is effective for fiscal years beginning after December 15, 2018, including interim periods within those years, and early adoption is permitted. The updated standard requires the use of the modified retrospective transition method, whereby the new guidance will be applied at the beginning of the earliest period presented in the financial statements of the period of adoption. The modified retrospective transition approach includes certain practical expedients that entities may elect to apply in transition. The Company expects to adopt this standard effective April 1, 2019. The Company has not yet determined whether to apply any of the available practical expedients. The Company has begun the process of reviewing contracts under the new standard to determine the impact the new standard will have on the consolidated financial statements. The Company is also in process of implementing a new software solution to improve the process of accounting for leases under the current and new standard. Stock-Based Compensation — In March 2016, the FASB issued an accounting standards update which is intended to simplify certain aspects of the accounting for stock-based compensation. The Company will adopt the standard on April 1, 2017. This update contains changes to the accounting for excess tax benefits, whereby excess tax benefits will be recognized in the income statement rather than in additional paid-in capital on the balance sheet. This standard is expected to result in increased volatility to the income tax expense in future periods dependent upon the timing of employee exercises of stock options, the price of the Company's common stock and the vesting of restricted stock awards. Excess tax benefits will now be classified as operating cash flows rather than financing cash flows. The amendment also contains potential changes to the accounting for forfeitures, whereby entities can elect to either continue to apply the current GAAP requirement to estimate forfeitures when determining compensation expense, or to alternatively reverse the compensation expense of forfeited awards when they occur. The Company will account for forfeitures as they occur, which may result in expense volatility based on the timing of forfeitures. In addition, the amendment also modifies the net-share settlement liability classification exception for statutory income tax withholdings, whereby the new guidance allows an employer with a statutory income tax withholding obligation to withhold shares with a fair value up to the maximum statutory tax rate in the employee’s applicable jurisdiction. The Company included this provision in awards issued in fiscal 2017 and modified previously issued awards on April 1, 2017. See the note regarding Subsequent Events for further information on the modification. Measurement of Credit Losses — In June 2016, the FASB issued an accounting standards update which provides amended guidance on the measurement of credit losses on financial instruments, including trade receivables. This accounting standards update requires the use of an impairment model referred to as the current expected credit loss model. This update is effective for fiscal years beginning after December 15, 2019, including interim periods within those years, and early adoption is permitted for fiscal years beginning after December 15, 2018. The Company expects to adopt this standard effective April 1, 2020. The Company is currently evaluating the impact of this standard on the consolidated financial statements. Cash Flow Classification — In August 2016, the FASB issued an accounting standards update which provides amended guidance on the classification of certain cash receipts and cash payments in the statement of cash flows, including related to debt prepayment or debt extinguishment costs, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance and distributions received from equity method investees. This update is effective for fiscal years beginning after December 15, 2017, including interim periods within those years, and early adoption is permitted. This amended guidance must be applied retrospectively to all periods presented, but may be applied prospectively if retrospective application would be impracticable. The Company expects to adopt this standard effective April 1, 2018. The Company is currently evaluating the impact of this standard on the consolidated financial statements. Definition of a Business – In January 2017, the FASB issued an accounting standards update to clarify the definition of a business. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The amendments are intended to help companies and other organizations evaluate whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments provide a more robust framework to use in determining when a set of assets and activities is a business. The amendments are effective for annual periods beginning after December 15, 2017, including interim periods within those periods. The Company expects to adopt this standard effective April 1, 2018. The Company is currently evaluating the impact of this standard on the consolidated financial statements. Goodwill Impairment – In January 2017, the FASB issued an accounting standards update which removes the requirement to compare the implied fair value of goodwill with its carrying amount as part of step 2 of the goodwill impairment test. As a result, under the standards update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The amendments are effect for annual periods beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company expects to adopt this standard effective April 1, 2020. The Company is currently evaluating the impact of this standard on the consolidated financial statements. With the exception of pronouncements described above, there have been no new accounting pronouncements that have significance, or potential significance, to our consolidated financial statements.

Background and Summary of Sig35

Background and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Summary of Receivables	Receivables and Allowance for Doubtful Accounts - Receivables include trade receivables, refundable income taxes and other miscellaneous receivables, net of an allowance for doubtful accounts. Receivables at March 31, 2017 and 2016 are as follows: (Amounts in thousands) 2017 2016 Trade receivables $ 160,655 $ 158,664 Refundable income taxes 1,468 19,783 Other miscellaneous receivables 6,820 8,436 Receivables $ 168,943 $ 186,883
Estimated Useful Lives of Related Assets	Depreciation is computed for financial reporting purposes using the straight-line method over the estimated useful lives of the related assets or the lease term, if shorter, as follows: Years Buildings 40 — 45 Machinery and equipment 3 — 18 Leasehold improvements Shorter of useful life or life of lease
Other Assets	Other assets as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Investments in unconsolidated affiliates $ 8,986 $ 13,188 Cash surrender value of officer life insurance 12,028 10,739 Capitalized software development costs, net 7,980 7,264 Deposits 1,289 1,319 Central parts 1,856 1,040 Other 14,398 11,706 Total other assets $ 46,537 $ 45,256
Amortization Expense Related to Other Assets	The following table sets forth amortization expense related to Other assets in each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Capitalized software development costs $ 3,372 $ 3,872 $ 3,550 Central parts 54 362 55 Other 1,689 1,898 1,977

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Mar. 31, 2017
BaySaver [Member]
Summary of Purchase Price Allocation	The purchase price allocation is as follows: (Amounts in thousands) Cash $ 12 Other current assets 2,262 Property, plant and equipment 164 Goodwill 2,495 Intangible assets 10,800 Other assets 152 Current liabilities (1,385 ) Total purchase price $ 14,500
Effect of Acquisitions for Unaudited Pro Forma Consolidated Statements of Operations	The unaudited pro forma consolidated results are not projections of future results of operations of the combined company nor do they reflect the expected realization of any cost savings or synergies associated with the acquisition. Proforma (Amounts in thousands) 2016 2015 Net sales $ 1,294,277 $ 1,190,749 Net income (loss) attributable to ADS 25,090 (7,799 )
Schedule of Business Acquisitions by Acquisition, Contingent Consideration	The purchase price was determined as follows: (Amounts in thousands) Acquisition-date fair value of prior equity interest $ 4,220 Acquisition-date fair value of noncontrolling interest 6,330 Cash paid at acquisition date 3,200 Fair value of contingent consideration 750 Total purchase price $ 14,500
Plastic Tubing Industries [Member]
Summary of Purchase Price Allocation	The purchase price allocation is as follows: (Amounts in thousands) Intangible assets $ 160 Inventory 2,050 Property, plant and equipment 7,899 Fair value of net assets acquired 10,109 Purchase price 9,500 Gain on bargain purchase $ 609
Effect of Acquisitions for Unaudited Pro Forma Consolidated Statements of Operations	This unaudited pro forma information is presented for illustrative purposes only and is not indicative of what actual results would have been if the acquisition had taken place on April 1, 2015 or of future results. In addition, the unaudited pro forma consolidated results are not projections of future results of operations of the combined company nor do they reflect the expected realization of any cost savings or synergies associated with the acquisition. Proforma (Amounts in thousands) 2017 2016 Net sales $ 1,266,602 $ 1,302,120 Net income attributable to ADS 33,634 25,100
Ideal Pipe [Member]
Summary of Purchase Price Allocation	The purchase price allocation is as follows: (Amounts in thousands) Cash $ 7,443 Other current assets 9,036 Property, plant and equipment 27,258 Goodwill and intangible assets 18,890 Current liabilities (12,721 ) Non-current liabilities (6,078 ) Total purchase price $ 43,828
Effect of Acquisitions for Unaudited Pro Forma Consolidated Statements of Operations	This unaudited pro forma information is presented for illustrative purposes only and is not indicative of what actual results would have been if the acquisition had taken place on April 1, 2013 or of future results. In addition, the unaudited pro forma consolidated results are not projections of future results of operations of the combined company nor do they reflect the expected realization of any cost savings or synergies associated with the acquisition. Proforma (Amounts in thousands) 2015 Net sales $ 1,217,431 Net (loss) income attributable to ADS (6,118 )

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Mar. 31, 2017
Property Plant And Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment, net as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Land, buildings and improvements $ 189,163 $ 178,189 Machinery and equipment 771,878 730,791 Construction in progress 14,022 14,902 Total cost 975,063 923,882 Less accumulated depreciation (568,205 ) (532,138 ) Property, plant and equipment, net $ 406,858 $ 391,744
Depreciation Expense Related to Property, Plant and Equipment	The following table sets forth depreciation expense related to Property, plant and equipment in each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Depreciation expense (inclusive of leased assets depreciation) $ 58,692 $ 55,650 $ 50,136

Leases (Tables)

Leases (Tables)	12 Months Ended
	Mar. 31, 2017
Leases [Abstract]
Summary of Leased Assets Included in Property, Plant and Equipment	Leased assets included in Property, plant and equipment consisted of the following: (Amounts in thousands) 2017 2016 Buildings and improvements $ 6,044 $ 6,131 Machinery and equipment 199,813 186,258 Total cost 205,857 192,389 Less accumulated depreciation (108,144 ) (102,572 ) Leased assets in Property, plant and equipment, net $ 97,713 $ 89,817
Schedule of Interest and Depreciation Expense Related to Capital Leases	The following sets forth the interest and depreciation expense related to capital leases recorded in each fiscal year ended March 31: (Amounts in thousands) 2017 2016 2015 Lease interest expense $ 3,864 $ 3,367 $ 2,249 Depreciation of leased assets 17,415 15,782 13,943
Schedule of Future Minimum Lease Payments under Capital Leases and Present Value	The following is a schedule by year of future minimum lease payments under capital leases and the present value of the net minimum lease payments as of March 31, 2017: (Amounts in thousands) 2018 $ 24,329 2019 19,784 2020 15,681 2021 12,521 2022 9,271 Thereafter 6,072 Total minimum lease payments (a) $ 87,658 Less: amount representing interest (b) 7,498 Present value of net minimum lease payments $ 80,160 Current maturities of capital lease obligations 21,450 Long-term capital lease obligations 58,710 Total lease obligation $ 80,160 (a) Excludes contingent rentals which may be paid. Contingent rentals amounted to $0.6 million, $0.1 million and $0.8 million for the years ended March 31, 2017, 2016 and 2015, respectively. (b) Amount necessary to reduce minimum lease payments to present value calculated at the lower of the rate implicit in the lease or the Company’s incremental borrowing rate at lease inception.
Summary of Future Minimum Rental Commitments under Operating Leases	Future minimum rental commitments under non-cancellable operating leases as of March 31, 2017, are summarized below (amounts in thousands): 2018 2019 2020 2021 2022 Thereafter Future operating lease payments $ 3,004 $ 2,531 $ 1,921 $ 1,381 $ 755 $ 3,100

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Mar. 31, 2017
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Raw materials $ 52,746 $ 46,604 Finished goods 205,684 183,862 Total Inventories $ 258,430 $ 230,466

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Mar. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Carrying Amount of Goodwill by Reportable Segment	Goodwill - The carrying amount of goodwill by reportable segment is as follows: (Amounts in thousands) Domestic International Total Balance at April 1, 2015 $ 87,507 $ 11,172 $ 98,679 Acquisition 2,495 — 2,495 Currency translation — (289 ) (289 ) Balance at March 31, 2016 $ 90,002 $ 10,883 $ 100,885 Currency translation — (319 ) (319 ) Balance at March 31, 2017 $ 90,002 $ 10,564 $ 100,566
Summary of Intangible Assets	Intangible Assets - Intangible assets as of March 31, 2017 and 2016 consisted of the following: 2017 2016 (Amounts in thousands) Gross Intangible Accumulated Amortization Net Intangible Gross Intangible Accumulated Amortization Net Intangible Definite-lived intangible assets Developed technology $ 27,580 $ (14,888 ) $ 12,692 $ 44,579 $ (29,371 ) $ 15,208 Customer relationships 40,767 (26,768 ) 13,999 40,732 (22,646 ) 18,086 Patents 7,512 (4,768 ) 2,744 7,048 (4,167 ) 2,881 Non-compete and other contractual agreements 1,242 (1,102 ) 140 1,242 (842 ) 400 Trademarks and tradenames 15,741 (5,465 ) 10,276 15,563 (4,195 ) 11,368 Total definite-lived intangible assets 92,842 (52,991 ) 39,851 109,164 (61,221 ) 47,943 Indefinite-lived intangible assets Trademarks 11,907 — 11,907 11,926 — 11,926 Total Intangible assets $ 104,749 $ (52,991 ) $ 51,758 $ 121,090 $ (61,221 ) $ 59,869
Weighted Average Amortization Period for Definite-Lived Intangible assets	The following table presents the weighted average amortization period for definite-lived intangible assets at March 31, 2017: Weighted Average Amortization Period (in years) Developed technology 11.0 Customer relationships 8.5 Patents 8.3 Non-compete and other contractual agreements 5.1 Trademarks and tradenames 13.5
Future Intangible Asset Amortization Expense	The following table presents the future intangible asset amortization expense based on existing intangible assets at March 31, 2017: Fiscal Year (Amounts in thousands) 2018 2019 2020 2021 2022 Thereafter Total Amortization expense $ 7,847 $ 7,692 $ 6,006 $ 5,865 $ 4,224 $ 8,217 $ 39,851

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Carried at Fair Value	The assets, liabilities and mezzanine equity carried at fair value as of the fiscal years ended March 31 were as follows: March 31, 2017 (Amounts in thousands) Total Level 1 Level 2 Level 3 Assets: Derivative assets — diesel fuel contracts $ 179 $ — $ 179 $ — Total assets at fair value on a recurring basis $ 179 $ — $ 179 $ — Liabilities: Derivative liability - diesel fuel contracts $ 142 $ — $ 142 $ — Contingent consideration for acquisitions 1,348 — — 1,348 Total liabilities at fair value on a recurring basis $ 1,490 $ — $ 142 $ 1,348 March 31, 2016 (Amounts in thousands) Total Level 1 Level 2 Level 3 Assets: Derivative assets — currency forward contracts $ 11 $ — $ 11 $ — Total assets at fair value on a recurring basis $ 11 $ — $ 11 $ — Liabilities: Derivative liability — interest rate swaps $ 252 $ — $ 252 $ — Derivative liability — diesel fuel contracts 2,615 — 2,615 — Derivative liability — propylene swaps 8,027 — 8,027 — Contingent consideration for acquisitions 2,858 — — 2,858 Total liabilities at fair value on a recurring basis $ 13,752 $ — $ 10,894 $ 2,858
Summary of Quantitative Information about Level 3 Fair Value Measurements	Quantitative Information about Level 3 Fair Value Measurements (Amounts in thousands) Liabilities & Mezzanine Equity Fair Value at 3/31/17 Valuation Technique(s) Unobservable Input Quantifiable Input Contingent consideration for acquisitions $ 1,348 Discounted cash flow Weighted Average Cost of Capital (“WACC”) (a) 9.50% Liabilities & Mezzanine Equity Fair Value at 3/31/16 Valuation Technique(s) Unobservable Input Quantifiable Input Contingent consideration for acquisitions $ 2,858 Discounted cash flow Weighted Average Cost of Capital (“WACC”) (a) 9.75%-10% (a) Represents discount rates or rates of return estimates and assumptions that the Company believes would be used by market participants when valuing these liabilities.
Summary of Changes in Fair Value of Recurring Fair Value Measurements Using Unobservable Inputs	Changes in the fair value of recurring fair value measurements using significant unobservable inputs (Level 3) for the fiscal years ended March 31, 2017 and 2016 were as follows: Contingent consideration Balance at March 31, 2015 $ 2,444 Acquisition 750 Change in fair value 371 Payments of contingent consideration liability (707 ) Balance at March 31, 2016 $ 2,858 Change in fair value (266 ) Payments of contingent consideration liability (1,244 ) Balance at March 31, 2017 $ 1,348

Investment in Affiliates (Table

Investment in Affiliates (Tables)	12 Months Ended
	Mar. 31, 2017
BaySaver [Member]
Assets and Liabilities of Joint Ventures	The table below includes the assets and liabilities of BaySaver that are consolidated as of March 31, 2017 and 2016. The balances exclude intercompany transactions that are eliminated upon consolidation. (Amounts in thousands) 2017 2016 Assets Current assets $ 2,572 $ 3,121 Property, plant and equipment, net 111 140 Other noncurrent assets 11,568 12,668 Total assets $ 14,251 $ 15,929 Liabilities Current liabilities $ 1,344 $ 1,696 Total liabilities $ 1,344 $ 1,696
Tigre-ADS USA [Member]
Summarized Financial Data of Joint Ventures	Summarized financial data as of the fiscal years ended March 31 for the Tigre-ADS USA joint venture is as follows: (Amounts in thousands) 2017 2016 Investment in Tigre-ADS USA $ 2,427 $ 2,932 Receivable from Tigre-ADS USA 9 45
ADS Mexicana [Member]
Assets and Liabilities of Joint Ventures	The table below includes the assets and liabilities of ADS Mexicana that are consolidated as of March 31, 2017 and 2016. The balances exclude intercompany transactions that are eliminated upon consolidation. (Amounts in thousands) 2017 2016 Assets Current assets $ 24,952 $ 27,650 Property, plant and equipment, net 19,262 17,461 Other noncurrent assets 2,269 1,742 Total assets $ 46,483 $ 46,853 Liabilities Current liabilities $ 11,042 $ 10,769 Noncurrent liabilities 2,961 5,390 Total liabilities $ 14,003 $ 16,159
South American Joint Venture [Member]
Summarized Financial Data of Joint Ventures	Summarized financial data as of the fiscal years ended March 31 for the South American Joint Venture is as follows: (Amounts in thousands) 2017 2016 Investment in South American Joint Venture $ 6,559 $ 10,256 Net Receivable from South American Joint Venture 3,639 3,201

Debt (Tables)

Debt (Tables)	12 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Long-Term Debt	Long-term debt as of the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 Secured Bank Term Loans Revolving Credit Facility — ADS $ 194,300 $ 166,000 Revolving Credit Facility — ADS Mexicana 1,500 — Term Note 72,500 82,500 Senior Notes payable 75,000 100,000 Industrial revenue bonds 1,845 2,715 Equipment financing 4,216 — ADS Mexicana Scotia Bank revolving credit facility 1,000 — Total 350,361 351,215 Unamortized debt issuance costs (1,723 ) (3,131 ) Current maturities (37,789 ) (35,870 ) Long-term debt obligations $ 310,849 $ 312,214
Maturities of Long-term Debt (Excluding Interest and Deferred Financing Costs)	Maturities of long-term debt (excluding interest and deferred financing costs) as of March 31, 2017 are summarized below: Fiscal Years Ending March 31, (Amounts in thousands) 2018 2019 2020 2021 2022 Thereafter Total Principal maturities $ 37,789 $ 285,145 $ 25,935 $ 960 $ 532 $ — $ 350,361

Derivative Transactions (Tables

Derivative Transactions (Tables)	12 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Summary of Fair Values for Various Derivatives	A summary of the fair values for the various derivatives at March 31, 2017 and 2016 is presented below: 2017 Assets Liabilities (Amounts in thousands) Receivables Other assets Other accrued liabilities Other liabilities Diesel fuel option collars and swaps $ 149 $ 30 $ (122 ) $ (20 ) 2016 Assets Liabilities (Amounts in thousands) Receivables Other assets Other accrued liabilities Other liabilities Interest rate swaps $ — $ — $ (252 ) $ — Diesel fuel option collars and swaps — 11 (2,609 ) (6 ) Propylene swaps — — (8,027 ) —
Schedule of Cash Settlements and Net Losses and Net (Gains) on Mark-to-Market Adjustments for Changes in Fair Value of Derivative Contracts	The Company recorded net losses and net (gains) on mark-to-market adjustments for changes in the fair value of derivative contracts as well as net losses and net (gains) on the settlement of derivative contracts as follows: Net Unrealized Mark to Market Losses (Gains) (Amounts in thousands) 2017 2016 2015 Interest rate swaps $ (252 ) $ (513 ) $ (236 ) Foreign exchange forward contracts — 28 (28 ) Diesel fuel option collars (2,642 ) (237 ) 2,841 Propylene swaps (8,027 ) 2,885 5,169 Total net unrealized mark to market losses (gains) $ (10,921 ) $ 2,163 $ 7,746 Net Realized Losses (Gains) (Amounts in thousands) 2017 2016 2015 Foreign exchange forward contracts $ — $ (150 ) $ 5,636 Diesel fuel option collars 1,893 3,142 736 Propylene swaps 6,671 11,742 1,333 Total net realized losses (gains) $ 8,564 $ 14,734 $ 7,705 Total realized and unrealized losses (gains) included in Derivative losses (gains) and other expense (income), net (1) $ (2,357 ) $ 16,897 $ 15,451 (1) The total balance in Derivative losses (gains) and other expense (income), net in the Consolidated Statements of Operations also includes other income items of ($3.6) million, ($0.3) million, and ($1.1) million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively.

Mezzanine Equity (Tables)

Mezzanine Equity (Tables)	12 Months Ended
	Mar. 31, 2017
Text Block [Abstract]
Schedule of Redeemable Preferred Stock	(Amounts in thousands) 2017 2016 Quarterly cash dividends $ 1,494 $ 1,272 Annual cash dividends 18 21 Total cash dividends $ 1,512 $ 1,293 Annual stock dividend 134 132 Annual cash dividend 18 21 Total ESOP required dividends $ 152 $ 153 Allocated shares 7,779 7,831 Required dividend per share 0.0195 0.0195 Required dividends $ 152 $ 153

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Mar. 31, 2017
Summary of Stock-based Compensation Expense (Benefit)	The Company recognized stock-based compensation expense (benefit) in the following line items on the Consolidated Statements of Operations for the fiscal years ended March 31, 2017, 2016, and 2015: (Amounts in thousands) 2017 2016 2015 Component of income before income taxes: Cost of goods sold $ 177 $ (300 ) $ 1,100 Selling expenses 177 (500 ) 1,500 General and administrative expenses 7,953 (5,068 ) 21,647 Total stock-based compensation expense (benefit) $ 8,307 $ (5,868 ) $ 24,247 The following table summarizes stock-based compensation expense (benefit) by award type for the fiscal years ended March 31, 2017, 2016, and 2015: (Amounts in thousands) 2017 2016 2015 Stock-based compensation expense (benefit): Liability-classified Stock Options $ 4,936 $ (6,784 ) $ 21,666 Equity-classified Stock Options 108 — — Restricted Stock 1,945 916 1,681 Non-Employee Director 1,318 — 900 Total stock-based compensation expense (benefit) $ 8,307 $ (5,868 ) $ 24,247
Summary of Unvested Restricted Stock Grants	The information about the unvested restricted stock grants as of March 31, 2017 is as follows: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 112 $ 12.65 Granted 191 24.20 Vested (49 ) 16.15 Forfeited — Unvested at end of year 254 $ 21.92
Non Employee Director Compensation Plan [Member]
Schedule of Unvested Stock Option Grants	The following table summarizes information about the unvested Non-Employee Director Compensation stock grants as of March 31, 2017 : 2017 (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year — — Granted 77 $ 24.20 Vested (37 ) 24.20 Unvested at end of year 40 $ 24.20
Liability-Classified Stock Options [Member]
Schedule of Estimate Fair Value of Stock Options Granted	The following table summarizes the assumptions used in estimating the fair value of liability-classified stock options: 2017 2016 2015 Common stock price $18.70 - $28.17 $18.34 - $33.03 $14.33 - $29.94 Expected stock price volatility 29.6% - 33.0% 31.1% - 39.3% 28.2% - 51.0% Risk-free interest rate 0.9% - 1.9% 0.5% - 1.5% 0.1% - 1.8% Weighted-average expected option life (years) 0.5 – 5.1 0.5 – 6.2 0.5 - 7.2 Dividend yield 0.9% 0.9% 0.5%
Liability-Classified Stock Options [Member] | 2000 Stock Option Plan [Member]
Schedule of Stock Option Activity	The stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year 515 $ 11.82 4.2 Granted — — — Exercised (292 ) 10.63 — Forfeited (28 ) 12.50 — Outstanding at end of year 195 13.31 5.4 Vested at end of year 136 12.26 4.7 Unvested at end of year 59 15.74 7.0 Fair value of options granted during the year $ —
Schedule of Unvested Stock Option Grants	The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 76 $ 6.76 Granted — — Vested — — Forfeitures (17 ) 6.76 Unvested at end of year 59 $ 6.76
Liability-Classified Stock Options [Member] | 2013 Stock Option Plan [Member]
Schedule of Stock Option Activity	The liability-classified stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year 1,911 $ 13.64 7.4 Issued — — — Exercised (66 ) 13.64 — Forfeited (99 ) 13.64 — Outstanding at end of year 1,746 13.64 6.0 Vested at end of year 1,125 13.64 6.0 Unvested at end of year 621 13.64 6.0 Fair value of options granted during the year $ —
Schedule of Unvested Stock Option Grants	The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year 1,095 $ 6.22 Vested (375 ) — Forfeited (99 ) 6.22 Unvested at end of year 621 $ 6.22
Equity-Classified Stock Options [Member]
Schedule of Estimate Fair Value of Stock Options Granted	following table summarizes the assumptions used in estimating the fair value of the equity-classified stock options: 2017 Common stock price $24.20 Expected stock price volatility 31.5% - 35.6% Risk-free interest rate 2.0% - 2.2% Weighted-average expected option life (years) 4.9 – 6.1 Dividend yield 1.0%
Schedule of Stock Option Activity	The equity-classified stock option activity for the fiscal year ended March 31, 2017 is summarized as follows: (Share amounts in thousands) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of year — — Granted 514 $ 24.20 — Exercised — — — Forfeited — — — Outstanding at end of year 514 24.20 9.0 Vested at end of year 15 24.20 9.0 Unvested at end of year 499 24.20 9.0 Fair value of options granted during the year $ 7.81
Schedule of Unvested Stock Option Grants	The following table summarizes information about the unvested stock option grants as of the fiscal year ended March 31, 2017: (Share amounts in thousands) Number of Shares Weighted Average Grant Date Fair Value Unvested at beginning of year — — Granted 514 $ 7.81 Vested (15 ) 6.72 Forfeited — — Unvested at end of year 499 $ 7.84

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Before Income Taxes of Domestic and Foreign Operations	The components of Income before income taxes for the fiscal years ended March 31 are as follows: (Amounts in thousands) 2017 2016 2015 United States $ 59,543 $ 45,159 $ (4,381 ) Foreign 5,288 14,140 9,304 Total $ 64,831 $ 59,299 $ 4,923
Schedule of Income Tax Expense	The components of Income tax expense for the fiscal years ended March 31 consisted of the following: (Amounts in thousands) 2017 2016 2015 Current: Federal $ 24,318 $ 6,889 $ 20,592 State and local 4,652 2,126 3,655 Foreign 3,040 3,791 831 Total current tax expense 32,010 12,806 25,078 Deferred: Federal (5,887 ) 10,019 (16,270 ) State and local (1,297 ) 1,431 (2,626 ) Foreign (211 ) (758 ) 102 Total deferred tax expense (benefit) (7,395 ) 10,692 (18,794 ) Total Income tax expense $ 24,615 $ 23,498 $ 6,284
Effective Tax Rate Varied from Statutory Federal Income Tax Rate	For the fiscal years ended March 31, the effective tax rate varied from the statutory Federal income tax rate as a result of the following factors: 2017 2016 2015 Federal statutory rate 35.0 % 35.0 % 35.0 % Redeemable convertible preferred stock dividend (0.8 ) (0.8 ) (3.8 ) ESOP stock appreciation 4.9 5.8 82.3 ESOP compensation for Special Dividend on unallocated shares — — 0.2 Effect of tax rate of foreign subsidiaries 1.3 0.8 (9.3 ) State and local taxes—net of federal income tax benefit 4.1 4.3 19.7 Stock-based compensation 0.3 (1.8 ) 64.7 Uncertain tax position change (1.1 ) (3.6 ) (35.2 ) Qualified production activity credit (3.3 ) (0.9 ) (37.1 ) Executive repurchase agreement — — 7.2 Closure of Puerto Rico (4.2 ) — — Other 1.8 0.8 3.9 Effective rate 38.0 % 39.6 % 127.6 %
Schedule of Deferred Tax Assets and Liabilities	The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at March 31 were comprised of: (Amounts in thousands) 2017 2016 Deferred tax assets: State income taxes $ 1,474 $ 1,927 ESOP loan repayment 1,363 1,390 Receivable and other allowances 2,660 2,150 Derivatives (15 ) 4,397 Inventory 5,820 1,433 Non-qualified stock options 6,052 4,309 Executive termination payments (Note 15) 2,044 1,852 Accrued Expenses 411 1,378 Worker’s compensation 1,323 1,390 Contingent consideration 91 533 Foreign net operating losses 2,223 1,507 Other 2,856 2,491 Total deferred tax assets 26,302 24,757 Less: valuation allowance (2,223 ) (1,507 ) Total net deferred tax assets 24,079 23,250 Deferred tax liabilities: Intangible assets 7,214 8,882 Property, plant and equipment 51,599 52,115 Leases 724 6,059 Capitalized software costs 3,200 2,935 Goodwill 3,886 3,643 Other 761 1,867 Total deferred tax liabilities 67,384 75,501 Net deferred tax liability $ 43,305 $ 52,251 Net deferred tax assets are included in Deferred income taxes and other current assets and Other assets on the Consolidated Balance Sheets. The related balances at March 31 were as follows: (Amounts in thousands) 2017 2016 Net current deferred tax assets $ — $ 11,701 Net non-current deferred tax assets 702 — Net non-current deferred tax liabilities 44,007 63,952
Reconciliation of Beginning and Ending Balance of Unrecognized Tax Benefits	As of March 31, 2017, the Company had unrecognized tax benefit of $6.2 million, which if resolved favorably, would reduce income tax expense by $6.2 million. A reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years ended March 31, 2017, 2016, and 2015 is as follows: (Amounts in thousands) Balance as of March 31, 2014 $ 12,855 Decreases in tax positions for prior years (672 ) Increases in tax positions for prior years 336 Settlements — Lapse of statute of limitations (2,067 ) Balance as of March 31, 2015 $ 10,452 Tax positions taken in current year 917 Decreases in tax positions for prior years (599 ) Increases in tax positions for prior years 358 Settlements — Lapse of statute of limitations (3,130 ) Balance as of March 31, 2016 $ 7,998 Tax positions taken in current year — Decreases in tax positions for prior years (1,786 ) Increases in tax positions for prior years 80 Settlements — Lapse of statute of limitations (96 ) Balance as of March 31, 2017 $ 6,196

Net Income (Loss) Per Share (Ta

Net Income (Loss) Per Share (Tables)	12 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Summary of Net Income (Loss) Per Share	The following table presents information necessary to calculate net income (loss) per share for the fiscal years ended March 31, 2017, 2016, and 2015, as well as potentially dilutive securities excluded from the weighted average number of diluted common shares outstanding because their inclusion would have been anti-dilutive: (Amounts in thousands, except per share data) 2017 2016 2015 NET INCOME (LOSS) PER SHARE — BASIC: Net income (loss) attributable to ADS $ 32,950 $ 25,052 $ (7,827 ) Adjustment for: Change in fair value of redeemable convertible preferred stock — — (11,054 ) Accretion of redeemable noncontrolling interest in subsidiaries (1,560 ) (932 ) — Dividends paid to redeemable convertible preferred stockholders (1,646 ) (1,425 ) (661 ) Dividends paid to unvested restricted stockholders (73 ) (24 ) (11 ) Net income (loss) available to common stockholders and participating securities 29,671 22,671 (19,553 ) Undistributed income allocated to participating securities (1,700 ) (1,270 ) — Net income (loss) available to common stockholders — Basic 27,971 21,401 (19,553 ) Weighted average number of common shares outstanding — Basic 54,919 53,978 51,344 Net income (loss) per common share — Basic $ 0.51 $ 0.40 $ (0.38 ) NET INCOME (LOSS) PER SHARE — DILUTED: Net income (loss) available to common stockholders — Diluted 27,971 21,401 (19,553 ) Weighted average number of common shares outstanding — Basic 54,919 53,978 51,344 Assumed exercise of stock options 705 1,198 — Weighted average number of common shares outstanding — Diluted 55,624 55,176 51,344 Net income (loss) per common share — Diluted $ 0.50 $ 0.39 $ (0.38 ) Potentially dilutive securities excluded as anti- dilutive 6,228 6,383 5,395

Business Segment Information (T

Business Segment Information (Tables)	12 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Schedule of Revenue from Reportable Segments by Product Type	The following table sets forth reportable segment information with respect to the amount of Net sales contributed by each class of similar products in each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Domestic Pipe $ 786,546 $ 812,071 $ 771,214 Allied Products 315,690 301,725 256,719 Total domestic 1,102,236 1,113,796 1,027,933 International Pipe 122,384 139,731 125,407 Allied Products 32,641 37,151 26,733 Total international 155,025 176,882 152,140 Total net sales $ 1,257,261 $ 1,290,678 $ 1,180,073
Schedule of Additional Financial Information Attributable to Reportable Segments	The following sets forth certain additional financial information attributable to the reportable segments for the fiscal years ended March 31 . (Amounts in thousands) 2017 2016 2015 Segment Adjusted EBITDA Domestic $ 175,676 $ 162,875 $ 128,973 International 17,695 24,465 14,904 Total $ 193,371 $ 187,340 $ 143,877 Interest expense Domestic $ 17,049 $ 17,908 $ 19,308 International 418 552 60 Total $ 17,467 $ 18,460 $ 19,368 Income tax expense Domestic $ 21,786 $ 20,465 $ 5,351 International 2,829 3,033 933 Total $ 24,615 $ 23,498 $ 6,284 Depreciation and amortization Domestic $ 63,747 $ 62,625 $ 59,397 International 8,608 8,384 6,075 Total $ 72,355 $ 71,009 $ 65,472 Equity in net (loss) income of unconsolidated affiliates Domestic $ (505 ) $ 181 $ 289 International (3,803 ) (5,415 ) (2,624 ) Total $ (4,308 ) $ (5,234 ) $ (2,335 ) Capital expenditures Domestic $ 39,642 $ 37,242 $ 29,345 International 7,034 7,700 2,735 Total $ 46,676 $ 44,942 $ 32,080 The following sets forth certain additional financial information attributable to the reportable segments as of March 31: (Amounts in thousands) 2017 2016 Investments in unconsolidated affiliates Domestic $ 2,427 $ 2,932 International 6,559 10,256 Total $ 8,986 $ 13,188 Total identifiable assets Domestic $ 917,006 $ 949,286 International 134,987 147,814 Eliminations (5,708 ) (59,784 ) Total $ 1,046,285 $ 1,037,316
Schedule of Reconciliation of Segment Adjusted EBITDA to Net Income	Reconciliation of Segment Adjusted EBITDA to Net income 2017 2016 2015 (Amounts in thousands) Domestic International Domestic International Domestic International Net income (loss) $ 35,118 $ 790 $ 24,875 $ 5,692 $ (9,443 ) $ 5,747 Depreciation and amortization 63,747 8,608 62,625 8,384 59,397 6,075 Interest expense 17,049 418 17,908 552 19,308 60 Income tax expense 21,786 2,829 20,465 3,033 5,351 933 Segment EBITDA 137,700 12,645 125,873 17,661 74,613 12,815 Derivative fair value adjustments (10,921 ) — 2,139 24 7,774 (28 ) Foreign currency transaction (gains) losses — (1,629 ) — 697 5,636 (232 ) Loss (gain) on sale of business or disposal of assets 4,793 3,716 892 (80 ) 257 105 Unconsolidated affiliates interest, taxes, depreciation and amortization (a) 1,088 1,663 1,052 2,163 1,341 2,244 Contingent consideration remeasurement (265 ) — 371 — 174 — Stock-based compensation expense (benefit) 8,307 — (5,868 ) — 24,247 — ESOP deferred stock-based compensation 9,568 — 10,250 — 12,144 — Expense (benefit) related to executive termination payments 1,092 — (294 ) — 328 — Expense related to executive stock repurchase agreements — — — — 1,011 — Loss related to BaySaver step acquisition — — 490 — — — Inventory step up related to PTI acquisition 525 — — — — — Bargain purchase gain on PTI acquisition (609 ) — — — — — Restatement-related costs (b) 24,026 — 27,970 — — — Impairment on investment in unconsolidated affiliate — 1,300 — 4,000 — — Transaction costs (c) 372 — — — 1,448 — Segment Adjusted EBITDA (d) $ 175,676 $ 17,695 $ 162,875 $ 24,465 $ 128,973 $ 14,904 (a) Includes the Company’s proportional share of interest, income taxes, depreciation and amortization related to its South American Joint Venture and its Tigre-ADS USA Joint Venture, which are accounted for under the equity method of accounting. In addition, these amounts include the Company’s proportional share of interest, income taxes, depreciation and amortization related to its BaySaver Joint Venture prior to the step acquisition of BaySaver on July 17, 2015, which was previously accounted for under the equity method of accounting. (b) Represents expenses recorded related to legal, accounting and other professional fees incurred in connection with the restatement of the prior period financial statements as reflected in the fiscal year 2015 Form 10-K and fiscal year 2016 Form 10-K/A. (c) Represents expenses recorded related to legal, accounting and other professional fees incurred in connection with the debt refinancing, the IPO and secondary public offering and asset acquisitions and dispositions. (d) A portion of the reduction in International EBITDA is related to transfer pricing. The reduction is fully offset by an increase in Domestic EBITDA.
Net Sales and Long-Lived Asset by Geographic Location	Geographic Sales and Assets Information Net sales are attributed to the geographic location based on the location of the customer. The table below represents the Net sales and long-lived asset information by geographic location for each of the fiscal years ended March 31: (Amounts in thousands) 2017 2016 2015 Net Sales North America $ 1,243,074 $ 1,274,700 $ 1,161,909 Other 14,187 15,978 18,164 Total $ 1,257,261 $ 1,290,678 $ 1,180,073 (Amounts in thousands) 2017 2016 Long-Lived Assets (a) North America $ 411,752 $ 395,716 Other 6,559 10,256 Total $ 418,311 $ 405,972 (a) For segment reporting purposes, long-lived assets include Investments in unconsolidated affiliates, Central parts and Property, plant and equipment.

Supplemental Disclosures of C50

Supplemental Disclosures of Cash Flow Information (Tables)	12 Months Ended
	Mar. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Increase (Decrease) in Cash Due to Changes Working Capital	The increase (decrease) in cash due to the changes in working capital accounts for the fiscal years ended March 31, were as follows: (Amounts in thousands) 2017 2016 2015 Changes in working capital: Receivables $ 15,055 $ (37,788 ) $ (10,351 ) Inventories (27,917 ) 28,330 (7,663 ) Prepaid expenses and other current assets (2,548 ) 646 1,953 Accounts payable, accrued expenses, and other liabilities 6,851 10,156 (767 ) Total $ (8,559 ) $ 1,344 $ (16,828 )
Supplemental Disclosures Cash Flow Information	Supplemental disclosures of cash flow information for the fiscal years ended March 31 were as follows: (Amounts in thousands) 2017 2016 2015 Supplemental disclosures of cash flow information — cash paid during years: Interest $ 17,273 $ 18,352 $ 18,709 Income taxes 13,525 32,175 28,503 (Amounts in thousands) 2017 2016 2015 Supplemental schedule of noncash investing and financing activities: Redeemable convertible preferred stock dividend $ 134 $ 132 $ 127 Redemption of common stock to exercise stock options — — 93 Purchases of plant, property, and equipment included in accounts payable 2,549 1,165 124 Receivable recorded for sale of businesses — 150 600 ESOP distributions in common stock 7,425 10,250 6,133 Assets acquired and obligation incurred under capital lease 26,276 34,207 24,047 Lease obligation retired upon disposition of leased assets 390 134 779 Reclassification of liability-classified stock options and restricted stock to equity 4,147 3,702 12,141 Reclassification of stock repurchase agreement liability and mezzanine equity to equity — — 19,729 Payable recorded for business acquisition 950 — — Reclassification of deferred public offering cost asset upon initial public offering — — 456

Quarterly Financial Informati51

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Mar. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Financial Information	The following tables set forth certain historical unaudited consolidated condensed quarterly financial information for each of the quarters during the years ended March 31, 2017 and 2016. Fiscal Year 2017 For the Three Months Ended (in thousands, except per share amounts) March 31, 2017 December 31, 2016 September 30, 2016 June 30, 2016 Net sales $ 244,184 $ 294,716 $ 360,785 $ 357,576 Gross profit 39,251 69,441 90,512 96,606 Net (loss) income (18,052 ) 10,258 24,281 19,421 Net (loss) income attributable to ADS (18,110 ) 9,053 23,734 18,273 Net (loss) income per share Basic (1) $ (0.34 ) $ 0.14 $ 0.38 $ 0.29 Diluted (1) $ (0.34 ) $ 0.14 $ 0.38 $ 0.29 Fiscal Year 2016 For the Three Months Ended (in thousands, except per share amounts) March 31, 2016 December 31, 2015 September 30, 2015 June 30, 2015 Net sales $ 245,398 $ 312,827 $ 383,329 $ 349,124 Gross profit 49,504 74,842 86,529 74,477 Net (loss) income (11,085 ) 12,942 15,928 12,782 Net (loss) income attributable to ADS (12,119 ) 13,131 12,346 11,694 Net (loss) income per share Basic (1) $ (0.24 ) $ 0.21 $ 0.20 $ 0.19 Diluted (1) $ (0.24 ) $ 0.21 $ 0.19 $ 0.19 (1) The earnings per share calculations for each quarter are based upon the applicable weighted average shares outstanding for each period and may not necessarily be equal to the full year share amount.

Background and Summary of Sig52

Background and Summary of Significant Accounting Policies - Additional Information (Detail)	Dec. 15, 2014USD ($)$ / sharesshares	Dec. 09, 2014USD ($)$ / sharesshares	Aug. 22, 2014$ / sharesshares	Jul. 25, 2014USD ($)$ / sharesshares	Jul. 11, 2014	Mar. 31, 2017USD ($)SegmentCustomer$ / sharesshares	Mar. 31, 2016USD ($)$ / sharesshares	Mar. 31, 2015USD ($)
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments | Segment						2
Net proceeds from initial public offering								$ 79,131,000
Offering price per share | $ / shares						$ 0.01	$ 0.01
Common stock, shares issued | shares						153,560,000	153,560,000
Interest capitalized						$ 600,000	$ 400,000	500,000
Impairment charges for goodwill						0	0	0
Impairment charges for intangible assets						0	0	0
Shipping costs						120,400,000	120,500,000	121,000,000
Advertising costs						3,100,000	3,200,000	2,500,000
Life, accidental death and dismemberment and medical coverage						39,500,000	37,500,000	32,000,000
Self insurance plan employees contribution						5,100,000	4,500,000	4,100,000
Total claims expense, self insurance						$ 2,100,000	3,900,000	$ 1,400,000
Minimum likelihood percentage of tax benefit to be realized upon settlement						50.00%
Net current deferred tax assets							11,701,000
Deferred Income Taxes and Other Current Assets [Member] | Adjustments for New Accounting Principle, Early Adoption [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Net current deferred tax assets						$ 0	$ 11,700,000
Sales Revenue, Net [Member] | Ferguson Enterprises and HD Supply Waterworks [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Number of customers in the customer base | Customer						20,000
Concentration risk description						The Company has a large, active customer base of approximately twenty thousand customers with two customers, Ferguson Enterprises and HD Supply Waterworks, each representing more than 10% of annual net sales.
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Ferguson Enterprises and HD Supply Waterworks [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage						23.50%	21.10%	20.30%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Ferguson Enterprises [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage						15.70%	14.00%
Other General Insurance Programs [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Total claims expense, self insurance						$ 1,800,000	$ 2,100,000	$ 600,000
Sales [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Shipping costs						5,500,000	7,000,000	$ 9,300,000
South American Joint Venture [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Other assets, impairment charges						$ 1,300,000	$ 4,000,000
Minimum [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Capitalized software development costs estimated useful lives						2 years
Central parts estimated useful lives						8 years
Claims per incident						$ 300,000
Minimum [Member] | Other General Insurance Programs [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Claims per occurrence						$ 300,000
Maximum [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Capitalized software development costs estimated useful lives						10 years
Central parts estimated useful lives						30 years
Maximum [Member] | Other General Insurance Programs [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Claims per occurrence						$ 500,000
IPO [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Common and preferred stock conversion split ratio, description						4.707-for-one split
Common and preferred stock conversion split ratio					4.707
Additional shares issued | shares			600,000	5,300,000
Net proceeds from initial public offering				$ 79,100,000
Underwriter discounts and commissions on initial public offering				$ 5,500,000
Share price | $ / shares			$ 16	$ 16
Other offering expenses				$ 6,900,000
Indebtedness under the revolving portion of credit facility				$ 72,200,000
Secondary Public Offering [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Additional shares issued | shares		10,000,000
Offering price per share | $ / shares	$ 21.25	$ 21.25
Proceeds from sale of shares	$ 0	$ 0
Common stock, shares issued | shares	1,500,000

Background and Summary of Sig53

Background and Summary of Significant Accounting Policies - Summary of Receivables (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 168,943	$ 186,883
Trade Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	160,655	158,664
Refundable Income Taxes [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	1,468	19,783
Other Miscellaneous Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 6,820	$ 8,436

Background and Summary of Sig54

Background and Summary of Significant Accounting Policies - Estimated Useful Lives of Related Assets (Detail)	12 Months Ended
	Mar. 31, 2017
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	45 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	18 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	Shorter of useful life or life of lease

Background and Summary of Sig55

Background and Summary of Significant Accounting Policies - Other assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Other Assets Noncurrent [Abstract]
Investments in unconsolidated affiliates	$ 8,986	$ 13,188
Cash surrender value of officer life insurance	12,028	10,739
Capitalized software development costs, net	7,980	7,264
Deposits	1,289	1,319
Central parts	1,856	1,040
Other	14,398	11,706
Total other assets	$ 46,537	$ 45,256

Background and Summary of Sig56

Background and Summary of Significant Accounting Policies - Amortization Expense Related to Other Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Adjustment For Amortization [Abstract]
Capitalized software development costs	$ 3,372	$ 3,872	$ 3,550
Central parts	54	362	55
Other	$ 1,689	$ 1,898	$ 1,977

Loss on Disposal of Assets an57

Loss on Disposal of Assets and Costs from Exit and Disposal Activities - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2015USD ($)	Mar. 31, 2017USD ($)Facility	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss on disposition of the equipment		$ 8,500,000	$ 800,000	$ 1,100,000
Number of manufacturing facilities closed | Facility		3
Expenses related to closing of manufacturing facilities		$ 3,500,000
Accelerated depreciation on identified obsolete assets		3,000,000
Amount of disposals and partial disposals of fixed assets		$ 2,000,000
Cash proceeds from sale				538,000
Miscellaneous [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales price	$ 800,000			800,000
Cash proceeds from sale	200,000
Other consideration in the form of a note receivable	600,000
Net book value of assets or businesses	0			$ 0
Gain on sale	$ 800,000

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($)	Feb. 06, 2017	Jul. 17, 2015	Jan. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Jul. 31, 2015
Business Acquisition [Line Items]
Intangible assets				$ 92,842,000	$ 109,164,000
Goodwill				100,566,000	100,885,000	$ 98,679,000
Depreciation and amortization				(72,355,000)	(71,009,000)	(65,472,000)
BaySaver [Member]
Business Acquisition [Line Items]
Purchase price		$ 14,500,000
Cash paid at acquisition date		$ 3,200,000
Additionally acquired percentage of ownership in joint ventures		10.00%					10.00%
Percentage of voting interests acquired		65.00%
Fair value of contingent consideration		$ 750,000
Business combination equity interest remeasurement loss		500,000
Goodwill		2,495,000
Net sales of acquired entity included in condensed consolidated statements of operations					10,200,000
Earnings from operations of acquired entity included in condensed consolidated statements of operations					1,200,000
BaySaver [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Intangible asset amortization expense, net of related income taxes					100,000	300,000
Equity method investments net of related income taxes					100,000	300,000
Maximum [Member] | BaySaver [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Interest expense, net of related income taxes					100,000	100,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets				40,767,000	40,732,000
Customer Relationships [Member] | BaySaver [Member]
Business Acquisition [Line Items]
Intangible assets		$ 5,400,000
Intangible assets, useful life		10 years
Developed Technology [Member]
Business Acquisition [Line Items]
Intangible assets				27,580,000	44,579,000
Developed Technology [Member] | BaySaver [Member]
Business Acquisition [Line Items]
Intangible assets		$ 4,000,000
Intangible assets, useful life		10 years
Trademarks and Tradenames [Member]
Business Acquisition [Line Items]
Intangible assets				15,741,000	$ 15,563,000
Trademarks and Tradenames [Member] | BaySaver [Member]
Business Acquisition [Line Items]
Intangible assets		$ 1,400,000
Intangible assets, useful life		10 years
Plastic Tubing Industries [Member]
Business Acquisition [Line Items]
Purchase price	$ 9,500,000
Cash paid at acquisition date	8,500,000
Consideration payable	1,000,000
Depreciation and amortization				600,000
Plastic Tubing Industries [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible asset amortization expense, net of related income taxes				$ 100,000
Plastic Tubing Industries [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets	$ 200,000
Intangible assets, useful life	7 years
Ideal Pipe [Member]
Business Acquisition [Line Items]
Purchase price			$ 43,828,000
Goodwill			10,700,000
Transaction costs related to the purchase of Ideal Pipe			5,600,000
Ideal Pipe [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Intangible asset amortization expense, net of related income taxes						700,000
Interest expense, net of related income taxes						500,000
Ideal Pipe [Member] | Maximum [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Depreciation and amortization						$ (100,000)
Ideal Pipe [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets			$ 3,100,000
Intangible assets, useful life			10 years
Ideal Pipe [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets			$ 4,900,000
Intangible assets, useful life			7 years
Ideal Pipe [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Intangible assets			$ 300,000
Intangible assets, useful life			3 years

Acquisitions - Summary of Purch

Acquisitions - Summary of Purchase Price Allocation (Detail) - USD ($) $ in Thousands	Feb. 06, 2017	Mar. 31, 2017	Mar. 31, 2016	Jul. 17, 2015	Mar. 31, 2015	Jan. 30, 2015
Business Acquisition [Line Items]
Goodwill		$ 100,566	$ 100,885		$ 98,679
Gain on bargain purchase		$ 609
BaySaver [Member]
Business Acquisition [Line Items]
Intangible assets				$ 10,800
Cash				12
Other current assets				2,262
Property, plant and equipment				164
Goodwill				2,495
Other assets				152
Current liabilities				(1,385)
Total purchase price				$ 14,500
Plastic Tubing Industries [Member]
Business Acquisition [Line Items]
Intangible assets	$ 160
Inventory	2,050
Property, plant and equipment	7,899
Fair value of net assets acquired	10,109
Total purchase price	9,500
Gain on bargain purchase	$ 609
Ideal Pipe [Member]
Business Acquisition [Line Items]
Cash						$ 7,443
Other current assets						9,036
Property, plant and equipment						27,258
Goodwill						10,700
Goodwill and intangible assets						18,890
Current liabilities						(12,721)
Non-current liabilities						(6,078)
Total purchase price						$ 43,828

Acquisitions - Effect of Acquis

Acquisitions - Effect of Acquisitions for Unaudited Pro Forma Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
BaySaver [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net sales		$ 1,294,277	$ 1,190,749
Net income (loss) attributable to ADS		25,090	(7,799)
Plastic Tubing Industries [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net sales	$ 1,266,602	1,302,120
Net income (loss) attributable to ADS	$ 33,634	$ 25,100
Ideal Pipe [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net sales			1,217,431
Net income (loss) attributable to ADS			$ (6,118)

Acquisition - Schedule of Busin

Acquisition - Schedule of Business Acquisitions by Acquisition, Contingent Consideration (Detail) - BaySaver [Member] $ in Thousands	Jul. 17, 2015USD ($)
Business Acquisition [Line Items]
Acquisition-date fair value of prior equity interest	$ 4,220
Acquisition-date fair value of noncontrolling interest	6,330
Cash paid at acquisition date	3,200
Fair value of contingent consideration	750
Total purchase price	$ 14,500

Property, Plant, and Equipment

Property, Plant, and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Property, Plant and Equipment [Line Items]
Construction in progress	$ 14,022	$ 14,902
Property, plant and equipment, gross	975,063	923,882
Less accumulated depreciation	(568,205)	(532,138)
Property, plant and equipment, net	406,858	391,744
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	189,163	178,189
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 771,878	$ 730,791

Property, Plant, and Equipmen63

Property, Plant, and Equipment - Depreciation Expense Related to Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Property Plant And Equipment [Abstract]
Depreciation expense (inclusive of leased assets depreciation)	$ 58,692	$ 55,650	$ 50,136

Leases - Summary of Leased Asse

Leases - Summary of Leased Assets Included in Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Capital Leased Assets [Line Items]
Total cost	$ 205,857	$ 192,389
Less accumulated depreciation	(108,144)	(102,572)
Leased assets in Property, plant and equipment, net	97,713	89,817
Buildings and Improvements [Member]
Capital Leased Assets [Line Items]
Total cost	6,044	6,131
Machinery and Equipment [Member]
Capital Leased Assets [Line Items]
Total cost	$ 199,813	$ 186,258

Leases - Schedule of Interest a

Leases - Schedule of Interest and Depreciation Expense Related to Capital Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Leases [Abstract]
Lease interest expense	$ 3,864	$ 3,367	$ 2,249
Depreciation of leased assets	$ 17,415	$ 15,782	$ 13,943

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments under Capital Leases and Present Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments [Abstract]
2,018	$ 24,329
2,019	19,784
2,020	15,681
2,021	12,521
2,022	9,271
Thereafter	6,072
Total minimum lease payments	87,658
Less: amount representing interest	7,498
Present value of net minimum lease payments	80,160
Current maturities of capital lease obligations	21,450	$ 19,231
Long-term capital lease obligations	58,710	$ 56,809
Total lease obligation	$ 80,160

Leases - Schedule of Future M67

Leases - Schedule of Future Minimum Lease Payments under Capital Leases and Present Value (Parenthetical) (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments [Abstract]
Contingent rentals amount	$ 0.6	$ 0.1	$ 0.8

Leases - Summary of Future Mini

Leases - Summary of Future Minimum Rental Commitments under Operating Leases (Detail) $ in Thousands	Mar. 31, 2017USD ($)
Leases Operating [Abstract]
Future operating lease payments, 2018	$ 3,004
Future operating lease payments, 2019	2,531
Future operating lease payments, 2020	1,921
Future operating lease payments, 2021	1,381
Future operating lease payments, 2022	755
Future operating lease payments, thereafter	$ 3,100

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Leases [Abstract]
Total rent expense	$ 6.6	$ 6.3	$ 4

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 52,746	$ 46,604
Finished goods	205,684	183,862
Total Inventories	$ 258,430	$ 230,466

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($)	Mar. 31, 2017	Mar. 31, 2016
Inventory Disclosure [Abstract]
Work-in-process inventories	$ 0	$ 0
General and administrative cost in inventory	21,200,000	18,000,000
General and administrative cost remained in inventory	$ 6,300,000	$ 5,300,000

Goodwill and Intangible Asset72

Goodwill and Intangible Assets - Carrying Amount of Goodwill by Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill [Line Items]
Beginning balance	$ 100,885	$ 98,679
Acquisition		2,495
Currency translation	(319)	(289)
Ending balance	100,566	100,885
Domestic [Member]
Goodwill [Line Items]
Beginning balance	90,002	87,507
Acquisition		2,495
Ending balance	90,002	90,002
International [Member]
Goodwill [Line Items]
Beginning balance	10,883	11,172
Currency translation	(319)	(289)
Ending balance	$ 10,564	$ 10,883

Goodwill and Intangible Asset73

Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible	$ 92,842	$ 109,164
Accumulated Amortization	(52,991)	(61,221)
Net Intangible	39,851	47,943
Intangible Assets, Gross	104,749	121,090
Intangible assets, net	51,758	59,869
Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	11,907	11,926
Developed Technology [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible	27,580	44,579
Accumulated Amortization	(14,888)	(29,371)
Net Intangible	12,692	15,208
Customer Relationships [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible	40,767	40,732
Accumulated Amortization	(26,768)	(22,646)
Net Intangible	13,999	18,086
Patents [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible	7,512	7,048
Accumulated Amortization	(4,768)	(4,167)
Net Intangible	2,744	2,881
Non-compete and Other Contractual Agreements [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible	1,242	1,242
Accumulated Amortization	(1,102)	(842)
Net Intangible	140	400
Trademarks and Tradenames [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible	15,741	15,563
Accumulated Amortization	(5,465)	(4,195)
Net Intangible	$ 10,276	$ 11,368

Goodwill and Intangible Asset74

Goodwill and Intangible Assets - Weighted Average Amortization Period for Definite-Lived Intangible Assets (Detail)	12 Months Ended
	Mar. 31, 2017
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period	11 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period	8 years 6 months
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period	8 years 3 months 18 days
Non-compete and Other Contractual Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period	5 years 1 month 6 days
Trademarks and Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period	13 years 6 months

Goodwill and Intangible Asset75

Goodwill and Intangible Assets - Future Intangible Asset Amortization Expense (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense, 2018	$ 7,847
Amortization expense, 2019	7,692
Amortization expense, 2020	6,006
Amortization expense, 2021	5,865
Amortization expense, 2022	4,224
Amortization expense, Thereafter	8,217
Net Intangible	$ 39,851	$ 47,943

Fair Value Measurement - Summar

Fair Value Measurement - Summary of Assets and Liabilities Carried at Fair Value (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a recurring basis	$ 179	$ 11
Contingent consideration for acquisitions	1,348	2,858
Total liabilities at fair value on a recurring basis	1,490	13,752
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a recurring basis	179	11
Total liabilities at fair value on a recurring basis	142	10,894
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration for acquisitions	1,348	2,858
Total liabilities at fair value on a recurring basis	1,348	2,858
Diesel Fuel Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	179
Derivative liability	142	2,615
Diesel Fuel Contracts [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	179
Derivative liability	$ 142	2,615
Foreign Exchange Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		11
Foreign Exchange Forward Contracts [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		11
Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability		252
Interest Rate Swaps [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability		252
Propylene Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability		8,027
Propylene Swaps [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability		$ 8,027

Fair Value Measurement - Summ77

Fair Value Measurement - Summary of Quantitative Information about Level 3 Fair Value Measurements (Detail) - Contingent Consideration for Acquisitions [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Liabilities & Mezzanine Equity	$ 1,348	$ 2,858
Discounted Cash Flow [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Valuation Technique(s)	Discounted cash flow
Unobservable Input	Unobservable Input Weighted Average Cost of Capital (“WACC”)(a)
Quantifiable Input	9.50%
Discounted Cash Flow [Member] | Minimum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Quantifiable Input		9.75%
Discounted Cash Flow [Member] | Maximum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Quantifiable Input		10.00%

Fair Value Measurement - Summ78

Fair Value Measurement - Summary of Changes in Fair Value of Recurring Fair Value Measurements Using Unobservable Inputs (Detail) - Level 3 [Member] - Contingent Consideration [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance beginning	$ 2,858	$ 2,444
Acquisition		750
Change in fair value	(266)	371
Payments of contingent consideration liability	(1,244)	(707)
Balance ending	$ 1,348	$ 2,858

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets and liabilities, additional transfers	$ 0	$ 0
Level 3 [Member] | South American Joint Venture [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount the future cash flow rates	9.30%
Level 3 [Member] | South American Joint Venture [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount the future cash flow rates	16.50%
Senior Notes Payable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior notes	$ 75,000,000	100,000,000
Senior notes, fair value	$ 75,900,000	$ 101,200,000

Investment in Consolidated Affi

Investment in Consolidated Affiliates - Additional Information (Detail) - JointVenture	12 Months Ended
	Mar. 31, 2017	Jul. 31, 2015	Jul. 17, 2015	Jul. 31, 2013
Investments in and Advances to Affiliates [Line Items]
Number of unconsolidated joint venture participated	2
BaySaver [Member]
Investments in and Advances to Affiliates [Line Items]
Company's ownership percentage	65.00%
Additionally acquired percentage of ownership in joint ventures		10.00%	10.00%
Subsidiaries [Member]
Investments in and Advances to Affiliates [Line Items]
Number of unconsolidated joint venture participated	2
Subsidiaries [Member] | ADS Worldwide, Inc [Member]
Investments in and Advances to Affiliates [Line Items]
Company's ownership percentage	51.00%
Subsidiaries [Member] | BaySaver [Member]
Investments in and Advances to Affiliates [Line Items]
Percentage of ownership in joint ventures	65.00%			55.00%
Percentage of voting interest	50.00%
Additionally acquired percentage of ownership in joint ventures			10.00%
Subsidiaries [Member] | ADS Mexicana [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Investments in and Advances to Affiliates [Line Items]
Company's ownership percentage	51.00%

Investment in Consolidated Af81

Investment in Consolidated Affiliates - Assets and Liabilities of Joint Ventures (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Assets
Current assets	$ 440,566	$ 439,562
Property, plant and equipment, net	406,858	391,744
Other noncurrent assets	46,537	45,256
Total assets	1,046,285	1,037,316
Liabilities
Current liabilities	255,754	252,184
Total liabilities	695,850	723,080
BaySaver [Member]
Assets
Current assets	2,572	3,121
Property, plant and equipment, net	111	140
Other noncurrent assets	11,568	12,668
Total assets	14,251	15,929
Liabilities
Current liabilities	1,344	1,696
Total liabilities	1,344	1,696
ADS Mexicana [Member]
Assets
Current assets	24,952	27,650
Property, plant and equipment, net	19,262	17,461
Other noncurrent assets	2,269	1,742
Total assets	46,483	46,853
Liabilities
Current liabilities	11,042	10,769
Noncurrent liabilities	2,961	5,390
Total liabilities	$ 14,003	$ 16,159

Investment in Unconsolidated Af

Investment in Unconsolidated Affiliates - Additional Information (Detail) $ in Millions	12 Months Ended
	Mar. 31, 2017USD ($)JointVenture	Mar. 31, 2016USD ($)	Apr. 07, 2014USD ($)
Investments in and Advances to Affiliates [Line Items]
Number of unconsolidated joint venture participated | JointVenture	2
South American Joint Venture [Member]
Investments in and Advances to Affiliates [Line Items]
Percentage of ownership in joint ventures	50.00%
Other assets, impairment charges	$ 1.3	$ 4
Difference between cost of investment and amount of underlying equity in net assets	$ 4.9	4
Estimated remaining useful life of underlying fixed assets	9 years
Amortization recognized	$ 0.4	$ 0.1
Tigre-ADS USA [Member]
Investments in and Advances to Affiliates [Line Items]
Percentage of ownership in joint ventures	49.00%		49.00%
Amount paid for acquiring shares			$ 3.6

Investment in Unconsolidated 83

Investment in Unconsolidated Affiliates - Summarized Financial Data of Joint Ventures (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Investments in and Advances to Affiliates [Line Items]
Investment in unconsolidated affiliates	$ 8,986	$ 13,188
South American Joint Venture [Member]
Investments in and Advances to Affiliates [Line Items]
Investment in unconsolidated affiliates	6,559	10,256
Receivable from unconsolidated joint venture	3,639	3,201
Tigre-ADS USA [Member]
Investments in and Advances to Affiliates [Line Items]
Investment in unconsolidated affiliates	2,427	2,932
Receivable from unconsolidated joint venture	$ 9	$ 45

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Feb. 28, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015	Apr. 30, 2015
Related Party Transaction [Line Items]
Outstanding letters of credit		$ 10,600,000
South American Joint Venture [Member]
Related Party Transaction [Line Items]
Percentage of debt guarantee		50.00%
Maximum potential payment under guarantee		$ 11,000,000
Maximum borrowings permitted under credit facility		$ 22,000,000
Debt, expiration date		Dec. 31, 2020
Outstanding letters of credit		$ 16,000,000	$ 16,700,000
Sales with related parties		1,300,000	1,200,000
Sale with joint ventures		$ 900,000	$ 1,800,000
South American Joint Venture [Member] | US Dollar Denominated Loans [Member]
Related Party Transaction [Line Items]
Weighted average interest rate		0.00%
South American Joint Venture [Member] | Chilean Peso Denominated Loans [Member]
Related Party Transaction [Line Items]
Weighted average interest rate		6.58%
BaySaver [Member]
Related Party Transaction [Line Items]
Company's ownership percentage			65.00%
Borrowings outstanding				$ 500,000
Tigre-ADS USA [Member]
Related Party Transaction [Line Items]
Company's ownership percentage		49.00%	49.00%	49.00%
Purchases from related party		$ 1,600,000	$ 700,000	$ 100,000
Pipe Sales Joint Venture Agreement [Member]
Related Party Transaction [Line Items]
Proceeds from sales		0	0	$ 3,800,000
Outstanding receivables from related party		$ 200,000	$ 300,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Related Party Transaction [Line Items]
Company's ownership percentage		51.00%	51.00%	51.00%
Cash payments for consulting services related to the operations of the business and a noncompete arrangement		$ 200,000	$ 200,000	$ 500,000
Guarantee percentage on credit facility		100.00%
Maximum potential guarantee payments		$ 12,000,000
Guarantee description		The Company is the guarantor of 100% of the ADS Mexicana Revolving Credit Facility
ADS Mexicana [Member]
Related Party Transaction [Line Items]
Amount loaned to related party	$ 5,000,000
Interest rate for the loaned amount	2.35%
Outstanding letters of credit		$ 1,500,000
ADS Mexicana [Member] | Credit Facility Arrangement with Scotia Bank [Member]
Related Party Transaction [Line Items]
Interest rate for the loaned amount					4.81%	4.81%
Amount borrowed under revolving credit facility					$ 3,900,000	$ 3,000,000

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Debt Disclosure [Abstract]
Unamortized debt issuance costs	$ 1,723	$ 3,131

Debt - Long-Term Debt (Detail)

Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Debt Instrument [Line Items]
Revolving credit facility	$ 10,600
Total	350,361	$ 351,215
Unamortized debt issuance costs	(1,723)	(3,131)
Current maturities	(37,789)	(35,870)
Long-term debt obligations	310,849	312,214
Equipment Financing [Member]
Debt Instrument [Line Items]
Revolving credit facility	4,216
ADS [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility	194,300	166,000
ADS Mexicana [Member]
Debt Instrument [Line Items]
Revolving credit facility	1,500
ADS Mexicana [Member] | Scotia Bank Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility	1,000
Term Note [Member]
Debt Instrument [Line Items]
Term Note	72,500	82,500
Senior Notes Payable [Member]
Debt Instrument [Line Items]
Senior notes	75,000	100,000
Industrial Revenue Bonds [Member]
Debt Instrument [Line Items]
Industrial revenue bonds	$ 1,845	$ 2,715

Debt (Secured Bank Term Loans)

Debt (Secured Bank Term Loans) - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Debt Instrument [Line Items]
Revolving credit facility interest rate	2.61%	2.70%	2.64%
Outstanding letters of credit	$ 10,600,000
ADS Mexicana [Member]
Debt Instrument [Line Items]
Outstanding letters of credit	1,500,000
Borrowing under line of credit facility	10,500,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowing under line of credit facility	$ 120,100,000
Line of credit facility expiration date	2018-06
Revolving Credit Facility [Member] | ADS [Member]
Debt Instrument [Line Items]
Revolving credit facility outstanding	$ 325,000,000
Outstanding letters of credit	194,300,000	$ 166,000,000
Revolving Credit Facility [Member] | ADS Mexicana [Member]
Debt Instrument [Line Items]
Revolving credit facility outstanding	12,000,000
Revolving Credit Facility [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility outstanding	$ 100,000,000
Term loan maturity date	2018-06
Frequency of periodic payment	Quarterly
Principal payment due	$ 2,500,000

Debt (Senior Notes Payable) - A

Debt (Senior Notes Payable) - Additional Information (Detail) - Senior Notes Payable [Member] - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Jul. 31, 2013	Dec. 31, 2009	Mar. 31, 2017
Debt Instrument [Line Items]
Quarterly interest payable		5.60%
Senior notes		$ 75
Principal payment		25
ADS [Member]
Debt Instrument [Line Items]
Quarterly interest payable	4.05%
Principal payment	$ 25
Senior Notes	$ 25	$ 100
Debt instrument leverage fee			The rate is subject to an additional 200 basis point excess leverage fee if calculated leverage ratio exceeds 3 to 1 at the end of a fiscal quarter.

Debt (Industrial Revenue Bonds)

Debt (Industrial Revenue Bonds) - Additional Information (Detail) - Industrial Revenue Bonds [Member] $ in Millions	12 Months Ended
	Mar. 31, 2017USD ($)Facility	Mar. 31, 2015Bond	Mar. 31, 2011Bond
Debt Instrument [Line Items]
Number of production facilities | Facility	4
Letter of Credit [Member]
Debt Instrument [Line Items]
Debt instrument fee percentage	2.75%
Nontaxable Municipal Bonds [Member]
Debt Instrument [Line Items]
Number of bonds retired | Bond		1	2
Average interest rate	3.75%
Collateral amount | $	$ 9.4

Debt (ADS Mexicana Scotia Bank

Debt (ADS Mexicana Scotia Bank Revolving Credit Facility ) - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 11, 2014	Mar. 31, 2017
Debt Instrument [Line Items]
Outstanding letters of credit		$ 10,600
ADS Mexicana [Member]
Debt Instrument [Line Items]
Outstanding letters of credit		1,500
ADS Mexicana [Member] | Scotia Bank Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit maturity date	Dec. 11, 2017
Current borrowing capacity	$ 5,000
Outstanding letters of credit		$ 1,000
ADS Mexicana [Member] | Scotia Bank Revolving Credit Facility [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest percentage		1.60%

Debt (Debt Covenants and Divide

Debt (Debt Covenants and Dividend Restrictions) - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)
Debt Instrument [Line Items]
Maximum capital distributions	$ 16,820,000	$ 16,240,000	$ 7,869,000
Debt Covenants [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maximum capital distributions	$ 50,000,000
Leverage ratio	4
Debt Covenants [Member] | Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio, minimum	3
Fixed charge coverage ratio	125.00%

Debt - Maturities of Long-term

Debt - Maturities of Long-term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Debt Disclosure [Abstract]
2,018	$ 37,789
2,019	285,145
2,020	25,935
2,021	960
2,022	532
Thereafter	0
Total	$ 350,361	$ 351,215

Debt (Fiscal Year 2016 Amendmen

Debt (Fiscal Year 2016 Amendments and Consents Related to the Secured Bank Loans and Senior Notes) - Additional Information (Detail) - $ / shares	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Debt Disclosure [Abstract]
Cash dividends declared per share	$ 0.06	$ 0.06	$ 0.0195

Debt (Fiscal Year 2017 Amendmen

Debt (Fiscal Year 2017 Amendments and Consents Related to the Secured Bank Term Loans and Senior Notes) - Additional Information (Detail) - $ / shares	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jul. 31, 2016	Jun. 30, 2016	Mar. 31, 2016
Debt Instrument [Line Items]
Cash dividends declared per share			$ 0.06		$ 0.06	$ 0.0195
Common Stock [Member]
Debt Instrument [Line Items]
Cash dividends declared per share		$ 0.06		$ 0.06
Preferred Stock [Member]
Debt Instrument [Line Items]
Cash dividends declared per share	$ 0.0195

Derivative Transactions - Summa

Derivative Transactions - Summary of Fair Values for Various Derivatives (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Diesel Fuel Option Collars and Swaps [Member] | Receivables [Member]
Derivatives, Fair Value [Line Items]
Asset	$ 149
Diesel Fuel Option Collars and Swaps [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset	30	$ 11
Diesel Fuel Option Collars and Swaps [Member] | Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
(Liability)	(122)	(2,609)
Diesel Fuel Option Collars and Swaps [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
(Liability)	$ (20)	(6)
Interest Rate Swaps [Member] | Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
(Liability)		(252)
Propylene Swaps [Member] | Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
(Liability)		$ (8,027)

Derivative Transactions - Sched

Derivative Transactions - Schedule of Cash Settlements and Net Losses and Net (Gains) on Mark-to-Market Adjustments for Changes in Fair Value of Derivative Contracts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Derivatives, Fair Value [Line Items]
Total net unrealized mark to market losses (gains)	$ (10,921)	$ 2,163	$ 7,746
Total net realized losses (gains)	8,564	14,734	7,705
Total realized and unrealized losses (gains) included in Derivative losses (gains) and other expense (income), net	(2,357)	16,897	15,451
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Total net unrealized mark to market losses (gains)	(252)	(513)	(236)
Foreign Exchange Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Total net unrealized mark to market losses (gains)		28	(28)
Total net realized losses (gains)		(150)	5,636
Diesel Fuel Option Collars [Member]
Derivatives, Fair Value [Line Items]
Total net unrealized mark to market losses (gains)	(2,642)	(237)	2,841
Total net realized losses (gains)	1,893	3,142	736
Propylene Swaps [Member]
Derivatives, Fair Value [Line Items]
Total net unrealized mark to market losses (gains)	(8,027)	2,885	5,169
Total net realized losses (gains)	$ 6,671	$ 11,742	$ 1,333

Derivative Transactions - Sch97

Derivative Transactions - Schedule of Cash Settlements and Net Losses and Net (Gains) on Mark-to-Market Adjustments for Changes in Fair Value of Derivative Contracts (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative losses (gains) and other expense (income), net	$ 5,970	$ (16,575)	$ (14,370)
Derivatives Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative losses (gains) and other expense (income), net	$ (3,600)	$ (300)	$ (1,100)

Commitments and Contingencies (

Commitments and Contingencies (Purchase Commitments) - Additional Information (Detail) - Inventory [Member] $ in Millions	12 Months Ended
	Mar. 31, 2017USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase contracts period range, start	1 month
Purchase contracts period range, end	12 months
Total purchase commitment	$ 18.1

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Average fair value of shares allocated under ESOP, per share	$ 16.58	$ 19.20	$ 16.61
Compensation expense related to allocation of ESOP shares	$ 9,600,000	$ 10,300,000	$ 12,100,000
ESOP directed to the Plan trustee	2,900,000	2,500,000
Defined contribution postretirement benefit plan, costs recognized	800,000	600,000	500,000
Profit-Sharing Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Contribution to the profit sharing plan	0	0	0
Other Liabilities [Member] | Executive Termination Payments [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Executive termination payment obligation	5,100,000	4,000,000
General and Administrative Expenses [Member] | Executive Termination Payments [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Compensation expense (benefit)	$ 1,100,000	$ (300,000)	$ 300,000
Redeemable Convertible Preferred Stock [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Fair value of shares allocated under ESOP, per share	$ 16.80	$ 16.35	$ 22.05
Employee stock ownership plan number of shares approved by the board of directors to the plan	600,000	500,000
Employee stock ownership plan allocated as shares	7,779,000	7,831,000
Redeemable Convertible Preferred Stock [Member] | Maximum [Member] | Dividend Declared [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee stock ownership plan allocated as shares	100,000	100,000
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

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Class of Stock [Line Items]
Purchase of common stock	0	0
Price of shares purchased subsequent to IPO			$ 17.21
Adjustments to redeemable common stock fair value measurement			$ 18,256
Paid-in capital	$ 755,787	$ 739,097
IPO [Member]
Class of Stock [Line Items]
Mandatorily redeemable obligation	18,200
Paid-in capital	$ 1,500
IPO [Member] | General and Administrative Expenses [Member]
Class of Stock [Line Items]
Stock-based compensation expense			1,000
Adjustments to redeemable common stock fair value measurement			$ (1,300)

Mezzanine Equity (Redeemable Co

Mezzanine Equity (Redeemable Common Stock) - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2014
Temporary Equity [Line Items]
Percentage of minority equity owners		15.00%
Redeemable Common Stock [Member]
Temporary Equity [Line Items]
Classified in permanent equity as a result of the IPO	$ 10.1
IPO [Member]
Temporary Equity [Line Items]
Major share holders equity securities amount		$ 50

Mezzanine Equity (Redeemable102

Mezzanine Equity (Redeemable Convertible Preferred Stock) - Additional Information (Detail) - Redeemable Convertible Preferred Stock [Member] - $ / shares	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Temporary Equity [Line Items]
Preferred stock conversion basis	convertible at a rate of 0.7692 shares of common stock for each share of Redeemable convertible preferred stock.
Preferred stock, issue price, per share	$ 0.781
Preferred stock, number of shares issuable upon conversion	0.7692
Redeemable convertible preferred stock, per share	$ 0.781
Preferred stock, dividend rate, percentage	2.50%	2.50%	2.50%
Annual dividend record date	Mar. 15, 2017	Mar. 15, 2016	Mar. 15, 2015
Dividend to be paid	Mar. 31, 2017

Mezzanine Equity - Schedule of

Mezzanine Equity - Schedule of Dividends Allocation (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2016	Jun. 30, 2016
Dividends Payable [Line Items]
Required dividend per share		$ 0.0195	$ 0.06	$ 0.06
Redeemable Convertible Preferred Stock [Member]
Dividends Payable [Line Items]
Total cash dividends	$ 1,512	$ 1,293
Total ESOP required dividends	$ 152	$ 153
Allocated shares	7,779	7,831
Required dividend per share	$ 0.0195	$ 0.0195
Redeemable Convertible Preferred Stock [Member] | Quarterly Cash Dividends [Member]
Dividends Payable [Line Items]
Total cash dividends	$ 1,494	$ 1,272
Redeemable Convertible Preferred Stock [Member] | Annual Cash Dividends [Member]
Dividends Payable [Line Items]
Total cash dividends	18	21
Dividend	$ 134	$ 132

Mezzanine Equity (Redeemable No

Mezzanine Equity (Redeemable Noncontrolling Interest in Subsidiaries ) - Additional Information (Detail) - BaySaver [Member]	Jul. 31, 2015	Jul. 17, 2015
Temporary Equity [Line Items]
Additionally acquired percentage of ownership in joint ventures	10.00%	10.00%
Percentage of voting interests acquired		65.00%

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-based Compensation Expense (Benefit) Recognized in Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	$ 8,307	$ (5,868)	$ 24,247
Cost of Goods Sold [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	177	(300)	1,100
Selling Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	177	(500)	1,500
General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	$ 7,953	$ (5,068)	$ 21,647

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock-based Compensation Expense (Benefit) by Award Type (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	$ 8,307	$ (5,868)	$ 24,247
Non-Employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	1,318		900
Liability-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	4,936	(6,784)	21,666
Equity-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	108
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense (benefit)	$ 1,945	$ 916	$ 1,681

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Estimate Fair Value of Stock Options Granted (Detail) - $ / shares	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock price			$ 17.21
Liability-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected stock price volatility, minimum	29.60%	31.10%	28.20%
Expected stock price volatility, maximum	33.00%	39.30%	51.00%
Risk-free interest rate, minimum	0.90%	0.50%	0.10%
Risk-free interest rate, maximum	1.90%	1.50%	1.80%
Dividend yield	0.90%	0.90%	0.50%
Liability-Classified Stock Options [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock price	$ 18.70	$ 18.34	$ 14.33
Weighted-average expected option life (years)	6 months	6 months	6 months
Liability-Classified Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock price	$ 28.17	$ 33.03	$ 29.94
Weighted-average expected option life (years)	5 years 1 month 6 days	6 years 2 months 12 days	7 years 2 months 12 days
Equity-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock price	$ 24.20
Expected stock price volatility, minimum	31.50%
Expected stock price volatility, maximum	35.60%
Risk-free interest rate, minimum	2.00%
Risk-free interest rate, maximum	2.20%
Dividend yield	1.00%
Equity-Classified Stock Options [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average expected option life (years)	4 years 10 months 25 days
Equity-Classified Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average expected option life (years)	6 years 1 month 6 days

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock Options) - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2017USD ($)Installment$ / sharesshares	Mar. 31, 2016USD ($)$ / sharesshares	Mar. 31, 2015USD ($)$ / sharesshares	May 31, 2014shares
Equity-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, weighted average service period for recognition	2 years 10 months 24 days
Weighted average fair value of options granted | $ / shares	$ 7.81	$ 0	$ 0
Intrinsic value of options vested	$ 100,000
Unrecognized compensation expense	$ 2,600,000
Options exercised | shares	0	0	0
Equity-Classified Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of options vested		$ 100,000	$ 100,000
2000 Stock Option Plan [Member] | Liability-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based awards, unrecognized compensation expense	$ 300,000
Unrecognized compensation cost, weighted average service period for recognition	1 year 3 months 18 days
Fair value of options vested	$ 0	0	$ 8,100,000
Weighted average fair value of options granted | $ / shares	$ 0		$ 6.76
Aggregate intrinsic value of options outstanding	$ 1,700,000
Aggregate intrinsic value of options exercisable	1,300,000
Intrinsic value of options exercised	$ 3,700,000	3,700,000	$ 3,400,000
Options exercised | shares	292,000
2000 Stock Option Plan [Member] | Liability-Classified Stock Options [Member] | Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, expiration period	10 years
Stock awards, number of annual installments for vesting | Installment	3
Stock based awards, shares available for grant | shares	1,100,000
2013 Stock Option Plan [Member] | Liability-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based awards, shares available for grant | shares	1,000,000
Stock-based awards, unrecognized compensation expense	$ 3,600,000
Unrecognized compensation cost, weighted average service period for recognition	1 year 1 month 6 days
Aggregate intrinsic value of options outstanding	$ 14,400,000
Aggregate intrinsic value of options exercisable	9,300,000
Intrinsic value of options exercised	800,000
Stock-based awards, number of shares authorized for grant | shares				1,400,000
Intrinsic value of options vested	$ 3,400,000	$ 3,600,000	$ 7,200,000
Options exercised | shares	66,000
2013 Stock Option Plan [Member] | Liability-Classified Stock Options [Member] | Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, expiration period	10 years
Stock awards, number of annual installments for vesting | Installment	5
2013 Stock Option Plan [Member] | Liability-Classified Stock Options [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, expiration period	10 years
Stock-based awards, vesting period	4 years

Stock-Based Compensation - S109

Stock-Based Compensation - Schedule of Stock Option Activity (Detail) - $ / shares	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Equity-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Granted	514,000
Number of Shares, Exercised	0	0	0
Number of Shares, Outstanding, Ending Balance	514,000
Number of Shares, Vested at end of year	15,000
Number of Shares, Unvested at end of year	499,000
Weighted Average Exercise Price, Granted	$ 24.20
Weighted Average Exercise Price, Outstanding, Ending Balance	24.20
Weighted Average Exercise Price, Vested at end of period	24.20
Weighted Average Exercise Price, Unvested at end of year	24.20
Weighted Average Exercise Price, Fair value of options granted during the year	$ 7.81
Weighted Average Remaining Contractual Term (in years), Outstanding	9 years
Weighted Average Remaining Contractual Term (in years), Vested at end of year	9 years
Weighted Average Remaining Contractual Term (in years), Unvested at end of year	9 years
2000 Stock Option Plan [Member] | Liability-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding, Beginning Balance	515,000
Number of Shares, Granted	0
Number of Shares, Exercised	(292,000)
Number of Shares, Forfeited	(28,000)
Number of Shares, Outstanding, Ending Balance	195,000	515,000
Number of Shares, Vested at end of year	136,000
Number of Shares, Unvested at end of year	59,000	76,000
Number of Shares, Vested and expected to vest at end of year	0
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 11.82
Weighted Average Exercise Price, Granted	0
Weighted Average Exercise Price, Exercised	10.63
Weighted Average Exercise Price, Forfeited	12.50
Weighted Average Exercise Price, Outstanding, Ending Balance	13.31	$ 11.82
Weighted Average Exercise Price, Vested at end of period	12.26
Weighted Average Exercise Price, Unvested at end of year	15.74
Weighted Average Exercise Price, Fair value of options granted during the year	$ 0
Weighted Average Remaining Contractual Term (in years), Outstanding	5 years 4 months 24 days	4 years 2 months 12 days
Weighted Average Remaining Contractual Term (in years), Vested at end of year	4 years 8 months 12 days
Weighted Average Remaining Contractual Term (in years), Unvested at end of year	7 years
2013 Stock Option Plan [Member] | Liability-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding, Beginning Balance	1,911,000
Number of Shares, Granted	0
Number of Shares, Exercised	(66,000)
Number of Shares, Forfeited	(99,000)
Number of Shares, Outstanding, Ending Balance	1,746,000	1,911,000
Number of Shares, Vested at end of year	1,125,000
Number of Shares, Unvested at end of year	621,000	1,095,000
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 13.64
Weighted Average Exercise Price, Granted	0
Weighted Average Exercise Price, Exercised	13.64
Weighted Average Exercise Price, Forfeited	13.64
Weighted Average Exercise Price, Outstanding, Ending Balance	13.64	$ 13.64
Weighted Average Exercise Price, Vested at end of period	13.64
Weighted Average Exercise Price, Unvested at end of year	13.64
Weighted Average Exercise Price, Fair value of options granted during the year	$ 0
Weighted Average Remaining Contractual Term (in years), Outstanding	6 years	7 years 4 months 24 days
Weighted Average Remaining Contractual Term (in years), Vested at end of year	6 years
Weighted Average Remaining Contractual Term (in years), Unvested at end of year	6 years

Stock-Based Compensation - S110

Stock-Based Compensation - Summary of Unvested Stock Option Grants (Detail) - $ / shares shares in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Equity-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Granted	514
Number of Shares, Vested	(15)
Number of Shares, Unvested at end of year	499
Weighted Average Grant Date Fair Value, Granted	$ 7.81	$ 0	$ 0
Weighted Average Grant Date Fair Value, Vested	6.72
Weighted Average Grant Date Fair Value, Unvested at end of year	$ 7.84
2000 Stock Option Plan [Member] | Liability-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Unvested at beginning of year	76
Number of Shares, Granted	0
Number of Shares, Forfeitures	(17)
Number of Shares, Unvested at end of year	59	76
Weighted Average Grant Date Fair Value, Unvested at beginning of year	$ 6.76
Weighted Average Grant Date Fair Value, Granted	0		$ 6.76
Weighted Average Grant Date Fair Value, Forfeitures	6.76
Weighted Average Grant Date Fair Value, Unvested at end of year	$ 6.76	$ 6.76
Number of Shares, Forfeitures	17
2013 Stock Option Plan [Member] | Liability-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Unvested at beginning of year	1,095
Number of Shares, Granted	0
Number of Shares, Vested	(375)
Number of Shares, Forfeitures	(99)
Number of Shares, Unvested at end of year	621	1,095
Weighted Average Grant Date Fair Value, Unvested at beginning of year	$ 6.22
Weighted Average Grant Date Fair Value, Forfeitures	6.22
Weighted Average Grant Date Fair Value, Unvested at end of year	$ 6.22	$ 6.22
Number of Shares, Forfeitures	99
Non Employee Director Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Granted	77
Number of Shares, Vested	(37)
Number of Shares, Unvested at end of year	40
Weighted Average Grant Date Fair Value, Granted	$ 24.20
Weighted Average Grant Date Fair Value, Vested	24.20
Weighted Average Grant Date Fair Value, Unvested at end of year	$ 24.20

Stock-Based Compensation (Restr

Stock-Based Compensation (Restricted Stock) - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Paid-in capital	$ 755,787	$ 739,097
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based awards, vesting period	5 years
Paid-in capital	$ 4,800
Stock based awards, shares available for grant	0.2
Unrecognized compensation expense	$ 3,500
Unrecognized compensation cost, weighted average service period for recognition	2 years 4 months 24 days
Weighted average fair value of options granted	$ 24.20
Intrinsic value of options vested	$ 1,200	$ 1,100	$ 1,900

Stock-Based Compensation - S112

Stock-Based Compensation - Summary of Unvested Restricted Stock Grants (Detail) - Restricted Stock [Member] shares in Thousands	12 Months Ended
	Mar. 31, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Unvested at beginning of year | shares	112
Number of shares, Granted | shares	191
Number of Shares, Vested | shares	(49)
Number of Shares, Unvested at end of year | shares	254
Weighted Average Grant Date Fair Value, Unvested at beginning of year | $ / shares	$ 12.65
Weighted Average Grant Date Fair Value, Granted | $ / shares	24.20
Weighted Average Grant Date Fair Value, Vested | $ / shares	16.15
Weighted Average Grant Date Fair Value, Unvested at end of year | $ / shares	$ 21.92

Stock-Based Compensation (Non-E

Stock-Based Compensation (Non-Employee Director Compensation) - Additional Information (Detail) - Non Employee Director Compensation Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jun. 18, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based awards, number of shares authorized for grant			300,000
Stock-based awards, vesting period from the date of issuance	1 year
Shares available for grant	200,000	200,000
Unrecognized compensation expense	$ 0.5
Unrecognized compensation cost, weighted average service period for recognition	7 months 6 days

Income Taxes - Income Before In

Income Taxes - Income Before Income Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
United States	$ 59,543	$ 45,159	$ (4,381)
Foreign	5,288	14,140	9,304
Income before income taxes	$ 64,831	$ 59,299	$ 4,923

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Current:
Federal	$ 24,318	$ 6,889	$ 20,592
State and local	4,652	2,126	3,655
Foreign	3,040	3,791	831
Total current tax expense	32,010	12,806	25,078
Deferred:
Federal	(5,887)	10,019	(16,270)
State and local	(1,297)	1,431	(2,626)
Foreign	(211)	(758)	102
Total deferred tax expense (benefit)	(7,395)	10,692	(18,794)
Total Income tax expense	$ 24,615	$ 23,498	$ 6,284

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Effective Tax Rate and Statutory Federal Income Tax Rate (Detail)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Redeemable convertible preferred stock dividend	(0.80%)	(0.80%)	(3.80%)
ESOP stock appreciation	4.90%	5.80%	82.30%
ESOP compensation for Special Dividend on unallocated shares			0.20%
Effect of tax rate of foreign subsidiaries	1.30%	0.80%	(9.30%)
State and local taxes—net of federal income tax benefit	4.10%	4.30%	19.70%
Stock-based compensation	0.30%	(1.80%)	64.70%
Uncertain tax position change	(1.10%)	(3.60%)	(35.20%)
Qualified production activity credit	(3.30%)	(0.90%)	(37.10%)
Executive repurchase agreement			7.20%
Closure of Puerto Rico	(4.20%)
Other	1.80%	0.80%	3.90%
Effective rate	38.00%	39.60%	127.60%

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Deferred tax assets:
State income taxes	$ 1,474	$ 1,927
ESOP loan repayment	1,363	1,390
Receivable and other allowances	2,660	2,150
Derivatives	(15)	4,397
Inventory	5,820	1,433
Non-qualified stock options	6,052	4,309
Executive termination payments (Note 15)	2,044	1,852
Accrued Expenses	411	1,378
Worker’s compensation	1,323	1,390
Contingent consideration	91	533
Foreign net operating losses	2,223	1,507
Other	2,856	2,491
Total deferred tax assets	26,302	24,757
Less: valuation allowance	(2,223)	(1,507)
Total net deferred tax assets	24,079	23,250
Deferred tax liabilities:
Intangible assets	7,214	8,882
Property, plant and equipment	51,599	52,115
Leases	724	6,059
Capitalized software costs	3,200	2,935
Goodwill	3,886	3,643
Other	761	1,867
Total deferred tax liabilities	67,384	75,501
Net deferred tax liability	$ 43,305	$ 52,251

Income Taxes - Net Deferred Tax

Income Taxes - Net Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Net current deferred tax assets		$ 11,701
Net non-current deferred tax assets	$ 702
Net non-current deferred tax liabilities	$ 44,007	$ 63,952

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Undistributed earnings of foreign subsidiaries	$ 28,000
Unrecognized tax benefit that would decrease income tax expense	6,196	$ 7,998	$ 10,452	$ 12,855
Decrease in unrecognized tax benefit related to income tax expense	6,200
Accrued interest and penalties related to unrecognized tax benefits	$ 1,800	$ 2,700

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Balance as beginning of year	$ 7,998	$ 10,452	$ 12,855
Tax positions taken in current year	0	917
Decreases in tax positions for prior years	(1,786)	(599)	(672)
Increases in tax positions for prior years	80	358	336
Settlements	0	0	0
Lapse of statute of limitations	(96)	(3,130)	(2,067)
Balance at end of year	$ 6,196	$ 7,998	$ 10,452

Net Income (Loss) Per Share - S

Net Income (Loss) Per Share - Summary of Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
NET INCOME (LOSS) PER SHARE — BASIC:
Net income (loss) attributable to ADS	$ (18,110)	$ 9,053	$ 23,734	$ 18,273	$ (12,119)	$ 13,131	$ 12,346	$ 11,694	$ 32,950	$ 25,052	$ (7,827)
Change in fair value of redeemable convertible preferred stock											(11,054)
Accretion of redeemable noncontrolling interest in subsidiaries									(1,560)	(932)
Dividends paid to redeemable convertible preferred stockholders									(1,646)	(1,425)	(661)
Dividends paid to unvested restricted stockholders									(73)	(24)	(11)
Net income (loss) available to common stockholders and participating securities									29,671	22,671	(19,553)
Undistributed income allocated to participating securities									(1,700)	(1,270)
Net income (loss) available to common stockholders									$ 27,971	$ 21,401	$ (19,553)
Weighted average number of common shares outstanding — Basic									54,919	53,978	51,344
Net income (loss) per common share — Basic	$ (0.34)	$ 0.14	$ 0.38	$ 0.29	$ (0.24)	$ 0.21	$ 0.20	$ 0.19	$ 0.51	$ 0.40	$ (0.38)
NET INCOME (LOSS) PER SHARE — DILUTED:
Net income (loss) available to common stockholders — Diluted									$ 27,971	$ 21,401	$ (19,553)
Weighted average number of common shares outstanding — Basic									54,919	53,978	51,344
Assumed exercise of stock options									705	1,198
Weighted average number of common shares outstanding — Diluted									55,624	55,176	51,344
Net income (loss) per common share — Diluted	$ (0.34)	$ 0.14	$ 0.38	$ 0.29	$ (0.24)	$ 0.21	$ 0.19	$ 0.19	$ 0.50	$ 0.39	$ (0.38)
Potentially dilutive securities excluded as anti- dilutive									6,228	6,383	5,395

Business Segment Information -

Business Segment Information - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2017Segment
Segment Reporting [Abstract]
Number of reportable segments	2
Number of operating segments	2

Business Segment Information123

Business Segment Information - Schedule of Revenue from Reportable Segments by Product Type (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Total net sales	$ 244,184	$ 294,716	$ 360,785	$ 357,576	$ 245,398	$ 312,827	$ 383,329	$ 349,124	$ 1,257,261	$ 1,290,678	$ 1,180,073
Domestic [Member]
Segment Reporting Information [Line Items]
Total net sales									1,102,236	1,113,796	1,027,933
Domestic [Member] | Pipe [Member]
Segment Reporting Information [Line Items]
Total net sales									786,546	812,071	771,214
Domestic [Member] | Allied Products [Member]
Segment Reporting Information [Line Items]
Total net sales									315,690	301,725	256,719
International Segment [Member]
Segment Reporting Information [Line Items]
Total net sales									155,025	176,882	152,140
International Segment [Member] | Pipe [Member]
Segment Reporting Information [Line Items]
Total net sales									122,384	139,731	125,407
International Segment [Member] | Allied Products [Member]
Segment Reporting Information [Line Items]
Total net sales									$ 32,641	$ 37,151	$ 26,733

Business Segment Information124

Business Segment Information - Schedule of Additional Financial Information Attributable to Reportable Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	$ 193,371	$ 187,340	$ 143,877
Interest expense	17,467	18,460	19,368
Income tax expense	24,615	23,498	6,284
Depreciation and amortization	72,355	71,009	65,472
Equity in net (loss) income of unconsolidated affiliates	(4,308)	(5,234)	(2,335)
Capital expenditures	46,676	44,942	32,080
Investments in unconsolidated affiliates	8,986	13,188
Total identifiable assets	1,046,285	1,037,316
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total identifiable assets	(5,708)	(59,784)
Domestic [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	175,676	162,875	128,973
Interest expense	17,049	17,908	19,308
Income tax expense	21,786	20,465	5,351
Depreciation and amortization	63,747	62,625	59,397
Equity in net (loss) income of unconsolidated affiliates	(505)	181	289
Capital expenditures	39,642	37,242	29,345
Investments in unconsolidated affiliates	2,427	2,932
Total identifiable assets	917,006	949,286
International Segment [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	17,695	24,465	14,904
Interest expense	418	552	60
Income tax expense	2,829	3,033	933
Depreciation and amortization	8,608	8,384	6,075
Equity in net (loss) income of unconsolidated affiliates	(3,803)	(5,415)	(2,624)
Capital expenditures	7,034	7,700	$ 2,735
Investments in unconsolidated affiliates	6,559	10,256
Total identifiable assets	$ 134,987	$ 147,814

Business Segment Information125

Business Segment Information - Schedule of Reconciliation of Segment Adjusted EBITDA to Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net income (loss)	$ (18,110)	$ 9,053	$ 23,734	$ 18,273	$ (12,119)	$ 13,131	$ 12,346	$ 11,694	$ 32,950	$ 25,052	$ (7,827)
Interest expense									17,467	18,460	19,368
Income tax expense									24,615	23,498	6,284
Fair market value adjustments to derivatives									(10,921)	2,163	7,746
Loss (gain) on sale of business or disposal of assets									8,509	812	362
Stock-based compensation expense (benefit)									8,307	(5,868)	24,247
ESOP deferred stock-based compensation									9,600	10,300	12,100
Gain on bargain purchase of PTI acquisition									(609)
Domestic [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net income (loss)									35,118	24,875	(9,443)
Depreciation and amortization									63,747	62,625	59,397
Interest expense									17,049	17,908	19,308
Income tax expense									21,786	20,465	5,351
Segment EBITDA									137,700	125,873	74,613
Fair market value adjustments to derivatives									(10,921)	2,139	7,774
Foreign currency transaction (gains) losses											5,636
Loss (gain) on sale of business or disposal of assets									4,793	892	257
Unconsolidated affiliates interest, taxes, depreciation and amortization									1,088	1,052	1,341
Contingent consideration remeasurement									(265)	371	174
Stock-based compensation expense (benefit)									8,307	(5,868)	24,247
ESOP deferred stock-based compensation									9,568	10,250	12,144
Expense (benefit) related to executive termination payments									1,092	(294)	328
Expense related to executive stock repurchase agreements											1,011
Loss related to BaySaver step acquisition										490
Inventory step up related to PTI acquisition									(525)
Gain on bargain purchase of PTI acquisition									(609)
Restatement costs									(24,026)	(27,970)
Transaction costs									372		1,448
Segment Adjusted EBITDA									175,676	162,875	128,973
International Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net income (loss)									790	5,692	5,747
Depreciation and amortization									8,608	8,384	6,075
Interest expense									418	552	60
Income tax expense									2,829	3,033	933
Segment EBITDA									12,645	17,661	12,815
Fair market value adjustments to derivatives										24	(28)
Foreign currency transaction (gains) losses									(1,629)	697	(232)
Loss (gain) on sale of business or disposal of assets									3,716	(80)	105
Unconsolidated affiliates interest, taxes, depreciation and amortization									1,663	2,163	2,244
Impairment on investment in unconsolidated affiliate									1,300	4,000
Segment Adjusted EBITDA									$ 17,695	$ 24,465	$ 14,904

Business Segment Information126

Business Segment Information - Net Sales and Long-Lived Asset by Geographic Location (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 244,184	$ 294,716	$ 360,785	$ 357,576	$ 245,398	$ 312,827	$ 383,329	$ 349,124	$ 1,257,261	$ 1,290,678	$ 1,180,073
Long-lived Assets	418,311				405,972				418,311	405,972
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,243,074	1,274,700	1,161,909
Long-lived Assets	411,752				395,716				411,752	395,716
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									14,187	15,978	$ 18,164
Long-lived Assets	$ 6,559				$ 10,256				$ 6,559	$ 10,256

Supplemental Disclosures of 127

Supplemental Disclosures of Cash Flow Information - Increase (Decrease) in Cash Due to Changes Working Capital (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Receivables	$ 15,055	$ (37,788)	$ (10,351)
Inventories	(27,917)	28,330	(7,663)
Prepaid expenses and other current assets	(2,548)	646	1,953
Accounts payable, accrued expenses, and other liabilities	6,851	10,156	(767)
Total	$ (8,559)	$ 1,344	$ (16,828)

Supplemental Disclosures of 128

Supplemental Disclosures of Cash Flow Information - Supplemental Disclosures Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Other Significant Noncash Transactions [Line Items]
Interest	$ 17,273	$ 18,352	$ 18,709
Income taxes	13,525	32,175	28,503
Redeemable convertible preferred stock dividend	134	132	127
Redemption of common stock to exercise stock options			93
Purchases of plant, property, and equipment included in accounts payable	2,549	1,165	124
ESOP distributions in common stock	7,425	10,250	6,133
Assets acquired and obligation incurred under capital lease	26,276	34,207	24,047
Lease obligation retired upon disposition of leased assets	390	134	779
Reclassification of liability-classified stock options and restricted stock to equity	4,147	3,702	12,141
Reclassification of stock repurchase agreement liability and mezzanine equity to equity			19,729
Payable recorded for business acquisition	$ 950
Reclassification of deferred public offering cost asset upon initial public offering			456
Miscellaneous [Member]
Other Significant Noncash Transactions [Line Items]
Receivable recorded for sale of businesses		$ 150	$ 600

Quarterly Financial Informat129

Quarterly Financial Information - Summary of Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 244,184	$ 294,716	$ 360,785	$ 357,576	$ 245,398	$ 312,827	$ 383,329	$ 349,124	$ 1,257,261	$ 1,290,678	$ 1,180,073
Gross profit	39,251	69,441	90,512	96,606	49,504	74,842	86,529	74,477	295,810	285,352	205,113
Net (loss) income	(18,052)	10,258	24,281	19,421	(11,085)	12,942	15,928	12,782	35,908	30,567	(3,696)
Net income (loss) attributable to ADS	$ (18,110)	$ 9,053	$ 23,734	$ 18,273	$ (12,119)	$ 13,131	$ 12,346	$ 11,694	$ 32,950	$ 25,052	$ (7,827)
Net (loss) income per share
Basic	$ (0.34)	$ 0.14	$ 0.38	$ 0.29	$ (0.24)	$ 0.21	$ 0.20	$ 0.19	$ 0.51	$ 0.40	$ (0.38)
Diluted	$ (0.34)	$ 0.14	$ 0.38	$ 0.29	$ (0.24)	$ 0.21	$ 0.19	$ 0.19	$ 0.50	$ 0.39	$ (0.38)

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - $ / shares	12 Months Ended
	Mar. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jul. 31, 2016	Jun. 30, 2016	Mar. 31, 2016
Subsequent Event [Line Items]
Cash dividend declared				$ 0.06		$ 0.06	$ 0.0195
First Quarter [Member]
Subsequent Event [Line Items]
Dividend payable date	Jun. 15, 2017
Dividend payable, date of record	Jun. 5, 2017
Common Stock [Member]
Subsequent Event [Line Items]
Cash dividend declared			$ 0.06		$ 0.06
Common Stock [Member] | Scenario, Forecast [Member]
Subsequent Event [Line Items]
Cash dividend declared		$ 0.07

Schedule II - Consolidated V131

Schedule II - Consolidated Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Valuation And Qualifying Accounts [Abstract]
Balance at beginning of period	$ 7,956	$ 5,423	$ 4,490
Charged to costs and expenses	2,940	3,542	1,914
Charged to other accounts	(13)	(81)	(291)
Deductions	(452)	(928)	(690)
Balance at end of period	$ 10,431	$ 7,956	$ 5,423