10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number: 001-36557

ADVANCED DRAINAGE SYSTEMS, INC.

(Exact name of registrant as specified in its charter)

Delaware	51-0105665
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

4640 Trueman Boulevard, Hilliard, Ohio 43026

(Address of Principal Executive Offices, Including Zip Code)

(614) 658-0050

(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.01 par value per share	WMS	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer	☒	Accelerated Filer	☐
Non-Accelerated Filer	☐	Smaller Reporting Company	☐
Emerging Growth Company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

As of November 5, 2019, the registrant had 68,272,550 shares of common stock outstanding. The shares of common stock trade on the New York Stock Exchange under the ticker symbol “WMS.” In addition, as of November 5, 2019, 303,257 shares of unvested restricted common stock were outstanding and 22,382,004 shares of ESOP, preferred stock, convertible into 17,216,237 shares of common stock, were outstanding. As of November 5, 2019, 85,792,044 shares of common stock were outstanding, inclusive of outstanding shares of unvested restricted common stock and on an as-converted basis with respect to the outstanding shares of ESOP preferred stock.

TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION
Item 1.	Condensed Consolidated Financial Statements (Unaudited)	Page
	Condensed Consolidated Balance Sheets as of September 30, 2019 and March 31, 2019	1
	Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2019 and 2018	2
	Condensed Consolidated Statements of Comprehensive Income (loss) for the three and six months ended September 30, 2019 and 2018	3
	Condensed Consolidated Statements of Cash Flows for the six months ended September 30, 2019 and 2018	4
	Condensed Consolidated Statements of Stockholders’ Equity and Mezzanine Equity for the three and six months ended September 30, 2019 and 2018	5
	Notes to the Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	47
Item 4.	Controls and Procedures	48
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	49
Item 1A.	Risk Factors	49
Item 2.	Unregistered Sale of Equity Securities	54
Item 3.	Defaults Upon Senior Securities	54
Item 4.	Mine Safety Disclosures	54
Item 5.	Other Information	54
Item 6.	Exhibits	55
Signatures		56

i

PART I. FINANCIAL INFORMATION

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited) (In thousands, except par value)

	September 30, 2019			March 31, 2019
ASSETS
Current assets:
Cash	$	54,207		$	8,891
Receivables (less allowance for doubtful accounts of $5,939 and    $7,653, respectively)		250,470			186,991
Inventories		248,914			264,540
Other current assets		10,629			6,091
Total current assets		564,220			466,513
Property, plant and equipment, net		492,017			398,891
Other assets:
Goodwill		669,753			102,638
Intangible assets, net		501,572			37,177
Other assets		67,758			36,940
Total assets	$	2,295,320		$	1,042,159
LIABILITIES, MEZZANINE EQUITY AND STOCKHOLDERS’ EQUITY
Current liabilities:
Current maturities of debt obligations	$	6,195		$	25,932
Current maturities of finance lease obligations		22,555			23,117
Accounts payable		111,450			93,577
Other accrued liabilities		97,979			61,901
Accrued income taxes		3,169			1,758
Total current liabilities		241,348			206,285
Long-term debt obligations (less unamortized debt issuance costs of $2,614 and $2,293,    respectively)		1,043,154			208,602
Long-term finance lease obligations		52,746			61,555
Deferred tax liabilities		158,079			45,963
Other liabilities		37,017			19,119
Total liabilities		1,532,344			541,524
Commitments and contingencies (see Note 12)
Mezzanine equity:
Redeemable convertible preferred stock: $0.01 par value; 47,070 shares authorized;    44,170 shares issued; 22,383 and 22,611 shares outstanding, respectively		279,785			282,638
Deferred compensation – unearned ESOP shares		(28,565	)		(180,316	)
Total mezzanine equity		251,220			102,322
Stockholders’ equity:
Common stock; $0.01 par value: 1,000,000 shares authorized; 68,746 and 57,964    shares issued, respectively; 68,262 and 57,490 shares outstanding, respectively		11,545			11,436
Paid-in capital		800,947			391,039
Common stock in treasury, at cost		(10,162	)		(9,863	)
Accumulated other comprehensive loss		(26,427	)		(25,867	)
Retained (deficit) earnings		(277,725	)		17,582
Total ADS stockholders’ equity		498,178			384,327
Noncontrolling interest in subsidiaries		13,578			13,986
Total stockholders’ equity		511,756			398,313
Total liabilities, mezzanine equity and stockholders’ equity	$	2,295,320		$	1,042,159

See accompanying Notes to Condensed Consolidated Financial Statements.

- 1 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited) (In thousands, except per share data)

	Three Months Ended September 30,					Six Months Ended September 30,
	2019			2018		2019			2018
Net sales	$	495,905		$	406,555	$	909,613		$	794,402
Cost of goods sold		349,381			311,182		656,637			599,338
Cost of goods sold - ESOP special dividend compensation		—			—		168,610			—
Gross profit		146,524			95,373		84,366			195,064
Operating expenses:
Selling		29,971			24,731		56,336			48,896
General and administrative		48,030			21,584		79,463			42,966
Selling, general and administrative - ESOP special dividend compensation		—			—		78,142			—
Loss on disposal of assets and costs from exit and    disposal activities		2,004			324		2,711			1,428
Intangible amortization		9,300			1,985		10,842			3,969
Income (loss) from operations		57,219			46,749		(143,128	)		97,805
Other expense:
Interest expense		52,332			4,531		57,596			8,333
Derivative loss (gains) and other expense (income), net		175			94		79			(720	)
Income (loss) before income taxes		4,712			42,124		(200,803	)		90,192
Income tax (benefit) expense		(3,547	)		12,194		18,823			26,478
Equity in net (income) loss of unconsolidated affiliates		(203	)		558		(637	)		691
Net income (loss)		8,462			29,372		(218,989	)		63,023
Less: net income (loss) attributable to noncontrolling interest		873			702		(222	)		2,073
Net income (loss) attributable to ADS		7,589			28,670		(218,767	)		60,950
Weighted average common shares outstanding:
Basic		60,222			56,929		58,906			56,776
Diluted		60,876			57,558		58,906			57,374
Net income (loss) per share:
Basic	$	0.10		$	0.45	$	(3.86	)	$	0.97
Diluted	$	0.10		$	0.45	$	(3.86	)	$	0.96

See accompanying Notes to Condensed Consolidated Financial Statements.

- 2 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(Unaudited) (In thousands)

	Three Months Ended September 30,					Six Months Ended September 30,
	2019			2018		2019			2018
Net income (loss)	$	8,462		$	29,372	$	(218,989	)	$	63,023
Currency translation (loss) gain		(2,310	)		2,837		(746	)		(1,975	)
Comprehensive income (loss)		6,152			32,209		(219,735	)		61,048
Less: other comprehensive (loss) income attributable to    noncontrolling interest		(353	)		996		(186	)		(379	)
Less: net income (loss) attributable to noncontrolling interest		873			702		(222	)		2,073
Total comprehensive income (loss) attributable to ADS	$	5,632		$	30,511	$	(219,327	)	$	59,354

See accompanying Notes to Condensed Consolidated Financial Statements.

- 3 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited) (In thousands)

	Six Months Ended September 30,
	2019			2018
Cash Flows from Operating Activities
Net (loss) income	$	(218,989	)	$	63,023
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization		43,260			35,363
Deferred income taxes		1,127			3,221
Loss on disposal of assets and costs from exit and disposal activities		2,711			1,428
ESOP and stock-based compensation		16,082			11,760
ESOP special dividend compensation		246,752			—
Amortization of deferred financing charges		34,285			387
Inventory step up related to Infiltrator Water Technologies acquisition		5,773			—
Fair market value adjustments to derivatives		996			(901	)
Equity in net (income) loss of unconsolidated affiliates		(637	)		691
Other operating activities		(3,635	)		(1,342	)
Changes in working capital:
Receivables		(44,883	)		(64,649	)
Inventories		57,316			16,378
Prepaid expenses and other current assets		(2,917	)		(2,116	)
Accounts payable, accrued expenses, and other liabilities		34,470			(5,082	)
Net cash provided by operating activities		171,711			58,161
Cash Flows from Investing Activities
Capital expenditures		(25,622	)		(19,299	)
Acquisition of Infiltrator Water Technologies, net of cash acquired		(1,088,617	)		—
Other investing activities		(116	)		429
Net cash used in investing activities		(1,114,355	)		(18,870	)
Cash Flows from Financing Activities
Proceeds from Term Loan Facility		1,300,000			—
Payments on Term Loan Facility		(1,300,000	)		—
Proceeds from syndication of Term Loan Facility		700,000			—
Proceeds from Senior Notes		350,000			—
Proceeds from Revolving Credit Agreement		177,900			—
Payments on Revolving Credit Agreement		(177,900	)		—
Debt issuance costs		(34,606	)		—
Proceeds from PNC Credit Agreement		253,900			250,100
Payments on PNC Credit Agreement		(388,300	)		(243,400	)
Payments on Prudential Senior Notes		(100,000	)		(25,000	)
Payments on finance lease obligations		(12,375	)		(11,619	)
Proceeds from common stock offering, net of offering costs		293,648			—
Cash dividends paid		(76,324	)		(11,618	)
Proceeds from exercise of stock options		2,430			3,473
Other financing activities		(236	)		(1,026	)
Net cash provided by (used in) financing activities		988,137			(39,090	)
Effect of exchange rate changes on cash		(177	)		(176	)
Net change in cash		45,316			25
Cash at beginning of period		8,891			17,587
Cash at end of period	$	54,207		$	17,612
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for income taxes	$	7,199		$	18,331
Cash paid for interest		17,771			8,032
Non-cash operating, investing and financing activities:
Balance in accounts payable for the acquisition of property, plant and equipment		3,669			3,152

See accompanying Notes to Condensed Consolidated Financial Statements.

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ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY AND MEZZANINE EQUITY

(Unaudited) (In thousands)

	Common Stock				Paid -In		Common Stock in Treasury					Accumulated Other Compre-hensive			Retained (Deficit)			Total ADS Stockholders’			Non- controlling Interest in			Total Stock- holders’			Redeemable Convertible Preferred Stock						Deferred Compensation Unearned ESOP Shares						Redeemable Non-controlling Interest in			Total Mezzanine
	Shares		Amount		Capital		Shares		Amount			Loss			Earnings			Equity			Subsidiaries			Equity			Shares			Amount			Shares			Amount			Subsidiaries			Equity
Balance at July 1, 2018		57,366	$	11,431	$	375,215		441	$	(9,033	)	$	(24,684	)	$	(11,976	)	$	340,953		$	15,586		$	356,539			22,987		$	287,337			15,027		$	(187,772	)	$	8,474		$	108,039
Net income		—		—		—		—		—			—			28,670			28,670			208			28,878			—			—			—			—			494			494
Other comprehensive income		—		—		—		—		—			1,841			—			1,841			996			2,837			—			—			—			—			—			—
Redeemable convertible    preferred stock dividends		—		—		—		—		—			—			(478	)		(478	)		—			(478	)		—			—			—			—			—			—
Common stock dividends    ($0.08 per share)		—		—		—		—		—			—			(4,585	)		(4,585	)		—			(4,585	)		—			—			—			—			—			—
Allocation of ESOP shares to    participants for compensation		—		—		1,972		—		—			—			—			1,972			—			1,972			—			—			(191	)		2,396			—			2,396
Exercise of common stock options		25		—		258		—		—			—			—			258			—			258			—			—			—			—			—			—
Restricted stock awards		—		—		—		—		(2	)		—			—			(2	)		—			(2	)		—			—			—			—			—			—
Stock-based    compensation expense		—		—		1,812		—		—			—			—			1,812			—			1,812			—			—			—			—			—			—
ESOP distribution in common stock		134		2		2,218		—		—			—			—			2,220			—			2,220			(177	)		(2,220	)		—			—			—			(2,220	)
Balance at September 30, 2018		57,525	$	11,433	$	381,475		441	$	(9,035	)	$	(22,843	)	$	11,631		$	372,661		$	16,790		$	389,451			22,810		$	285,117			14,836		$	(185,376	)	$	8,968		$	108,709
Balance at April 1, 2018		56,889	$	11,426	$	364,908		413	$	(8,277	)	$	(21,247	)	$	(39,214	)	$	307,596		$	16,663		$	324,259			23,300		$	291,247			15,219		$	(190,168	)	$	8,471		$	109,550
Net income		—		—		—		—		—			—			60,950			60,950			1,241			62,191			—			—			—			—			832			832
Other comprehensive income		—		—		—		—		—			(1,596	)		—			(1,596	)		(379	)		(1,975	)		—			—			—			—			—			—
Redeemable convertible    preferred stock dividends		—		—		—		—		—			—			(975	)		(975	)		—			(975	)		—			—			—			—			—			—
Common stock dividends    ($0.16 per share)		—		—		—		—		—			—			(9,130	)		(9,130	)		—			(9,130	)		—			—			—			—			—			—
Dividend paid to non-controlling interest holder		—		—		—		—		—			—			—			—			(735	)		(735	)		—			—			—			—			(335	)		(335	)
Allocation of ESOP shares to    participants for compensation		—		—		3,597		—		—			—			—			3,597			—			3,597			—			—			(383	)		4,792			—			4,792
Exercise of common stock options		242		2		3,473		26		(704	)		—			—			2,771			—			2,771			—			—			—			—			—			—
Restricted stock awards		19		1		—		2		(54	)		—			—			(53	)		—			(53	)		—			—			—			—			—			—
Stock-based    compensation expense		—		—		3,371		—		—			—			—			3,371			—			3,371			—			—			—			—			—			—
ESOP distribution in common stock		375		4		6,126		—		—			—			—			6,130			—			6,130			(490	)		(6,130	)		—			—			—			(6,130	)
Balance at September 30, 2018		57,525	$	11,433	$	381,475		441	$	(9,035	)	$	(22,843	)	$	11,631		$	372,661		$	16,790		$	389,451			22,810		$	285,117			14,836		$	(185,376	)	$	8,968		$	108,709

See accompanying Notes to Condensed Consolidated Financial Statements.

- 5 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY AND MEZZANINE EQUITY (CONTINUED)

(Unaudited) (In thousands)

	Common Stock				Paid -In		Common Stock in Treasury					Accumulated Other Compre-hensive			Retained (Deficit)			Total ADS Stockholders’			Non- controlling Interest in			Total Stock- holders’			Redeemable Convertible Preferred Stock						Deferred Compensation Unearned ESOP Shares						Total Mezzanine
	Shares		Amount		Capital		Shares		Amount			Loss			Earnings			Equity			Subsidiaries			Equity			Shares			Amount			Shares			Amount			Equity
Balance at July 1, 2019		58,283	$	11,439	$	501,046		484	$	(10,162	)	$	(24,470	)	$	(278,727	)	$	199,126		$	13,058		$	212,184			22,385		$	279,816			2,559		$	(31,659	)	$	248,157
Net income		—		—		—		—		—			—			7,589			7,589			873			8,462			—			—			—			—			—
Other comprehensive income		—		—		—		—		—			(1,957	)		—			(1,957	)		(353	)		(2,310	)		—			—			—			—			—
Redeemable convertible    preferred stock dividends		—		—		—		—		—			—			(1,349	)		(1,349	)		—			(1,349	)		—			—			—			—			—
Common stock dividends    ($0.09 per share)		—		—		—		—		—			—			(5,238	)		(5,238	)		—			(5,238	)		—			—			—			—			—
Allocation of ESOP shares to    participants for compensation		—		—		2,392		—		—			—			—			2,392			—			2,392			—			—			(247	)		3,094			3,094
Exercise of common stock options		54		1		763		—		—			—			—			764			—			764			—			—			—			—			—
Restricted stock awards		57		1		—		—		—			—			—			1			—			1			—			—			—			—			—
Stock-based    compensation expense		—		—		3,171		—		—			—			—			3,171			—			3,171			—			—			—			—			—
ESOP distribution in common stock		2		—		31		—		—			—			—			31			—			31			(2	)		(31	)		—			—			(31	)
Common Stock Offering		10,350		104		293,544		—		—			—			—			293,648			—			293,648			—			—			—			—			—
Balance at September 30, 2019		68,746		11,545		800,947		484		(10,162	)		(26,427	)		(277,725	)		498,178			13,578			511,756			22,383		$	279,785			2,312		$	(28,565	)	$	251,220
Balance at April 1, 2019		57,964	$	11,436	$	391,039		474	$	(9,863	)	$	(25,867	)	$	17,582		$	384,327		$	13,986		$	398,313			22,611		$	282,638			14,452		$	(180,316	)	$	102,322
Net loss		—		—		—		—		—			—			(218,767	)		(218,767	)		(222	)		(218,989	)		—			—			—			—			—
Other comprehensive loss		—		—		—		—		—			(560	)		—			(560	)		(186	)		(746	)		—			—			—			—			—
Redeemable convertible    preferred stock dividends		—		—		—		—		—			—			(8,195	)		(8,195	)		—			(8,195	)		—			—			—			—			—
Common stock dividends    ($1.18 per share)		—		—		—		—		—			—			(68,345	)		(68,345	)		—			(68,345	)		—			—			—			—			—
Allocation of ESOP shares to    participants for compensation		—		—		4,882		—		—			—			—			4,882			—			4,882			—			—			(495	)		6,188			6,188
ESOP special dividend compensation		—		—		101,189		—		—			—			—			101,189			—			101,189			—			—			(11,645	)		145,563			145,563
Exercise of common stock options		168		2		2,430		7		(207	)		—			—			2,225			—			2,225			—			—			—			—			—
Restricted stock awards		88		1		—		3		(92	)		—			—			(91	)		—			(91	)		—			—			—			—			—
Stock-based    compensation expense		—		—		5,012		—		—			—			—			5,012			—			5,012			—			—			—			—			—
ESOP distribution in    common stock		176		2		2,851		—		—			—			—			2,853			—			2,853			(228	)		(2,853	)		—			—			(2,853	)
Common Stock Offering		10,350		104		293,544		—		—			—			—			293,648			—			293,648			—			—			—			—			—
Balance at September 30, 2019		68,746		11,545		800,947		484		(10,162	)		(26,427	)		(277,725	)		498,178			13,578			511,756			22,383		$	279,785			2,312		$	(28,565	)	$	251,220

See accompanying Notes to Condensed Consolidated Financial Statements.

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Advanced Drainage Systems, Inc.

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

1. BACKGROUND AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Description of Business - Advanced Drainage Systems, Inc. and subsidiaries (collectively referred to as “ADS” or 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.

On July 31, 2019, the Company completed its acquisition (the “Acquisition”) of Infiltrator Water Technologies Ultimate Holdings, Inc. (“Infiltrator Water Technologies”). Infiltrator Water Technologies is a leading national provider of plastic leach field chambers and systems, septic tanks and accessories, primarily for use in residential applications. Infiltrator Water Technologies’ products are used in on-site septic wastewater treatment systems in the United States and Canada. Infiltrator Water Technologies manufactures and sells StormTech and ARC Septic Chambers to certain entities affiliated with ADS. See “Note 3. Acquisitions” for additional information on the Acquisition.

The Company is managed and reports results of operations in three reportable segments: Pipe, Infiltrator Water Technologies and International. The Company also reports its Allied Products and all other business segments as Allied Products and Other.

Historically, sales of the Company’s products have been higher in the first and second quarters of each fiscal year due to favorable weather and longer daylight conditions accelerating construction activity during these periods. Seasonal variations in operating results may also be impacted by inclement weather conditions, such as cold or wet weather, which can delay projects.

Basis of Presentation - The Company prepares its Condensed Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Condensed Consolidated Balance Sheet as of March 31, 2019 was derived from audited financial statements included in the Annual Report on Form 10-K for the year ended March 31, 2019 (“Fiscal 2019 Form 10-K”). The accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments, of a normal recurring nature, necessary to present fairly its financial position as of September 30, 2019 and the results of operations and cash flows for the three and six months ended September 30, 2019. The interim Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, filed in the Company’s Fiscal 2019 Form 10-K.

Principles of Consolidation - The Condensed 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 Condensed Consolidated Balance Sheets and the related equity earnings from these investments are included in Equity in net loss of unconsolidated affiliates in the Condensed Consolidated Statements of Operations. All intercompany balances and transactions have been eliminated in consolidation.

Recent Accounting Guidance

Recently Adopted Accounting Guidance

Leases - In February 2016, the Financial Accounting Standards Board (the “FASB”) issued an accounting standard update (“ASU”) which amends the guidance for leases (“ASC 842”). This standard 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

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Advanced Drainage Systems, Inc.

months or less. The standard 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. In July 2018, the FASB amended ASC 842 to provide another transition method, allowing a cumulative effect adjustment to the opening balance of retained earnings during the period of adoption. The Company adopted these standards effective April 1, 2019 using the transition method in the July 2018 ASU which does not require adjustments to comparative periods or require modified disclosures for those periods and includes transition relief practical expedients. “Note 5. Leases” for further information on the adoption of the new lease ASUs.

Hedge Accounting - In August 2017, the FASB issued an ASU which expanded an entity’s ability to apply hedge accounting for non-financial and financial risk components and provided a simplified approach for fair value hedging of interest rate risk. The standard also refined how entities assess hedge effectiveness. The Company adopted this standard effective April 1, 2019. The new standard did not have an impact on the Condensed Consolidated Financial Statements.

Recent Accounting Guidance Not Yet Adopted

Measurement of Credit Losses - In June 2016, the FASB issued an ASU which provides amended guidance on the measurement of credit losses on financial instruments, including trade receivables. This standard requires the use of an impairment model referred to as the current expected credit loss model. This standard 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 Condensed Consolidated Financial Statements.

Except for the pronouncements described above, there have been no new accounting pronouncements issued or adopted since the filing of the Fiscal 2019 Form 10-K that have significance, or potential significance, to the Condensed Consolidated Financial Statements.

2. LOSS ON DISPOSAL OF ASSETS AND COSTS FROM EXIT AND DISPOSAL ACTIVITIES

In fiscal 2018, the Company initiated restructuring activities (the “2018 Restructuring Plan”), which concluded during fiscal 2019. The following table summarizes the activity included in Loss on disposal of assets and costs from exit and disposal activities recorded during the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,					Six Months Ended September 30,
	2019		2018			2019		2018
	(In thousands)					(In thousands)
Accelerated depreciation	$	—	$	430		$	—	$	430
Plant severance		—		118			—		83
Product optimization		—		303			—		303
Other restructuring activities		—		171			—		202
Total 2018 Restructuring Plan activities	$	—	$	1,022		$	—	$	1,018
Loss (gain) on other disposals and partial disposals of property, plant and equipment		444		(698	)		1,151		410
Acquisition related severance costs		1,560		—			1,560		—
Total loss on disposal of assets and costs from exit and disposal activities	$	2,004	$	324		$	2,711	$	1,428

Approximately $0.7 million of the Total 2018 Restructuring Plan activities related to the Pipe reporting segment for the three and six months ended September 30, 2018, respectively. There was $0.3 million of the

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Advanced Drainage Systems, Inc.

Total 2018 Restructuring Plan activities related to the International reporting segment for the three and six months ended September 30, 2018.

A reconciliation of the beginning and ending amounts of restructuring liability related to the 2018 Restructuring Plan at September 30, 2019 and 2018 is as follows:

	Six Months Ended September 30,
	2019			2018
	(In thousands)
Balance at the beginning of the period	$	1,696		$	3,901
Expenses		—			214
Non-cash expenses		—			59
Payments		(842	)		(1,867	)
Balance at the end of the period	$	854		$	2,307

As of September 30, 2019, the Company had $0.2 million of long-term severance liability related to the restructuring activities recorded in other liabilities in the Condensed Consolidated Balance Sheet. The current portion of the restructuring liability is recorded in Other accrued liabilities in the Condensed Consolidated Balance Sheet.

3. ACQUISITIONS

Acquisition of Infiltrator Water Technologies - On July 31, 2019 (the “Closing Date”), the Company completed its Acquisition of Infiltrator Water Technologies pursuant to an Agreement and Plan of Merger (the “Merger Agreement”) dated July 31, 2019. Infiltrator Water Technologies manufactures and sells wastewater systems for homes and provides drainage chambers for septic and storm water management. The total fair value of consideration transferred was $1,146.0 million. The Merger Agreement was funded through the new Senior Secured Credit Facilities as further described in “Note 11. Debt”. The results of operations of Infiltrator Water Technologies are included in the Condensed Consolidated Statements of Operations after July 31, 2019.

The following table summarizes the consideration transferred and the preliminary purchase price allocation of the assets acquired and liabilities assumed. The Company’s estimates and assumptions are subject to change during the measurement period (up to one year from the Closing Date), as the Company continues to finalize the valuations of assets acquired and liabilities assumed. Such finalizations may result in material changes from the preliminary purchase price allocations.

(Amounts in thousands)	Amount
Cash	$	57,375
Total current assets, excluding cash		75,847
Property, plant and equipment, net		98,860
Goodwill		567,034
Intangible assets, net		475,000
Other assets		14,366
Total current liabilities		(22,756	)
Deferred tax liabilities		(109,926	)
Other liabilities		(9,274	)
Total fair value of consideration transferred	$	1,146,526

The fair value of consideration transferred includes $6.0 million of Infiltrator Water Technologies payable to the Company and $6.6 million of Infiltrator Water Technologies receivable due from the Company.

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Advanced Drainage Systems, Inc.

The goodwill of $567.0 million represents the excess of consideration transferred over the fair value of assets acquired and liabilities assumed and is attributable to expected revenue synergies, as well as operating efficiencies and cost savings. The goodwill is not deductible for tax purposes and is assigned to the Infiltrator Water Technologies segment.

Of the $109.9 million of preliminary purchase price allocated to deferred tax liabilities, $59.8 million related to the step up of GAAP basis for fair market valuations, while the remaining $50.1 million were acquired deferred tax liabilities. Of the total $59.8 million, $55.7 million was attributed to intangible assets.  See “Note 13. Income Taxes” for additional information.

The purchase price excludes transaction costs. During the three and six months ended September 30, 2019, the Company incurred $16.6 million and $20.8 million, respectively, of transaction costs related to the Acquisition such as legal, accounting, valuation and other professional services. The Company estimates approximately $7.3 million of transaction costs during the six months ended September 30, 2019 were not deductible for tax purposes. These costs are included in general and administrative expenses in the Condensed Consolidated Statements of Operations and Condensed Consolidated Statements of Comprehensive Income.

The identifiable intangible assets recorded in connection with the closing of the Acquisition are based on valuations including customer relationships, patents and developed technology, and tradename and trademarks totaling $475.0 million. Customer relationships are amortized using an accelerated method over an estimated useful life of 15 years. Patents and developed technology and tradename and trademarks are on a straight-line basis over the respective useful lives of 10 and 20 years.

(Amounts in thousands)	Preliminary fair value		Estimated useful lives
Customer relationships	$	270,000	15 years
Patents and developed technology		140,000	10 years
Tradename and trademarks		65,000	20 years
Total identifiable intangible assets	$	475,000

The net sales and income before taxes of Infiltrator Water Technologies since the acquisition are included in the Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2019 were $52.7 million and $6.9 million, respectively.

The unaudited pro forma information for the three and six months ended September 30, 2019 and 2018 presented below includes the effects of the Acquisition as if it had been consummated as of April 1, 2018, with adjustments to give effect to pro forma events that are directly attributable to the Acquisition. Adjustments include those related to the amortization of acquired intangible assets, increases in interest expense due to additional borrowings incurred to finance the Acquisition, transaction costs, the elimination of transactions between the Company and Infiltrator Water Technologies and the estimated tax impacts thereof. The unaudited pro forma information does not reflect any operating efficiency or potential cost savings that could result from the consolidation of Infiltrator Water Technologies. Accordingly, the unaudited pro forma information is presented for informational purposes only and is not necessarily indicative of the actual results of the combined company if the Acquisition had occurred at the beginning of the period presented, nor is it indicative of the future results of operations.

	Three Months Ended September 30,				Six Months Ended September 30,
(Amounts in thousands)	2019		2018		2019			2018
Net sales	$	512,072	$	466,484	$	996,016		$	917,533
Net income (loss) attributable to ADS		45,494		30,374		(170,777	)		6,020

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Advanced Drainage Systems, Inc.

4. REVENUE RECOGNITION

Revenue Disaggregation - The Company disaggregates net sales by Domestic, International and Infiltrator Water Technologies and further disaggregates Domestic and International by product type, consistent with its reportable segment disclosure. This disaggregation level best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. Refer to “Note 15. Business Segments Information” for the Company’s disaggregation of Net sales by reportable segment.

Contract Balances - The Company recognizes a contract asset representing the Company’s right to recover products upon the receipt of returned products and a contract liability for the customer refund. The following table presents the balance of the Company’s contract asset and liability as of September 30, 2019 and March 31, 2019:

	September 30, 2019		March 31, 2019
	(In thousands)
Contract asset - product returns	$	1,069	$	646
Refund liability		2,429		1,372

5. LEASES

ASC 842 Adoption - The Company adopted the provisions of ASC 842 beginning on April 1, 2019 using the transition methodology in ASC 842 which does not require adjustments to comparative periods or require modified disclosures. The Company elected the transition relief practical expedient package as described in ASC 842-10-65-1. ASC 842 provides lessees with the option of electing an accounting policy, by class of underlying asset, in which the lessee may choose not to separate nonlease components from lease components. The Company elected this practical expedient for leases of certain classes of equipment, including forklifts and fleet tractors and trailers. The Company also elected the accounting policy to not recognize the right-of-use asset and lease liability for leases with an initial expected term of 12 months or less (“Short-term leases”). The adoption of ASC 842 resulted in the recording of $13.3 million of additional lease liabilities and right-of-use assets to the beginning balance of the Company’s Condensed Consolidated Balance Sheet. Infiltrator Water Technologies adopted ASC 842 on July 31, 2019 using the same methodology and policy elections taken by the Company on April 1, 2019. The Infiltrator Water Technologies adoption of ASC 842 resulted in the recording of $11.2 million of additional lease liabilities and corresponding right-of-use assets to the beginning balance of the Company’s Condensed Consolidated Balance Sheet as of September 30, 2019. The adoption did not have an impact on the Company’s Condensed Consolidated Statement of Operations and Condensed Consolidated Statement of Cash Flows.

Nature of the Company’s Leases - The Company has operating and finance leases for plants, yards, corporate offices, tractors, trailers and other equipment. The Company’s leases have a remaining term of less than one year to 30 years. A portion of the Company’s yard leases include an option to extend the leases for up to 5 years. The Company has included renewal options which are reasonably certain to be excised in its right-of-use asset and lease liability.

The Company’s lease payments are generally fixed. Certain equipment 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 finance leases and a corresponding finance lease obligation was recorded. Therefore, no contingent obligation is needed.

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Advanced Drainage Systems, Inc.

For all leases with an initial expected term of more than 12 months, the Company recorded, at the adoption date of ASC 842 or lease commencement date for leases entered into after the adoption date, a lease liability, which is the lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The Company will utilize its collateralized incremental borrowing rate commensurate to the lease term as the discount rate for its leases, unless the Company can specifically determine the lessor’s implicit rate. The incremental borrowing rate for each lease is determined based on the Company’s credit rating, adjusted for the impacts of collateral, and the lease term.

Lease Cost - The components of lease cost for the three and six months ended September 30, 2019 was as follows:

(Amounts in thousands)	Income Statement Classification	Three Months Ended September 30, 2019		Six Months Ended September 30, 2019
Operating lease cost
Operating lease cost	Cost of goods sold	$	1,179	$	2,127
Operating lease cost	General and administrative		399		489
Short-term lease cost	Cost of goods sold		588		1,324
Total operating lease cost		$	2,166	$	3,940
Finance lease cost
Amortization of right-of-use assets	Cost of goods sold		5,345		9,899
Amortization of right-of-use assets	General and administrative		361		717
Interest on lease liabilities	Interest expense		1,168		2,327
Total finance lease cost		$	6,874	$	12,943

Supplemental cash flow information related to leases for the six months ended September 30, 2019 was as follows:

(Amounts in thousands)	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,616
Operating cash flows from finance leases		2,434
Financing cash flows from finance leases		12,375
Right-of-use assets obtained in exchange for lease obligations:
Operating leases		4,774
Finance leases(a)		1,469

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Advanced Drainage Systems, Inc.

(a) The Company acquired $11.9 million of property, plant and equipment under finance leases in the six months ended September 30, 2018.

Supplemental balance sheet information related to leases as of September 30, 2019 was as follows:

(Amounts in thousands)	Balance Sheet Classification	2019
Operating leases
Right-of-use assets	Other assets	$	24,010
Current lease liabilities	Other accrued liabilities		6,604
Non-current lease liabilities	Other liabilities		17,340
Total operating lease liabilities		$	23,944
Finance leases
Right-of-use assets	Property, plant and equipment		102,948
Current lease liabilities	Current maturities of finance lease obligations		22,555
Non-current lease liabilities	Long-term finance lease obligations		52,746
Total finance lease liabilities		$	75,301
Weighted average lease term
Operating leases			7.18
Finance leases			10.88
Weighted average discount rate
Operating leases			3.53	%
Finance leases			4.96	%

The following is a schedule by year of future minimum lease payments on a rolling twelve-month basis under operating and finance leases and the present value of the net minimum lease payments as of September 30, 2019:

(Amounts in thousands)	Operating Leases		Finance Leases
Year 1	$	7,443	$	25,926
Year 2		6,012		21,258
Year 3		3,742		15,777
Year 4		2,409		9,722
Year 5		1,663		5,740
Thereafter		6,719		6,525
Total minimum lease payments	$	27,988	$	84,948
Less: amount representing interest		4,044		9,647
Present value of net minimum lease payments	$	23,944	$	75,301

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Advanced Drainage Systems, Inc.

Disclosures Related to Periods Prior to Adoption of ASC 842

As of March 31, 2019, total contractual obligations for capital and operating leases were as follows:

(Amounts in thousands)	Operating Leases		Capital Leases
2020	$	4,159	$	26,604
2021		2,924		22,507
2022		1,814		18,064
2023		690		11,721
2024		325		7,143
Thereafter		2,236		8,198
Total minimum lease payments	$	12,148	$	94,237
Less: amount representing interest		—		9,565
Present value of net minimum lease payments	$	12,148	$	84,672

6. INVENTORIES

Inventories as of the periods presented consisted of the following:

	September 30, 2019		March 31, 2019
	(In thousands)
Raw materials	$	60,243	$	47,910
Finished goods		188,671		216,630
Total inventories	$	248,914	$	264,540

There were no work-in-process inventories as of the periods presented.

7. 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 periods 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, the Company 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 Level 3 instruments is estimated as the net present value of expected future cash flows based on internal and external inputs.

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Advanced Drainage Systems, Inc.

Recurring Fair Value Measurements - The assets and liabilities carried at fair value as of the periods presented were as follows:

	September 30, 2019
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Derivative assets – diesel fuel contracts	$	20	$	—	$	20	$	—
Total assets at fair value on a recurring basis	$	20	$	—	$	20	$	—
Liabilities:
Derivative liabilities – diesel fuel contracts	$	81	$	—	$	81	$	—
Total liabilities at fair value on a recurring basis	$	81	$	—	$	81	$	—

	March 31, 2019
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Derivative assets – diesel fuel contracts	$	189	$	—	$	189	$	—
Interest rate swaps		1,088		—		1,088		—
Total assets at fair value on a recurring basis	$	1,277	$	—	$	1,277	$	—
Liabilities:
Derivative liability - diesel fuel contracts	$	283	$	—	$	283	$	—
Foreign exchange contracts		60		—		60		—
Contingent consideration for acquisitions		203		—		—		203
Total liabilities at fair value on a recurring basis	$	546	$	—	$	343	$	203

For the six months ended September 30, 2019 and 2018, respectively, there were no transfers in or out of Levels 1, 2 or 3.

Valuation of Contingent Consideration for Acquisitions - The method used to price these liabilities is considered Level 3. Changes in the fair value of recurring fair value measurements using significant unobservable inputs (Level 3) for the periods presented were as follows:

	Three Months Ended September 30,						Six Months Ended September 30,
	2019			2018			2019			2018
	(In thousands)						(In thousands)
Balance at the beginning of the period	$	57		$	460		$	203		$	578
Change in fair value		40			7			40			9
Payments of contingent consideration liability		(17	)		(142	)		(163	)		(262	)
Balance at the end of the period	$	80		$	325		$	80		$	325

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 (as defined below and further discussed in “Note 11. Debt”) were $350.0 million and $355.3 million, respectively, as of September 30, 2019. The fair value of the Senior Notes was determined based on a quoted market data for the Company’s Senior Notes. The categorization of the framework used to evaluate the Senior Notes is considered Level 2.

The carrying and fair value of the Company’s Prudential Senior Notes (as defined below and further discussed in “Note 13. Debt” to the Company’s audited financial statements included in the Fiscal 2019 Form 10-K)

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Advanced Drainage Systems, Inc.

were zero at September 30, 2019, and $100.0 million and $98.9 million, respectively, at March 31, 2019. The fair value of the Prudential 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 debt under the Term Loan Facility and PNC Credit Agreement (as defined below), 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.

8. DERIVATIVE TRANSACTIONS

The Company uses commodity options in the form of collars and swaps, and has previously used interest rate swaps and foreign currency forward contracts to manage its various exposures to interest rate, commodity price fluctuations and foreign currency exchange rate fluctuations. Interest rate swap gains and losses resulting from the difference between the spot rate and applicable base rate is recorded in the Condensed Consolidated Statements of Operations in Interest expense. For collars, commodity swaps and foreign currency forward contracts, contract settlement gains and losses are recorded in the Condensed Consolidated Statements of Operations in Derivative gains and other 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 Condensed Consolidated Statements of Operations in Derivative gains and other income, net.

The Company recorded net losses and net (gains) on mark-to-market adjustments for changes in the fair value of derivatives contracts as well as net losses and net (gains) on the settlement of derivative contracts as follows:

	Three Months Ended September 30,					Six Months Ended September 30,
	2019		2018			2019			2018
	(In thousands)					(In thousands)
Diesel fuel option collars	$	7	$	154		$	76		$	142
Interest rate swaps		—		(430	)		1,726			(1,043	)
Foreign exchange forward contracts		—		—			(7	)		—
Total net unrealized mark-to-market (gains) loss	$	7	$	(276	)	$	1,795		$	(901	)
Diesel fuel option collars		150		(266	)		157			(574	)
Foreign exchange forward contracts		102		(39	)		102			(90	)
Interest rate swaps		710		(67	)		544			(92	)
Total net realized loss (gains)	$	962	$	(372	)	$	803		$	(755	)

A summary of the fair value of derivatives is included in “Note 7. Fair Value Measurement.”

9. NET INCOME PER SHARE AND STOCKHOLDERS’ EQUITY

The Company is required to apply the two-class method to compute both basic and diluted net income 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.

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Advanced Drainage Systems, Inc.

The following table presents information necessary to calculate net income per share for the periods presented, 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:

	Three Months Ended September 30,						Six Months Ended September 30,
(In thousands, except per share data)	2019			2018			2019			2018
NET INCOME PER SHARE—BASIC:
Net income (loss) attributable to ADS	$	7,589		$	28,670		$	(218,767	)	$	60,950
Adjustments for:
Dividends to redeemable convertible preferred    stockholders		(1,355	)		(478	)		(8,196	)		(975	)
Dividends paid to unvested restricted stockholders		(4	)		(15	)		(330	)		(30	)
Net income (loss) available to common stockholders    and participating securities		6,230			28,177			(227,293	)		59,945
Undistributed income allocated to participating    securities		(204	)		(2,310	)		—			(5,022	)
Net income (loss) available to common    stockholders – Basic	$	6,026		$	25,867		$	(227,293	)	$	54,923
Weighted average number of common shares    outstanding – Basic		60,222			56,929			58,906			56,776
Net income (loss) per common share – Basic	$	0.10		$	0.45		$	(3.86	)	$	0.97
NET INCOME PER SHARE—DILUTED:
Net income (loss) available to common    stockholders – Diluted	$	6,026		$	25,867		$	(227,293	)	$	54,923
Weighted average number of common shares    outstanding – Basic		60,222			56,929			58,906			56,776
Assumed exercise of stock options		576			629			—			598
Restricted stock		78			—			—			—
Weighted average number of common shares    outstanding – Diluted		60,876			57,558			58,906			57,374
Net income (loss) per common share – Diluted	$	0.10		$	0.45		$	(3.86	)	$	0.96
Potentially dilutive securities excluded as    anti-dilutive		15,084			6,303			13,269			6,229

Common Stock Offering – On September 10, 2019, the Company issued and sold an aggregate of 10,350,000 shares of common stock, $0.01 par value per share, which included the full exercise of the underwriters’ option to purchase additional shares, at a price of $29.75 per share, before underwriting discounts and commissions. The common stock was sold pursuant to the Company’s shelf registration statement and related prospectus supplement. The Company received proceeds of $293.6 million from the issuance after deducting underwriting discounts and commissions and offering expenses. The Company used the net proceeds for the repayment of a portion of the outstanding borrowings under the Senior Secured Credit Facility.

Stockholders’ Equity - The Company did not repurchase any shares of common stock during the three and six months ended September 30, 2019 and 2018. In February 2017, the Company’s Board of Directors’ authorized the Company to repurchase up to $50 million of ADS common stock in accordance with applicable securities laws. As of September 30, 2019, approximately $42.1 million of common stock may be repurchased under the authorization. The repurchase program does not obligate the Company to acquire any particular amount of common stock and may be suspended or terminated at any time at the Company’s discretion.

Special Dividend and the Employees Stock Ownership Plan (“ESOP”) - During the three months ended June 30, 2019, the Board of Directors approved a special cash dividend of $1.00 per share and quarterly dividends of $0.09. The special and quarterly dividend were paid to all stockholders on June 14, 2019 to stockholders of record at the close of business on June 3, 2019. The total dividend payment was $81.6 million. The dividends

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Advanced Drainage Systems, Inc.

received by the unallocated redeemable convertible preferred stock held in the ESOP trust was used to pay $12.0 million of the ESOP loan back to the Company resulting in approximately 11.6 million shares of the Company’s redeemable convertible preferred stock being allocated to ESOP participants. The Company recognized $246.8 million in stock-based compensation expense based on the fair value on the date the Board of Directors approved the special dividend. The Board of Director’s approval committed the ESOP to use those proceeds to pay down the ESOP loan. The special dividend compensation expense was recognized in Cost of goods sold - ESOP special dividend compensation and Selling, general and administrative expenses - ESOP special dividend compensation on the Company’s Consolidated Statement of Operations. The Company’s ESOP is further described in “Note 16. Employee Benefit Plans” to the Company’s audited financial statements included in the Fiscal 2019 Form 10-K.

10. RELATED PARTY TRANSACTIONS

ADS Mexicana - ADS conducts business in Mexico and Central America through its joint venture ADS Mexicana, S.A. de C.V. (together with its affiliate ADS Corporativo, S.A. de C.V., “ADS Mexicana”). ADS owns 51% of the outstanding stock of ADS Mexicana and consolidates ADS Mexicana for financial reporting purposes.

On June 22, 2018, the Company and ADS Mexicana entered into an Intercompany Revolving Credit Promissory Note (the “Intercompany Note”) with a borrowing capacity of $12.0 million. The Intercompany Note matures on June 22, 2022. The other joint venture partner indemnifies the Company for 49% of any unpaid borrowing. The interest rates under the Intercompany Note are determined by certain base rates or London Interbank Offered Rate (“LIBOR”) plus an applicable margin based on the Leverage Ratio. As of September 30, 2019, there were no borrowings under the Intercompany Note.

South American Joint Venture - The Tuberias Tigre - ADS Limitada joint venture (the “South American Joint Venture”) manufactures and sells HDPE corrugated pipe in certain South American markets. ADS owns 50% of the South American Joint Venture. 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 Condensed 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 Condensed Consolidated Balance Sheets. ADS is the guarantor of 50% of the South American Joint Venture’s credit facility, and the debt guarantee is shared equally with the joint venture partner. The Company’s maximum potential obligation under this guarantee is $11.0 million as of September 30, 2019. The maximum borrowings permitted under the South American Joint Venture’s credit facility are $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 September 30, 2019 and March 31, 2019, the outstanding principal balances of the credit facility including letters of credit were $11.2 million and $12.3 million, respectively. As of September 30, 2019, there were no U.S. dollar denominated loans. The weighted average interest rate as of September 30, 2019 was 5.3% on Chilean peso denominated loans.

ADS and the South American Joint Venture have shared services arrangements in order to execute the joint venture services. In addition, the South American Joint Venture has entered into agreements for pipe and other product sales to ADS and its other related parties, which totaled $0.1 million and $0.5 million for the three and six months ended September 30, 2019, and zero and $0.6 million for the three and six months ended September 30, 2018. ADS pipe sales to the South American Joint Venture were $0.1 million and $0.4 million for the three and six months ended September 30, 2019, and $0.4 million and $0.6 million for the three and six months ended September 30, 2018, respectively.

Tigre USA - Tigre USA was a joint venture that ADS no longer has an ownership interest in, but the owner is the partner for the South American Joint Venture.

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Advanced Drainage Systems, Inc.

ADS purchased $0.6 million and $1.2 million of Tigre USA manufactured products for use in the production of ADS products during the three and six months ended September 30, 2019. ADS purchased $0.7 million and $1.2 million of Tigre USA manufactured products for use in the production of ADS products during the three and six months ended September 30, 2018.

11. DEBT

Long-term debt as of the periods presented consisted of the following:

	September 30, 2019			March 31, 2019
	(In thousands)
Term Loan Facility	$	700,000		$	—
Senior Notes		350,000			—
Revolving Credit Facility		—			—
PNC Credit Agreement		—			134,400
Prudential Senior Notes		—			100,000
Equipment financing		1,963			2,427
Total		1,051,963			236,827
Unamortized debt issuance costs		(2,614	)		(2,293	)
Current maturities		(6,195	)		(25,932	)
Long-term debt obligation	$	1,043,154		$	208,602

Bridge Credit Facility

On July 31, 2019, the Company entered into a credit agreement (the “Base Credit Agreement”) by and among the Company, as borrower, Barclays Bank PLC, as administrative agent, the several lenders from time to time party thereto.

The Base Credit Agreement provided for a term loan facility in an initial aggregate principal amount of up to $1.3 billion (the “Bridge Loan Facility”), a revolving credit facility in an initial aggregate principal amount of up to $350 million (the “Bridge Revolving Credit Facility”), a letter of credit sub-facility in the initial aggregate available amount of up to $50 million, as a sublimit of such Revolving Credit Facility (the “Bridge L/C Facility”) and a swing line sub-facility in the aggregate available amount of up to $50 million, as a sublimit of the Revolving Credit Facility (together with the Bridge Loan Facility, the Bridge Revolving Credit Facility and the Bridge L/C Facility, the “Bridge Credit Facility”).

On July 31, 2019, the Company borrowed approximately $1.3 billion under the Bridge Loan Facility and $145 million under the Bridge Revolving Credit Facility, which amounts were to (i) finance the consideration paid in connection with the closing of the Acquisition, (ii) repay the total outstanding amount as of the Closing Date under the Company’s then existing revolving credit facility with PNC, (iii) repay outstanding amounts of existing indebtedness incurred by Infiltrator Water Technologies under its outstanding credit facility in effect prior to the Acquisition, and (iv) pay certain transaction fees and expenses associated with the Acquisition and the Bridge Loan Facility. Approximately $300.0 million of outstanding borrowings under the Base Credit Agreement were repaid on September 10, 2019 with proceeds from the Company’s public offering of common stock as further described in “Note 9, Net Income Per Share and Stockholders’ Equity” and approximately $300.0 million of outstanding borrowings under the Bridge Loan Facility were repaid on September 23, 2019 with proceeds from the Company’s offering of $350.0 million Senior Notes, as defined and further described below.

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Advanced Drainage Systems, Inc.

As a result of this borrowing, on July 31, 2019, the Company initially capitalized approximately $46.9 million of deferred financing fees associated with the Bridge Credit Facility. This amount was later reduced by $14.9 million due to refunds received by ADS. The remaining deferred financing costs were written off due to loss on early extinguishment of debt resulting from the $300.0 million principal payment primarily from the Common Stock Offering, $300.0 million principal payment from the issuance of Senior Notes due 2027, and $700 million principal payment from the issuance of the Senior Secured Credit Facility on September 24, 2019. These financings resulted in the Company treating the Bridge Credit Facility as having been extinguished and replaced with the Common Stock Offering, Senior Notes due 2027 and the syndicated Senior Secured Credit Facility for accounting purposes under ASC 470-50. The loss on early extinguishment of debt, which is included in interest expense in the Company's Condensed Consolidated Statements of Operations, primarily reflects the write-off of unamortized debt issuance costs and discounts.

Repayment of Prudential Senior Notes

On July 29, 2019, the Company repaid in full all of its and its subsidiaries’ indebtedness and other obligations totaling $104.4 million under that certain Second Amended and Restated Private Shelf Agreement, dated as of June 22, 2017 (as amended the “Shelf Note Agreement”) of the Company’s Senior Notes (“Prudential Senior Notes”), by and among the Company, as issuer, the guarantors from time to time a party thereto, PGIM, Inc., as a purchaser and the other purchasers from time to time a party thereto. The Company repaid the outstanding indebtedness under the Shelf Note Agreement using borrowings from the Company’s Second Amended and Restated Credit Agreement (the “PNC Credit Agreement”) as in effect as of July 29, 2019. Concurrently with the repayment, the Shelf Noteholders authorized and directed PNC Bank, National Association, in its capacity as Collateral Agent (as defined in the Shelf Note Agreement) to release the security interests and liens securing the Shelf Note Agreement and the Shelf Note Agreement was terminated.

As a result of the repayment described above, the Company expensed approximately $4.2 million primarily consisting of prepayment premiums associated with the debt payoff activity and the write-off of unamortized deferred financing fees, as the payoff meets the criteria to be accounted for as a debt extinguishment.

Repayment of PNC Credit Agreement

On the Closing Date, using borrowings of the new Bridge Loan Facility the Company repaid in full all of its and its subsidiaries indebtedness and other obligations totaling $239.2 million under the PNC Credit Agreement. Concurrently with the repayment, all security interests and liens held by the Collateral Agent (as defined in the PNC Credit Agreement) securing the PNC Credit Agreement were terminated and released and the PNC Credit Agreement was terminated.

As a result of the repayment described above, the Company expensed approximately $2.0 million primarily consisting of the write-off of unamortized deferred financing fees associated with the debt payoff activity, as the payoff meets the criteria to be accounted for as a debt extinguishment.

Letters of credit outstanding at March 31, 2019 amounted to $8.5 million, and reduced the availability of the revolving credit facilities under the PNC Credit Agreement with PNC Bank, National Association, as administrative agent and various financial institutions thereto at March 31, 2019.

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Advanced Drainage Systems, Inc.

Issuance of Senior Notes due 2027

On September 23, 2019, the Company issued $350.0 million aggregate principal amount of 5.0% senior notes due 2027 (the “Senior Notes”) pursuant to an Indenture, dated September 23, 2019 (the “Indenture”), among the Company, the guarantors party thereto (the “Guarantors”) and U.S. Bank National Association, as Trustee (the “Trustee”). The Senior Notes are guaranteed by each of the Company’s present and future direct and indirect wholly owned domestic subsidiaries that is a guarantor under the Company's Senior Secured Credit Facility. The Senior Notes were offered and sold either to persons reasonably believed to be “qualified institutional buyers” pursuant to Rule 144A under the Securities Act of 1933 (the “Securities Act”) or to persons outside the United States under Regulation S of the Securities Act.

Interest on the Senior Notes will be payable semi-annually in cash in arrears on March 31 and September 30 of each year, commencing on March 31, 2020, at a rate of 5.0% per annum. The Senior Notes will mature on September 30, 2027. The Company used the majority of the net proceeds from the offering of the Senior Notes for the repayment of $300.0 million of its outstanding borrowings under the Company’s Bridge Loan Facility. The deferred financing costs associated with the Senior Notes totaled $2.1 million as of September 30, 2019 and are recorded as a direct reduction from the carrying amount of the related debt.

The Company may redeem the Senior Notes, in whole or in part, at any time on or after September 30, 2022 at established redemption prices. At any time prior to September 30, 2022, the Company may also redeem up to 40% of the Senior Notes with net cash proceeds of certain equity offerings at a redemption price equal to 105.0% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. In addition, at any time prior to September 30, 2022, the Company may redeem the Senior Notes, in whole or in part, at a redemption price equal to 100% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date plus an applicable “make-whole” premium.

The Indenture contains customary events of default, including, among other things, payment default, failure to comply with covenants or agreements contained in the Indenture or the Senior Notes and certain provisions related to bankruptcy events. The Indenture also contains customary negative covenants.

New Senior Secured Credit Facility

On September 24, 2019, the Company successfully completed a $700 million syndication of the remaining balance of the Bridge Credit Facility subsequent to the aforementioned Common Stock Offering and Senior Notes due 2027 and in connection with the syndication, the Company amended the Base Credit Agreement (the “Senior Secured Credit Facility”). The Senior Secured Credit Facility reduced the applicable margin utilized in the determination of the interest rate, as well as other provisions.

The Senior Secured Credit Facility provides for a term loan facility in an initial aggregate principal amount of $700 million (the “Term Loan Facility”), a revolving credit facility in an initial aggregate principal amount of up to $350 million (the “Revolving Credit Facility”), a letter of credit sub-facility in the initial aggregate available amount of up to $50 million, as a sublimit of such Revolving Credit Facility (the “L/C Facility”) and a swing line sub-facility in the aggregate available amount of up to $50 million, as a sublimit of the Revolving Credit Facility (together with the Term Loan Facility, the Revolving Credit Facility and the L/C Facility, the “Senior Secured Credit Facility”). Letters of credit outstanding at September 30, 2019 amounts to $8.5 million and reduced the availability of the Revolving Credit Facility.

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Advanced Drainage Systems, Inc.

In connection with entering into the Senior Secured Credit Facility, the Company capitalized approximately $0.4 million in deferred financing fees. To the extent not previously paid, all then-outstanding amounts under the Term Loan Facility are due and payable on the maturity date of the Term Loan Facility, which is seven years from the Closing Date. Borrowings under the Revolving Credit Facility are available beginning on September 24, 2019 and, to the extent not previously paid, all then-outstanding amounts under the Revolving Credit Facility are due and payable on the maturity date of the Revolving Credit Facility, which is five years from the Closing Date.

At the option of the Company, borrowings under the Term Loan Facility and under the Revolving Credit Facility (subject to certain limitations) bear interest at either a base rate (as determined pursuant to the Senior Secured Credit Facility) or at a Eurocurrency Rate, based on LIBOR (as defined in the Senior Secured Credit Facility), plus the applicable margin as set forth therein from time to time. In the case of the Revolving Credit Facility, the applicable margin is based on the Company’s consolidated senior secured net leverage ratio (as defined in the Senior Secured Credit Facility). All borrowings under the Term Loan Facility used to finance the Merger Consideration as described above initially bear interest at a Eurocurrency Rate applicable to Eurocurrency Loans (as defined in the Senior Secured Credit Facility) denominated in U.S. Dollars.

The Company is also required to pay a commitment fee that is based upon the undrawn amounts of the Revolving Credit Facility at a rate per annum based upon a calculated ratio as prescribed within the Senior Secured Credit Facility. As of September 30, 2019, the rate the Company was committed to paying on the undrawn portion was equal to 0.2%.

The Company’s obligations under the Senior Secured Credit Facility have been secured by granting a first priority lien on substantially all of the Company’s assets (subject to certain exceptions and limitations), and each of Stormtech, LLC, Advanced Drainage of Ohio, Inc. and Infiltrator Water Technologies, LLC (collectively the “Guarantors”) has agreed to guarantee the obligations of the Company under the Senior Secured Credit Facility and to secure the obligations thereunder by granting a first priority lien in substantially all of such Guarantor’s assets (subject to certain exceptions and limitations).

Principal Maturities – Maturities of long-term debt (excluding interest and deferred financing costs) as of September 30, 2019 are summarized below:

	Twelve Months Ended September 30,
(Amounts in thousands)	2020		2021		2022		2023		2024		Thereafter		Total
Principal maturities	$	6,195	$	7,931	$	7,084	$	7,000	$	7,000	$	1,016,753	$	1,051,963

12. 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 non-cancelable purchase contracts in place at September 30, 2019, the Company has agreed to purchase resin over the period October 2019 through December 2019 at a committed purchase cost of $5.9 million.

The Company enters into equipment purchase contracts with manufacturers. Under such non-cancelable purchase contracts in place at September 30, 2019, the Company has agreed to purchase equipment to be delivered in fourth quarter of fiscal 2020 at a committed purchase cost of $1.4 million.

Litigation and Other Proceedings – 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 former 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 alleged that the Company made material misrepresentations and/or omissions of material

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Advanced Drainage Systems, Inc.

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 appealed to the United States Court of Appeals for the Second Circuit, and on October 13, 2017 the District Court’s judgment was affirmed by the Second Circuit. On October 27, 2017, plaintiff filed a petition for rehearing with the Second Circuit. The Second Circuit denied the petition for rehearing on November 28, 2017. On November 27, 2018, the plaintiff filed with the District Court a motion for relief from final judgment and for leave to file an amended complaint, which, the defendants opposed. On July 3, 2019, the District Court denied the plaintiff’s motion. The Plaintiff did not appeal the District Court’s decision and the matter is concluded.

The Company is involved from time to time in various legal proceedings that arise in the ordinary course of 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 the Company’s financial position or results of operations. The Company records a liability when a loss is considered probable, and the amount can be reasonably estimated.

Other Commitments and Contingencies

In March 2019, the Company initiated an internal investigation process, under the guidelines of the Company’s Code of Business Conduct and Ethics, into its consolidated joint venture affiliate ADS Mexicana’s senior management’s ethical and business conduct, as well as compliance of certain products with, along with considerations into, Mexican laws and regulations over the previous 12 months. The Company has recorded an accrual for the current estimate of probable losses resulting from the investigation which is not material to our Condensed Consolidated Financial Statements. However due to the inherent uncertainties in determining the use, installation application and location of our ADS Mexicana products sold, along with the consideration of Mexican laws and regulations related to warranty and product liability obligations, the Company is unable to determine the maximum potential future losses that may occur, which could be material to the Condensed Consolidated Financial Statements.

13. INCOME TAXES

The Company’s effective tax rate will vary based on a variety of factors, including overall profitability, the geographical mix of income before taxes and related tax rates in jurisdictions where it operates and other one-time charges, as well as discrete events. For the three months ended September 30, 2019 and 2018, the Company utilized an effective tax rate of (75.3%) and 28.9%, respectively, to calculate its provision for income taxes. The decrease in the effective tax rate is primarily driven by the nearly break-even pre-tax income in the second quarter of fiscal 2020 compared to the second quarter of fiscal 2019 and the changes to the Company’s projected annual effective tax rate. The change in the Company’s projected annual effective tax rate was due to the financial results of the recent acquisition of Infiltrator Water Technologies. Further, the Company recognized additional expense of approximately $1.1 million related to non-deductible transaction costs. Consistent with the three months ended September 30, 2018, state and local income taxes and the Company’s ESOP increased the rate for the three months ended September 30, 2019.

For the six months ended September 30, 2019 and 2018, the Company utilized an effective tax rate of (9.4%) and 29.4%, respectively, to calculate its provision for income taxes. In addition to the special dividend made on June 14, 2019, there were additional transaction costs related to the Infiltrator Acquisition noted above, that attributed to large pretax losses for the six months ended September 30, 2019, that did not occur in the comparison period. Consistent with the six months ended September 30, 2018, state and local income taxes and the Company’s ESOP increased the rate for the six months ended September 30, 2019. Additionally, the effective tax rate for the six months ended September 30, 2019 differed from the federal statutory rate primarily due to a $60.7 million discrete income tax expense. This discrete event related to the 11.6 million shares allocated from the ESOP as a result of the special dividend made on June 14, 2019 and the Company recognizing approximately $246.8 million in additional stock-based compensation expense. Of the total stock-

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Advanced Drainage Systems, Inc.

based compensation expense, approximately $237.6 million related to non-deductible stock appreciation. This discrete event reduced the effective tax rate by 30.3%.

As discussed in “Note 3. Acquisitions”, the Company acquired Infiltrator Water Technologies on July 31, 2019. The unrecognized tax benefits increased by $1.4 million during the quarter, related to positions taken by Infiltrator Water Technologies prior to the Acquisition. Infiltrator Water Technologies was previously indemnified for this position, and based on the nature of the Acquisition, the indemnification is still in place. Lastly, as part of the purchase price, approximately $109.9 million was attributed to deferred tax liabilities. Of the $109.9 million, $59.8 million related to the step up of GAAP basis for fair market valuations, while the remaining $50.1 million were acquired deferred tax liabilities. Of the total $59.8 million, $55.7 million was attributed to intangibles.

14. STOCK-BASED COMPENSATION

ADS has several programs for stock-based payments to employees and non-employee members of its Board of Directors, including stock options and restricted stock. Equity-classified restricted stock awards are measured based on the grant-date estimated fair value of each award. The Company accounts for all restricted stock granted to Directors as equity-classified awards. The Company recognized stock-based compensation expense in the following line items of the Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Component of income before income taxes:
Cost of goods sold	$	189	$	82	$	301	$	144
Selling expenses		179		50		235		86
General and administrative expenses		2,803		1,680		4,476		3,141
Total stock-based compensation expense	$	3,171	$	1,812	$	5,012	$	3,371

The following table summarizes stock-based compensation expense by award type for the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Stock-based compensation expense:
Equity-classified Stock Options	$	700	$	795	$	1,251	$	1,568
Restricted Stock		957		528		1,599		974
Performance Units		1,201		235		1,573		332
Non-Employee Directors		313		254		589		497
Total stock-based compensation expense	$	3,171	$	1,812	$	5,012	$	3,371

2017 Omnibus Plan

On May 24, 2017, the Board of Directors approved the 2017 Omnibus Incentive Plan (the “2017 Incentive Plan”) which was approved by the Company’s stockholders on July 17, 2017. The 2017 Incentive Plan provides for the issuance of a maximum of 3.5 million shares of the Company’s common stock for awards made thereunder, which awards may consist of stock options, restricted stock, restricted stock units, stock appreciation rights, phantom stock, cash-based awards, performance awards (which may take the form of performance cash, performance units or performance shares) or other stock-based awards.

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Advanced Drainage Systems, Inc.

Restricted Stock - During the three and six months ended September 30, 2019, the Company granted 0.1 million and 0.2 million shares of restricted stock with a grant date fair value of $3.6 million and $6.9 million, respectively.

Performance Units - In addition, during the six months ended September 30, 2019, the Company granted 0.1 million performance units, subject to performance and services conditions. The grant date fair value of the performance units was $3.4 million, based on the market price of the Company’s common stock at the date of the grant. For the performance units, 50% of the award is based upon the achievement of certain levels of Return on Invested Capital for the performance period and 50% is based upon the achievement of certain levels of Free Cash Flow for the performance period. The performance units have a 3-year performance period from April 1, 2019 through March 31, 2022. The performance units, and any accrued dividend equivalents, will be settled in shares of the Company’s common stock, if the applicable performance and service conditions are satisfied.

Options - During the six months ended September 30, 2019, the Company granted 0.3 million nonqualified stock options under the 2017 Incentive Plan. The grant date fair value of the nonqualified stock options was $2.7 million. The Company estimates the fair value of stock options using a Black-Scholes option-pricing model. The following table summarizes the assumptions used in estimate the fair value of stock-options during the six months ended September 30, 2019:

	Three Months Ended September 30,
Common stock price	$27.44
Expected stock price volatility	30.9%
Risk-free interest rate	2.3%
Weighted-average expected option life (years)	6.0
Dividend yield	1.3%

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Advanced Drainage Systems, Inc.

15. BUSINESS SEGMENTS INFORMATION

Following the Acquisition of Infiltrator Water Technologies, the Company revised its reportable segments to reflect how the Chief Operating Decision Maker (“CODM”) currently reviews financial information and makes operational decisions.  After the Acquisition, ADS operates its business in three distinct reportable segments: “Pipe”, “International” and “Infiltrator Water Technologies.” “Allied Products & Other” represents the Company’s Allied Products and all other business segments. “Pipe” and “Allied Products & Other” were previously included as Domestic. With the change in reportable segments, the CODM is now evaluating segment reporting based on Net Sales and Segment Adjusted Gross Profit. The Company calculated Segment Adjusted Gross Profit as net sales less costs of goods sold, depreciation and amortization, stock-based compensation and non-cash charges. A measure of assets is not applicable, as segment assets are not regularly reviewed by the CODM for evaluating performance or allocating resources. The prior period segment results and related disclosures have been recast to conform to the current year presentation.

Pipe – The Pipe segment manufactures and markets high performance thermoplastic corrugated pipe 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, buying groups and co-ops, major national retailers as well as an extensive network of hundreds of small to medium-sized distributors across the U.S.

Products include single wall pipe, N-12 HDPE pipe sold into the Storm sewer, Infrastructure and Agriculture markets, High Performance polypropylene pipe sold into the Storm sewer, Infrastructure and sanitary sewer markets. Products are designed primarily for storm water management in the construction and infrastructure marketplace across a broad range of end markets and applications, including non-residential, residential, agriculture and infrastructure. Products are manufactured using HDPE and polypropylene plastic material.

Infiltrator Water Technologies – Infiltrator Water Technologies is a leading national provider of plastic leach field chambers and systems, septic tanks and accessories, primarily for use in residential applications. Infiltrator Water Technologies products are used in on-site septic wastewater treatment systems in the United States and Canada.

International – The International segment manufactures and markets pipe and allied products in certain regions outside of the United States, including Company owned facilities in Canada, subsidiaries that distribute to Europe and the Middle East, exports and through the Company’s joint ventures with local partners in Mexico and South America. 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 lines include single wall pipe, N-12 HDPE pipe, high performance PP pipe and certain geographies also sell our broad line of Allied Products.

Allied Products & Other – Allied Products and Other manufactures and markets products throughout the United States. Products include StormTech, Nyloplast, ARC Septic Chambers, Inserta Tee, BaySaver filters and water quality structures, Fittings, and FleXstorm. 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.

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Advanced Drainage Systems, Inc.

The following table sets forth reportable segment information with respect to the amount of Net sales contributed by each class of similar products for the periods presented:

	Three Months Ended
	September 30, 2019								September 30, 2018
	Net Sales			Intersegment Net Sales			Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	281,405		$	(342	)	$	281,063	$	249,380	$	—	$	249,380
Infiltrator Water Technologies		64,889			(12,189	)		52,700		—		—		—
International
International - Pipe		34,617			—			34,617		44,008		—		44,008
International - Allied Products		13,167			—			13,167		11,278		—		11,278
Total International		47,784			—			47,784		55,286		—		55,286
Allied Products & Other		114,358			—			114,358		101,889		—		101,889
Intersegment Eliminations		(12,531	)		12,531			—		—		—		—
Total Consolidated	$	495,905		$	—		$	495,905	$	406,555	$	—	$	406,555
	Six Months Ended
	September 30, 2019								September 30, 2018
	Net Sales			Intersegment Net Sales			Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	543,586		$	(342	)	$	543,244	$	491,450	$	—	$	491,450
Infiltrator Water Technologies		64,889			(12,189	)		52,700		—		—		—
International
International - Pipe		63,902			—			63,902		78,456		—		78,456
International - Allied Products		23,216			—			23,216		22,179		—		22,179
Total International		87,118			—			87,118		100,635		—		100,635
Allied Products & Other		226,551			—			226,551		202,317		—		202,317
Intersegment Eliminations		(12,531	)		12,531			—		—		—		—
Total Consolidated	$	909,613		$	—		$	909,613	$	794,402	$	—	$	794,402

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Advanced Drainage Systems, Inc.

The following sets forth certain financial information attributable to the reportable segments for the periods presented.

	Three Months Ended September 30,					Six Months Ended September 30,
	2019			2018		2019			2018
	(In thousands)					(In thousands)
Segment adjusted gross profit
Pipe	$	74,246		$	53,561	$	131,739		$	112,027
Infiltrator Water Technologies		30,144			—		30,144			—
International		10,841			12,088		20,068			21,874
Allied Products & Other		57,621			47,160		114,808			96,172
Intersegment Elimination		(978	)		—		(978	)		—
Total	$	171,874		$	112,809	$	295,781		$	230,073
Depreciation and amortization
Pipe	$	11,557		$	11,811	$	23,104		$	24,030
Infiltrator Water Technologies		1,859			—		1,859			—
International		1,590			1,524		3,097			3,021
Allied Products & Other(a)		11,560			4,201		15,200			8,312
Total	$	26,566		$	17,536	$	43,260		$	35,363
Capital expenditures
Pipe	$	9,383		$	9,303	$	16,357		$	14,016
Infiltrator Water Technologies		3,883			—		3,883			—
International		623			816		1,877			1,808
Allied Products & Other(a)		2,010			2,306		3,505			3,475
Total	$	15,899		$	12,425	$	25,622		$	19,299

(a) Includes depreciation and amortization and capital expenditures not allocated to a reportable segment.

Reconciliation of Gross Profit to Segment Adjusted Gross profit

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Reconciliation of Segment Adjusted Gross Profit:
Total Gross Profit	$	146,524	$	95,373	$	84,366	$	195,064
Depreciation and amortization		15,708		14,354		29,392		29,072
ESOP and stock-based compensation expense		3,869		3,082		7,640		5,937
ESOP special dividend compensation		—		—		168,610		—
Inventory step up related to    Infiltrator Water Technologies acquisition		5,773		—		5,773		—
Total Segment Adjusted Gross Profit	$	171,874	$	112,809	$	295,781	$	230,073

16. SUBSEQUENT EVENTS

Common Stock Dividend - During the third quarter of fiscal 2020, the Company declared a quarterly cash dividend of $0.09 per share of common stock. The dividend is payable on December 13, 2019 to stockholders of record at the close of business on November 29, 2019.

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Advanced Drainage Systems, Inc.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Unless the context otherwise indicates or requires, as used in this Quarterly Report on Form 10-Q, the terms “we,” “our,” “us,” “ADS” and the “Company” refer to Advanced Drainage Systems, Inc. and its directly- and indirectly-owned subsidiaries as a combined entity, except where it is clear that the terms mean only Advanced Drainage Systems, Inc. exclusive of its subsidiaries.

Our fiscal year begins on April 1 and ends on March 31. Unless otherwise noted, references to “year” pertain to our fiscal year. For example, 2020 refers to fiscal 2020, which is the period from April 1, 2019 to March 31, 2020.

The following discussion and analysis of the financial condition and results of our operations should be read in conjunction with our Condensed Consolidated Financial Statements and related footnotes included elsewhere in this Quarterly Report on Form 10-Q and with the audited Consolidated Financial Statements included in our Fiscal 2019 Form 10-K, as filed with the Securities and Exchange Commission (the “SEC”) on May 30, 2019. In addition to historical condensed consolidated financial information, the following discussion contains forward-looking statements that reflect our plans, estimates and beliefs. Our actual results could differ materially from those discussed in the forward-looking statements. This discussion contains forward-looking statements that are based on the beliefs of our management, as well as assumptions made by, and information currently available to, our management. Our actual results could differ materially from those discussed in the forward-looking statements. For more information, see the section below entitled “Forward Looking Statements.”

We consolidate our joint ventures for purposes of GAAP, except for our South American Joint Venture.

Overview

We are the leading global manufacturer of water management products and solutions for non-residential, residential, infrastructure and agricultural applications. With the acquisition of Infiltrator Water Technologies in the second quarter of fiscal 2020, we are now a leading provider of plastic leach field chambers, septic tanks and accessories, for use primarily in residential applications.

Executive Summary

Second Quarter Fiscal 2020 Results

• Net sales increased 22.0% to $495.9 million

• Net income of $8.5 million as compared to $29.4 million in the prior year

• Adjusted EBITDA (Non-GAAP) increased 65.2% to $118.2 million

Net sales increased $89.4 million or 22.0% to $495.9 million, as compared to $406.6 million in the prior year. Domestic pipe sales increased $32.0 million or 12.8% to $281.4 million. Allied & Other sales increased $12.5 million or 12.2% to $114.4 million. These increases were driven by strong performance in both the U.S. construction and agriculture end markets. International net sales decreased $7.5 million or 13.6% to $47.8 million, driven primarily by decreases in Canada and Mexico sales. Infiltrator Water Technologies contributed an additional $64.9 million to net sales in the quarter.

Gross profit increased $51.2 million or 53.6% to $146.5 million as compared to $95.4 million in the prior year. The increase is primarily due to an increase in both pipe and allied product sales as well as favorable material cost. Infiltrator Water Technologies contributed an additional $22.5 million to gross profit in the quarter.

Adjusted EBITDA (Non-GAAP) increased $46.6 million or 65.2% to $118.2 million, as compared to $71.5 million in the prior year. The increase is primarily due to the factors mentioned above. As a percentage of net sales, Adjusted EBITDA was 23.8% as compared to 17.6% in the prior year.

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Advanced Drainage Systems, Inc.

Year-to-Date Fiscal 2020 Results

• Net sales increased 14.5% to $909.6 million

• Net loss of $219.0 million as compared to net income of $63.0 million in the prior year

o Includes $246.8 million of additional ESOP stock-based compensation expense due to the ESOP special dividend

• Adjusted EBITDA (Non-GAAP) increased 35.3% to $198.5 million

• Cash provided by operating activities increased $113.6 million to $171.7 million

• Free cash flow (Non-GAAP) increased $107.2 million to $146.1 million

Net sales increased $115.2 million or 14.5% to $909.6 million, as compared to $794.4 million in the prior year. Domestic pipe sales increased $52.1 million or 10.6% to $543.6 million. Allied & Other sales increased $24.2 million or 12.0% to $226.6 million. These increases were driven by strong performance in both the U.S. construction and agriculture end markets. International net sales decreased $13.5 million or 13.4% to $87.1 million as compared to $100.6 million in the prior year, driven primarily by a decrease in Mexico sales. Infiltrator Water Technologies contributed an additional $64.9 million to net sales.

Gross profit decreased $110.7 million to $84.4 million due to the $168.6 million ESOP compensation expense described above. Excluding the one-time ESOP compensation, gross profit increased $57.9 million or 29.7%, primarily due to an increase in both pipe and allied product sales as well as favorable pricing and material cost. This was partially offset by unfavorable inventory absorption cost due to retention of key manufacturing employees during the fourth quarter of fiscal 2019 despite lower production volume. Infiltrator Water Technologies contributed an additional $22.5 million to gross profit.

Adjusted EBITDA (Non-GAAP) increased $51.8 million or 35.3% to $198.5 million, as compared to $146.7 million in the prior year, primarily as a result of the factors mentioned above. As a percentage of net sales, Adjusted EBITDA was 21.8% as compared to 18.5% in the prior year.

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Advanced Drainage Systems, Inc.

Results of Operations

Comparison of the Three Months ended September 30, 2019 to the Three Months ended September 30, 2018

The following table summarizes our operating results as a percentage of net sales that have been derived from our Condensed Consolidated Financial Statements for the three months ended September 30, 2019 and 2018. We believe this presentation is useful to investors in comparing historical results.

	For the Three Months Ended September 30,
	2019					2018
Consolidated Statements of Operations data:	(In thousands)					(In thousands)
Net sales	$	495,905		100.0	%	$	406,555	100.0	%
Cost of goods sold		349,381		70.5			311,182	76.5
Gross profit		146,524		29.5			95,373	23.5
Selling		29,971		6.0			24,731	6.1
General and administrative		48,030		9.7			21,584	5.3
Loss on disposal of assets and costs from exit and    disposal activities		2,004		0.4			324	0.1
Intangible amortization		9,300		1.9			1,985	0.5
Income (loss) from operations		57,219		11.5			46,749	11.5
Interest expense		52,332		10.6			4,531	1.1
Derivative loss (gains) and other expense (income), net		175		—			94	—
Income (loss) before income taxes		4,712		1.0			42,124	10.4
Income tax (benefit) expense		(3,547	)	(0.7	)		12,194	3.0
Equity in net (income) loss of unconsolidated affiliates		(203	)	—			558	0.1
Net income (loss)		8,462		1.7			29,372	7.2
Less: net income (loss) attributable to noncontrolling interest		873		0.2			702	0.2
Net income (loss) attributable to ADS	$	7,589		1.5	%	$	28,670	7.1	%

Net sales - Net sales increased by $89.4 million, of which $52.7 million represented sales from Infiltrator Water Technologies. Net sales excluding Infiltrator Water Technologies are referred to as organic sales (Non-GAAP).

	Three Months Ended
	September 30, 2019								September 30, 2018
	Net Sales			Intersegment Net Sales			Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	281,405		$	(342	)	$	281,063	$	249,380	$	—	$	249,380
Infiltrator Water Technologies		64,889			(12,189	)		52,700		—		—		—
International
International - Pipe		34,617			—			34,617		44,008		—		44,008
International - Allied Products		13,167			—			13,167		11,278		—		11,278
Total International		47,784			—			47,784		55,286		—		55,286
Allied Products & Other		114,358			—			114,358		101,889		—		101,889
Intersegment Eliminations		(12,531	)		12,531			—		—		—		—
Total Consolidated	$	495,905		$	—		$	495,905	$	406,555	$	—	$	406,555

• Pipe net sales to all customers for the three months ended September 30, 2019 increased by $32.0 million, or 12.8%, compared to the three months ended September 30, 2018. The increase was due to an increase in

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Advanced Drainage Systems, Inc.

pipe volume resulting in a $35.0 million increase in sales offset by a $1.9 million decrease as a result of price and product mix.

• Infiltrator Water Technologies net sales to all customers increased by $64.9 million. The Company acquired Infiltrator Water Technologies during the three months ended September 30, 2019 and therefore did not report any Infiltrator Water Technologies sales in the three months September 30, 2018.

• International net sales to all customers for the three months ended September 30, 2019 decreased by $7.5 million, or 13.6%, compared to the three months ended September 30, 2018. The decrease was primarily attributable to a $9.3 million decrease in International Pipe Sales, attributable to volume decreases, offset by a $1.8 million increase in International Allied Product sales.

• Allied Products & Other net sales to all customers for the three months ended September 30, 2019 increased by $12.5 million, or 12.2%, compared to the three months ended September 30, 2018. The increase was due to an increase in price and product mix of $6.7 million and an increase in sales volume of $5.0 million.

Cost of goods sold and Gross profit - Cost of goods sold increased by $38.2 million, or 12.3%, and gross profit increased by $51.2 million, or 53.6%, in the three months ended September 30, 2019 over the comparable period in the previous year. Gross profit excluding Infiltrator Water Technologies, referred to as organic gross profit (Non-GAAP), increased 31.1%.

	For the Three Months Ended September 30,
	2019			2018		$ Variance			% Variance
	(In thousands)
Pipe	$	59,103		$	38,904	$	20,199			51.9	%
International		9,247			10,560		(1,313	)		(12.4	)
Allied Products & Other		56,653			45,909		10,744			23.4
Organic gross profit		125,003			95,373		29,630			31.1
Infiltrator Water Technologies		22,499			—		22,499			100.0
Intersegment eliminations		(978	)		—		(978	)		100.0
Total gross profit	$	146,524		$	95,373	$	51,151			53.6	%

• Pipe gross profit increased primarily due to the increase in volume sold, offset by the decrease in the price and product mix of net sales discussed above. The increase in Pipe gross profit was also attributable to lower material and transportation cost, which was partially offset by higher labor and overhead costs.

• The Company acquired Infiltrator Water Technologies during the three months ended September 30, 2019 and therefore did not report any Infiltrator Water Technologies gross profit in the three months September 30, 2018.

• International gross profit decreased primarily due to the decreased sales discussed above partially offset by decreased material and transportation costs.

• Allied Products & Other gross profit increased primarily due to the increase in net sales discussed above.

Selling expenses - As a percentage of net sales, selling expenses were relatively flat at 6.0% in the three months ended September 30, 2019 compared to 6.1% in three months ended September 30, 2018.

General and administrative expenses - General and administrative expenses for the three months ended September 30, 2019 increased $26.4 million from the prior year period. The increase was primarily due to an increase of $16.5 million in transaction costs primarily related to the Acquisition, $4.8 million increase in salary, bonus and stock-based compensation expenses to support growth and $3.3 million in general and administrative expenses at Infiltrator Water Technologies.

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Advanced Drainage Systems, Inc.

Loss on disposal of assets and costs from exit and disposal activities - In the three months ended September 30, 2019, we recorded a loss on the disposal of assets and costs from exit and disposal activities of approximately $2.0 million compared to a $0.3 million loss on the disposal of property, plant and equipment from the prior year period. The increase is primarily due to $1.6 million of Acquisition related severance costs incurred at Infiltrator Water Technologies. See “Note 2. Loss on Disposal of Assets and Costs from Exit and Disposal Activities” for additional discussion.

Intangible amortization - Intangible amortization increased as a percentage of net sales primarily due the addition of intangible assets related to the Acquisition.

Interest expense - Interest expense increased $47.8 million in the three months ended September 30, 2019 compared to the same period in the previous fiscal year. The increase was primarily due to $33.2 million of the write-off of deferred financing costs and $4.2 million prepayment penalty related to the extinguishment of debt instruments. The remainder of the increase was due to increased debt levels and changes in interest rates. See “Note 11. Debt” for additional discussion.

Derivative loss (gains) and other expense (income), net - Derivative loss (gains) and other (expense) income decreased by $0.1 million for the three months ended September 30, 2019 compared to the same period in the previous fiscal year.

Income tax (benefit) expense - For the three months ended September 30, 2019 and 2018, the effective tax rates were (75.3%) and 28.9%, respectively. The effective tax rate for the three months ended September 30, 2019 and September 30, 2018 differed primarily due to the Acquisition. See “Note 13. Income Taxes” for additional information.

Equity in net (income) loss of unconsolidated affiliates - Equity in net (income) loss of unconsolidated affiliates represents our proportionate share of income or loss attributed to our unconsolidated joint venture in which we have significant influence, but not control, over operations. The Equity in net (income) loss of unconsolidated affiliates decreased by $0.8 million for the three months ended September 30, 2019 as compared to the same period in the previous fiscal year. In fiscal 2019, our proportionate share of income or loss in BaySaver was included in equity in net (income) loss of unconsolidated affiliates.

Net income (loss) attributable to noncontrolling interest - Net income attributable to noncontrolling interest increased by $0.2 million for the three months ended September 30, 2019 to a net income of $0.9 million compared to a net income of $0.7 million in the same period in the previous fiscal year.

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Advanced Drainage Systems, Inc.

Comparison of the Six Months ended September 30, 2019 to the Six Months ended September 30, 2018

The following table summarizes our operating results as a percentage of net sales that have been derived from our Condensed Consolidated Financial Statements for the six months ended September 30, 2019 and 2018. We believe this presentation is useful to investors in comparing historical results.

	For the Six Months Ended September 30,
	2019					2018
Consolidated Statements of Operations data:	(In thousands)					(In thousands)
Net sales	$	909,613		100.0	%	$	794,402		100.0	%
Cost of goods sold		656,637		72.2			599,338		75.4
Cost of goods sold - ESOP special dividend compensation		168,610		18.5			—		—
Gross profit		84,366		9.3			195,064		24.6
Selling		56,336		6.2			48,896		6.2
General and administrative		79,463		8.7			42,966		5.4
Selling, general and administrative - ESOP special dividend compensation		78,142		8.6			—		—
Loss on disposal of assets and costs from exit and    disposal activities		2,711		0.3			1,428		0.2
Intangible amortization		10,842		1.2			3,969		0.5
Income (loss) from operations		(143,128	)	(15.7	)		97,805		12.3
Interest expense		57,596		6.3			8,333		1.0
Derivative loss (gains) and other expense (income), net		79		—			(720	)	(0.1	)
Income (loss) before income taxes		(200,803	)	(22.1	)		90,192		11.4
Income tax (benefit) expense		18,823		2.1			26,478		3.3
Equity in net (income) loss of unconsolidated affiliates		(637	)	(0.1	)		691		0.1
Net income (loss)		(218,989	)	(24.1	)		63,023		7.9
Less: net income (loss) attributable to noncontrolling interest		(222	)	—			2,073		0.3
Net income (loss) attributable to ADS	$	(218,767	)	(24.1	)%	$	60,950		7.7	%

Net sales - Net sales increased by $115.2 million, of which $52.7 million represented sales from Infiltrator Water Technologies. Net sales excluding Infiltrator Water Technologies are referred to as organic sales (Non-GAAP).

	Six Months Ended
	September 30, 2019								September 30, 2018
	Net Sales			Intersegment Net Sales			Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	543,586		$	(342	)	$	543,244	$	491,450	$	—	$	491,450
Infiltrator Water Technologies		64,889			(12,189	)		52,700		—		—		—
International
International - Pipe		63,902			—			63,902		78,456		—		78,456
International - Allied Products		23,216			—			23,216		22,179		—		22,179
Total International		87,118			—			87,118		100,635		—		100,635
Allied Products & Other		226,551			—			226,551		202,317		—		202,317
Intersegment Eliminations		(12,531	)		12,531			—		—		—		—
Total Consolidated	$	909,613		$	—		$	909,613	$	794,402	$	—	$	794,402

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Advanced Drainage Systems, Inc.

• Pipe net sales to all customers for the six months ended September 30, 2019 increased by $52.1 million, or 10.6%, compared to the six months ended September 30, 2018. The increase was due to an increase in pipe volume resulting in a $53.3 million increase in sales offset by a $0.7 million decrease as a result of price and product mix.

• Infiltrator Water Technologies net sales to all customers increased by $64.9 million. The Company acquired Infiltrator Water Technologies during the six months ended September 30, 2019 and therefore did not report any Infiltrator Water Technologies sales in the six months September 30, 2018.

• International net sales to all customers for the six months ended September 30, 2019 decreased by $13.5 million, or 13.4%, compared to the six months ended September 30, 2018. International Pipe sales decreased by $14.5 million, attributable to volume decreases, offset by an increase of $1.0 million in International Allied Product Sales

• Allied Products & Other net sales to all customers for the six months ended September 30, 2019 increased by $24.2 million, or 12.0%, compared to the six months ended September 30, 2018. The increase was due to an increase in price and product mix of $13.7 million and an increase in sales volume of $10.0 million.

Cost of goods sold and Gross profit - Cost of goods sold increased by $57.3 million, or 9.6%, and gross profit decreased by $110.7 million, or 56.7% in the six months ended September 30, 2019 over the comparable period in the previous year. The decrease in gross profit was primarily due to the ESOP special dividend compensation expense from the special dividend of $168.6 million allocated to Cost of goods sold. Gross profit excluding Infiltrator Water Technologies, referred to as organic gross profit (Non-GAAP), increased 18.7%.

	For the Six Months Ended September 30,
	2019			2018		$ Variance			% Variance
	(In thousands)
Pipe	$	101,561		$	82,523	$	19,038			23.1	%
International		16,963			18,845		(1,882	)		(10.0	)
Allied Products & Other		112,931			93,696		19,235			20.5
Organic gross profit		231,455			195,064		36,391			18.7
Infiltrator Water Technologies		22,499			—		22,499			100.0
Cost of goods sold - ESOP special dividend compensation		(168,610	)		—		(168,610	)		100.0
Intersegment eliminations		(978	)		—		(978	)		100.0
Total gross profit	$	84,366		$	195,064	$	(110,698	)		(56.7	%)

• Pipe gross profit increased primarily due to the increase in volume sold, offset by the decrease in the price and product mix of net sales discussed above. The increase in Pipe gross profit was also attributable to lower material and transportation cost, which was partially offset by higher labor and overhead costs.

• The Company acquired Infiltrator Water Technologies during the six months ended September 30, 2019 and therefore did not report any Infiltrator Water Technologies gross profit in the six months September 30, 2018.

• International gross profit decreased primarily due to the decreased sales discussed above partially offset by decreased material and transportation costs.

• Allied Products & Other gross profit increased primarily due to the increase in net sales discussed above.

Selling expenses - As a percentage of net sales, selling expenses remained flat at 6.2% in the six months ended September 30, 2019 and 2018.

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Advanced Drainage Systems, Inc.

General and administrative expenses - General and administrative expenses for the six months ended September 30, 2019 increased $36.5 million from the prior year period. The increase was primarily due to an increase of $20.5 million in transaction costs primarily related to the Acquisition, $6.6 million increase in salary, bonus and stock-based compensation expenses to support growth, $3.3 million in general and administrative expenses at Infiltrator Water Technologies, $2.9 million of strategic growth and operational improvement initiatives expenses and $2.9 million of expenses related to our investigation into our consolidated joint venture.

Loss on disposal of assets and costs from exit and disposal activities - In the six months ended September 30, 2019, we recorded $2.7 million of expense related to loss on disposal of assets and costs from exit and disposal activities compared to $1.4 million in the six months ended September 30, 2018. The increase is primarily due to $1.6 million of Acquisition related severance costs. See “Note 2. Loss on Disposal of Assets and Costs from Exit and Disposal Activities” for additional discussion.

Intangible amortization - Intangible amortization increased as a percentage of net sales primarily due the addition of intangible assets related to the Acquisition.

Interest expense - Interest expense increased $49.3 million in the six months ended September 30, 2019 compared to the same period in the previous fiscal year. The increase was primarily due to $33.2 million of the write-off of deferred financing costs and $4.2 million prepayment penalty from the extinguishment of debt instruments. The remainder of the increase was due to increased debt levels and changes in interest rates. See “Note 11. Debt” for additional discussion.

Derivative losses (gains) and other expense (income), net – Derivative loss (gains) and other (expense) income, net decreased by $0.8 million for the six months ended September 30, 2019 compared to the same period in the previous fiscal year. The decrease is primarily due to changes in realized diesel fuel collars.

Income tax expense – For the six months ended September 30, 2019 and 2018, the Company had effective tax rates of (9.4)% and 29.4%, respectively. The change in the effective tax rate was primarily due to a discrete income tax event related to stock appreciation from the additional ESOP shares allocated and the Acquisition. See “Note 13. Income Taxes” for additional information.

Equity in net (income) loss of unconsolidated affiliates - Equity in net (income) loss of unconsolidated affiliates represents our proportionate share of income or loss attributed to our unconsolidated joint venture in which we have significant influence, but not control, over operations. The Equity in net (income) loss of unconsolidated affiliates increased to a $0.6 million income for the six months ended September 30, 2019 from a $0.7 million loss for the six months ended September 30, 2018. In fiscal 2019, our proportionate share of income or loss in BaySaver was included in equity in net (income) loss of unconsolidated affiliates.

Net income (loss) attributable to noncontrolling interest - Net income (loss) attributable to noncontrolling interest decreased from net income of $2.1 million for the six months ended September 30, 2018 to net loss of $0.2 million for the six months ended September 30, 2019. The change is primarily attributable to fluctuations in the profitability of ADS Mexicana.

Adjusted EBITDA and Adjusted EBITDA Margin - Adjusted EBITDA and Adjusted EBITDA Margin, which are non-GAAP financial measures, has been presented in this Quarterly Report on Form 10-Q as supplemental measures of financial performance that are not required by, or presented in accordance with GAAP. We calculate Adjusted EBITDA as net income (loss) before interest, income taxes, depreciation and amortization, stock-based compensation expense, non-cash charges and certain other expenses. We calculate Adjusted EBITDA Margin as Adjusted EBITDA divided by net sales.

Adjusted EBITDA and Adjusted EBITDA Margin are included in this Form 10-Q because they are key metrics used by management and our board of directors to assess our consolidated financial performance. Adjusted EBITDA and Adjusted EBITDA Margin are frequently used by analysts, investors and other interested parties to evaluate companies in our industry. In addition to covenant compliance and executive performance evaluations, we use Adjusted EBITDA and Adjusted EBITDA Margin to supplement GAAP measures of performance to evaluate the

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effectiveness of our consolidated business strategies, to make budgeting decisions and to compare our performance against that of other peer companies using similar measures. We use Adjusted EBITDA Margin to evaluate our ability to generate profitable sales.

Adjusted EBITDA and Adjusted EBITDA Margin are not GAAP measures of our financial performance and should not be considered as alternatives to net income as measures of financial performance or cash flows from operations or any other performance measure derived in accordance with GAAP, and it should not be construed as an inference that our future results will be unaffected by unusual or non-recurring items. Adjusted EBITDA and Adjusted EBITDA Margin contain certain other limitations, including the failure to reflect our cash expenditures, cash requirements for working capital needs, cash costs to replace assets being depreciated and amortized and interest expense, or the cash requirements necessary to service interest on principal payments on our indebtedness. In evaluating Adjusted EBITDA and Adjusted EBITDA Margin, you should be aware that in the future we will incur expenses that are the same as or similar to some of the adjustments in this presentation, such as stock-based compensation expense, derivative fair value adjustments, and foreign currency transaction losses. Management compensates for these limitations by relying on our GAAP results in addition to using Adjusted EBITDA and Adjusted EBITDA Margin supplementally. Our measures of Adjusted EBITDA and Adjusted EBITDA Margin are not necessarily comparable to other similarly titled captions of other companies due to different methods of calculation.

The following table presents a reconciliation of Adjusted EBITDA to Net income, the most comparable GAAP measure, for each of the periods indicated.

	Three Months Ended September 30,						Six Months Ended September 30,
	2019			2018			2019			2018
	(In thousands)						(In thousands)
Net income (loss)	$	8,462		$	29,372		$	(218,989	)	$	63,023
Depreciation and amortization		26,566			17,536			43,260			35,363
Interest expense		52,332			4,531			57,596			8,333
Income tax (benefit) expense		(3,547	)		12,194			18,823			26,478
EBITDA		83,813			63,633			(99,310	)		133,197
Loss on disposal of assets and costs from exit    and disposal activities		2,004			324			2,711			1,428
ESOP and stock-based compensation expense		8,657			6,180			16,082			11,760
ESOP special dividend compensation(a)		—			—			246,752			—
Transaction costs(b)		16,590			65			20,835			321
Inventory step up related to    Infiltrator Water Technologies acquisition		5,773			—			5,773			—
Strategic growth and operational    improvement initiatives(c)		701			—			2,896			—
Other adjustments(d)		626			1,319			2,721			(42	)
Adjusted EBITDA	$	118,164		$	71,521		$	198,460		$	146,664
Adjusted EBITDA Margin		23.8	%		17.6	%		21.8	%		18.5	%

(a) In the first quarter of fiscal 2020, the Company paid a special dividend of $1.00 per share. The dividend was used to pay back a portion of the ESOP loan resulting in $246.8 million in additional stock-based compensation. See “Note 9. Net Income Per Share and Stockholders’ Equity” for additional information.

(b) Represents expenses recorded related to legal, accounting and other professional fees incurred in connection with business or asset acquisitions and dispositions.

(c) Represents professional fees incurred in connection with our strategic growth and operational improvement initiatives, which include various market feasibility assessments and acquisition strategies, along with our operational improvement initiatives, which include evaluation of our manufacturing network and improvement initiatives.

(d) Includes derivative fair value adjustments, foreign currency transaction (gains) losses, the proportionate share of interest, income taxes, depreciation and amortization related to the South American Joint Venture, which is

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Advanced Drainage Systems, Inc.

accounted for under the equity method of accounting, contingent consideration remeasurement, executive retirement expense (benefit) and restatement related costs. The other adjustments in fiscal 2020 also includes expenses related to the ADS Mexicana’s investigation as described in “Note 12. Commitments and Contingencies”. The other adjustments for fiscal 2019 also includes insurance proceeds received in connection with the Company’s restatement of prior period financial statements as reflected on the Company’s Form 10-K for the fiscal year ended March 31, 2015 and the Form 10-K for the fiscal year ended March 31, 2016, as amended.

The following table presents our Adjusted EBITDA for the Company prior to the Acquisition (“Legacy ADS”), which consists of the combination of the Segment Adjusted Gross Profit for Pipe, Allied Products & Other, and International plus the portion of corporate and selling expenses which impacts Adjusted EBITDA and Infiltrator Water Technologies prior to the Acquisition (“Legacy Infiltrator Water Technologies”), which consists of the combination of the Segment adjusted gross profit for Infiltrator Water Technologies plus the portion of corporate and selling expenses which impacts Adjusted EBITDA.

	Three Months Ended September 30,						Six Months Ended September 30,
	2019			2018			2019			2018
	(In thousands)						(In thousands)
Legacy ADS Adjusted EBITDA
Pipe Adjusted Gross Profit	$	74,246		$	53,561		$	131,739		$	112,027
International Adjusted Gross Profit		10,841			12,088			20,068			21,874
Allied Products & Other Adjusted Gross Profit		57,621			47,160			114,808			96,172
Unallocated corporate and selling expenses		(48,621	)		(41,288	)		(92,232	)		(83,409	)
Legacy ADS Adjusted EBITDA	$	94,087		$	71,521		$	174,383		$	146,664
Legacy Infiltrator Water Technologies Adjusted EBITDA
Infiltrator Water Technologies Adjusted Gross Profit		30,144			—			30,144			—
Unallocated corporate and selling expenses		(5,089	)		—			(5,089	)		—
Legacy Infiltrator Water Technologies Adjusted EBITDA	$	25,055		$	—		$	25,055		$	—
Intersegment eliminations		(978	)		—			(978	)		—
Consolidated Adjusted EBITDA	$	118,164		$	71,521		$	198,460		$	146,664

 Liquidity and Capital Resources

Our primary liquidity requirements are working capital, capital expenditures, debt service, and dividend payments for our convertible preferred stock and common stock. We have historically funded, and expect to continue to fund, our operations primarily through internally generated cash flow, debt financings, equity issuance and finance and operating leases. From time to time, we may explore additional financing methods and other means to raise capital. There can be no assurance that any additional financing will be available to us on acceptable terms or at all.

As of September 30, 2019, we had $13.6 million in cash that was held by our foreign subsidiaries. We continue to evaluate our strategy regarding foreign cash, but our earnings in foreign subsidiaries still remain indefinitely reinvested.

Debt and Equity Financing Transactions

As further described below, during the second fiscal quarter ended September 30, 2019, the Company and certain of its subsidiaries entered into a series of transactions that resulted in the refinancing of the existing external borrowings of the Company with the new financings, as well as the completion of an underwritten public offering of common stock. These financing activities were effected in connection with the completion of the Acquisition of Infiltrator Water Technologies.

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Advanced Drainage Systems, Inc.

On July 29, 2019, the Company repaid in full all of its outstanding indebtedness and other obligations totaling $104.4 million under the Shelf Note Agreement by using borrowings from the Company’s existing credit facility under the PNC Credit Agreement. Concurrently with the repayment, all security interests and liens securing the Shelf Note Agreement were terminated and released, and the Shelf Note Agreement was terminated.

On July 31, 2019, the Company entered into the Base Credit Agreement with Barclays Bank PLC, as administrative agent and the several lenders from time to time party thereto, pursuant to which the Company borrowed under the Credit Agreement which borrowings were used to (i) finance the Merger Consideration for the acquisition of Infiltrator Water Technologies, (ii) repay the total outstanding amount under the existing PNC Credit Agreement, (iii) repay outstanding amounts of existing indebtedness incurred by Infiltrator Water Technologies under its outstanding credit facility in effect prior to the Acquisition, and (iv) pay certain transaction fees and expenses associated with the Acquisition and the Credit Agreement.

Thereafter, on the Acquisition Closing Date, using borrowings of the Bridge Loan Facility and Bridge Revolving Facility under the Bridge Credit Facility, the Company repaid in full all of its indebtedness and other obligations totaling $239.2 million under the PNC Credit Agreement. Concurrently with the repayment, all security interests and liens securing the PNC Credit Agreement were terminated and released and the PNC Credit Agreement was terminated.

On September 10, 2019, the Company closed the underwritten public offering of common stock (the “Common Stock Offering”) and received net proceeds of approximately $293.6 million after deducting underwriting discounts and offering expenses, the proceeds of which were used in part to repay outstanding borrowings under the Bridge Credit Facility. On September 23, 2019, the Company issued $350.0 million aggregate principal amount of its Senior Notes, the proceeds of which were used in part to repay outstanding borrowings under the Bridge Credit Facility.

On September 24, 2019, the Company entered into the Senior Secured Credit Facility that amended certain pricing and related terms under the Base Credit Agreement. In connection with the Senior Secured Credit Facility, the Company also prepaid outstanding borrowings under the Term Loan Facility of the Senior Secured Credit Facility in an aggregate principal amount of $600 million.

Working Capital and Cash Flows

As of September 30, 2019, we had $395.7 million in liquidity, including $54.2 million of cash, $341.5 million in borrowings available under our Revolving Credit Agreement, net of $8.5 million of outstanding letters of credit. We believe that our cash on hand, together with the availability of borrowings under our new Credit Agreement and other financing arrangements and cash generated from operations, will be sufficient to meet our working capital requirements, anticipated capital expenditures, scheduled principal and interest payments on our indebtedness and the dividend payment requirement for our convertible preferred stock for at least the next twelve months.

Working Capital - Working capital increased to $322.9 million as of September 30, 2019, from $260.2 million as of March 31, 2019. The increase in working capital is primarily due to the addition of Infiltrator Water Technologies working capital of $47.4 million. The increase in working capital, excluding the impact of Infiltrator Water Technologies, is due to an increase in cash and accounts receivable of $45.3 million and $42.3 million, respectively, and a decrease in current maturities of debt obligations of $19.7 million. These increases were partially offset by a decrease in Legacy ADS inventory of $55.8 million and an increase in accounts payable and other accrued liabilities of $38.7 million.

	Six Months Ended September 30,
(Amounts in thousands)	2019			2018
Net cash provided by operating activities	$	171,711		$	58,161
Net cash used in investing activities		(1,114,355	)		(18,870	)
Net cash provided by (used in) financing activities		988,137			(39,090	)

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Advanced Drainage Systems, Inc.

Operating Cash Flows - Cash flows provided by operating activities for the six months ended September 30, 2019 was $171.7 million as compared with cash provided by operating activities of $58.2 million for the six months ended September 30, 2018. Cash flows from operating activities during the six months ended September 30, 2019 was primarily impacted by changes in working capital, including accounts receivable, inventory and current liabilities.

Investing Cash Flows - During the six months ended September 30, 2019 and 2018, cash used in investing activities was $1,114.4 million and $18.9 million, respectively. The increase in cash used for investing activities was primarily due to the Acquisition of Infiltrator Water Technologies, net of cash acquired. Capital expenditures during the six months ended September 30, 2019 increased by $6.3 million compared to the same period in fiscal 2019. Our capital expenditures for the six months ended September 30, 2019 were used primarily for new equipment and facility expansions and upgrades.

Financing Cash Flows - During the six months ended September 30, 2019, cash provided by financing activities was $988.1 million due to the new Term Loan Facility, Senior Notes and common stock offering. These cash inflows were offset by the repayment of the PNC Credit Agreement and Prudential Senior Notes, the special and quarterly dividend payments of $76.3 million and payments on our finance lease obligations of $12.3 million. The table below summarizes the cash flows from the Acquisition, and the related debt and equity transactions.

(Amounts in thousands)	Sources		Uses
Bridge Loan Facility	$	1,300,000	$	—
Bridge Revolver		145,000		—
PNC Credit Agreement draw		104,429		—
Prudential Senior Notes payoff		—		(104,429	)
PNC Credit Agreement payoff		—		(239,240	)
Acquisition of Infiltrator Water Technologies,   fair value of consideration transferred		—		(1,146,526	)
Common stock offering, net of offering costs		293,648		—
Bridge Loan Facility - payment		—		(300,000	)
Proceeds from Senior Notes Issuance		350,000		—
Bridge Loan Facility - payment		—		(300,000	)
Term Loan Facility		700,000		—
Bridge Loan Facility - payment		—		(700,000	)
Debt issuance costs		—		(34,606	)
Cash to Balance Sheet		—		(68,276	)
Total	$	2,893,077	$	(2,893,077	)

During the six months ended September 30, 2018, cash used in financing activities was $39.1 million due to payments on the Prudential Senior notes, dividends paid and payments on our finance lease obligations offset by net borrowings on our PNC Credit Agreement.

Free Cash Flow and Free Cash Flow Conversion - Free cash flow is a non-GAAP financial measure that comprises cash flow from operations less capital expenditures. Free cash flow and free cash flow conversion are measures used by management and our Board of Directors to assess our ability to generate cash. Free cash flow conversion is a non-GAAP financial measure that comprises free cash flow divided by cash flow from operations. Accordingly, free cash flow and free cash flow conversion have been presented in this Quarterly Report on Form 10-Q as supplemental measures of liquidity that is not required by, or presented in accordance with GAAP, because management believes that free cash flow and free cash flow conversion provide useful information to investors and others in understanding and evaluating our ability to generate cash flow from operations after capital expenditures.

Free cash flow and free cash flow conversion are not GAAP measures of our liquidity and should not be considered as an alternative to cash flow from operating activities as a measure of liquidity or any other liquidity measure derived in accordance with GAAP. Our measures of free cash flow and free cash flow conversion are not necessarily comparable to other similarly titled captions of other companies due to different methods of calculation.

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Advanced Drainage Systems, Inc.

The following table presents a reconciliation of free cash flow and free cash flow conversion to Cash flow from operating activities, the most comparable GAAP measure, for each of the periods indicated.

	Six Months Ended September 30,
	2019			2018
	(In thousands)
Cash flow from operating activities	$	171,711		$	58,161
Capital expenditures		(25,622	)		(19,299	)
Free Cash Flow	$	146,089		$	38,862
Free Cash Flow Conversion		85.1	%		66.8	%

Capital Expenditures

Capital expenditures totaled $25.6 million and $19.3 million for the six months ended September 30, 2019 and 2018, respectively. Our capital expenditures for the six months ended September 30, 2019 were used primarily to support facility expansions, equipment replacements, our recycled resin initiatives and technology.

We currently anticipate that we will make capital expenditures of approximately $85 to $100 million in fiscal year 2020. Such capital expenditures are expected to be financed using funds generated by operations. As of September 30, 2019, there were no material contractual obligations or commitments related to these planned capital expenditures, except as disclosed in “Note 12. Commitments and Contingencies.”

Employee Stock Ownership Plan (“ESOP”)

The Company established the Advanced Drainage Systems, Inc. ESOP (the “ESOP” or the “Plan”) effective April 1, 1993 to enable eligible employees to acquire stock ownership in ADS in the form of redeemable convertible preferred shares. The Plan was funded by an existing tax-qualified profit-sharing retirement plan, as well as a 30-year term loan from ADS. Within 30 days following the repayment of the ESOP loan, which will occur no later than March 2023, the ESOP committee can direct the shares of redeemable convertible preferred stock owned by the ESOP to be converted into shares of the Company’s common stock.

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. Compensation expense is recognized based upon the average annual fair value of the shares during the period which ADS receives payments on the term loan, and the number of ESOP shares allocated to participant accounts.

As disclosed in “Note 16. Employee Benefit Plans” to the Consolidated Financial Statements included in “Item 8. Financial Statements and Supplementary Data” of our Fiscal 2019 Form 10-K, redeemable convertible preferred stock can convert to common stock upon retirement, disability, death, or vested terminations over the life of the Plan. As stated above, within 30 days following the repayment of the ESOP loan, all redeemable convertible preferred stock will be converted to common stock, which will be no later than March 2023.

The ESOP’s conversion of redeemable convertible preferred stock into common stock will have a meaningful impact on the Company’s net income, net income per share and common shares outstanding. The outstanding shares of common stock would be 29% greater after conversion.

Impact on Net Income - Following the repayment of the ESOP loan discussed above, the Company will no longer be required to apply the two-class method to determine Net income per share. In addition, the Company would not be required to recognize the fair value of ESOP deferred compensation attributable to the shares of redeemable convertible preferred shares allocated.

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Advanced Drainage Systems, Inc.

The impact of the ESOP on net income includes the fair value of ESOP deferred compensation attributable to the shares of redeemable convertible preferred stock allocated to employee ESOP accounts during the applicable period, which is a non-cash charge to our earnings and not deductible for income tax purposes.

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019			2018
	(In thousands)				(In thousands)
Net income (loss) attributable to ADS	$	7,589	$	28,670	$	(218,767	)	$	60,950
ESOP special dividend compensation		—		—		246,752			—
ESOP deferred stock-based compensation		5,486		4,368		11,070			8,389

Impact on Common Stock Outstanding - The repayment of the ESOP loan and related conversion of redeemable convertible preferred shares will have an impact on the number of common shares outstanding. As shares are converted, the number of common shares outstanding will increase.

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(Shares in millions)				(Shares in millions)
Weighted average common shares outstanding		60.2		56.9		58.9		56.8
Conversion of redeemable convertible shares		17.2		17.7		17.3		17.8

Financing Transactions

PNC Term Loans - On June 22, 2017, we entered into the PNC Credit Agreement, which amends and restates the original agreement dated as of June 12, 2013, which provided us with a $550 million revolving credit facility, which is more fully described in our Fiscal 2019 Form 10-K. On the Closing Date, using borrowings of the new Term Loan Facility the Company repaid in full all of its and its subsidiaries indebtedness and other obligations totaling $239.2 million under the PNC Credit Agreement. Concurrently with the repayment, all security interests and liens held by the Collateral Agent (as defined in the PNC Credit Agreement) securing the PNC Credit Agreement were terminated and released and the PNC Credit Agreement was terminated.

ADS Mexicana Revolving Credit Facility - The Company and ADS Mexicana entered into an Intercompany Revolving Credit Promissory Note (the “Intercompany Note”) with a capacity of $12.0 million on June 22, 2018. The Intercompany Note matures on June 22, 2022. The Intercompany Note indemnifies the ADS Mexicana joint venture partner for 49% of any unpaid borrowing. The interest rates under the Intercompany Note are determined by certain base rates or LIBOR rates plus an applicable margin based on the Leverage Ratio. As of September 30, 2019, there were no borrowings under the Intercompany Note.

Prudential Senior Notes - On June 22, 2017, we entered into the Shelf Note Agreement to provide for the issuance of secured senior notes to the Shelf Note Lenders from time to time in the aggregate principal amount of up to $175 million, which is more fully described in our Fiscal 2019 Form 10-K. On July 29, 2019, the Company repaid in full all of its and its subsidiaries indebtedness and other obligations totaling $104.4 million under the Shelf Note Agreement using borrowings from the PNC Credit Agreement as in effect as of July 29, 2019. Concurrently with the repayment, the Prudential Shelf Noteholders authorized and directed PNC Bank, National Association, in its capacity as Collateral Agent (as defined in the Shelf Note Agreement) to release the security interests and liens securing the Shelf Note Agreement and the Shelf Note Agreement was terminated.

Bridge Credit Facility – On July 31, 2019, we entered into the Base Credit Agreement with Barclays Bank PLC, as administrative agent and the several lenders from time to time party thereto. The Base Credit Agreement provides for up to $1.3 billion as a Term Loan Facility, up to $350 million as a Revolving Facility, up to $50 million as an L/C Facility and up to $50 million, as a sublimit of the Revolving Facility.

On July 31, 2019, the Company borrowed under the Base Credit Agreement which was used to (i) finance the Merger Consideration paid in connection with the closing of the acquisition of Infiltrator Water Technologies by us which occurred on July 31, 2019 (the “Merger”), (ii) and repay the total outstanding amount as of the Closing Date

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Advanced Drainage Systems, Inc.

under the PNC Credit Agreement, (iii) repay outstanding amounts of existing indebtedness incurred by Infiltrator Water Technologies under its outstanding credit facility in effect prior to the Acquisition, and (iv) pay certain transaction fees and expenses associated with the Acquisition and the Base Credit Agreement.

New Senior Secured Credit Facility - On September 24, 2019, the joint lead arrangers informed the Company that the parties had successfully completed a syndication of the remaining balance of the Bridge credit Facility. The Senior Secured Credit Facility provided for a Term Loan Facility with an initial aggregate amount of $700 million, up to $350 million as a Revolving Facility, up to $50 million as an L/C Facility and up to $50 million, as a sublimit of the Revolving Facility.

The Term Loan Facility must be repaid in equal quarterly installments commencing on January 1, 2020 and continuing on the first day of each consecutive April, July, October and January thereafter. To the extent not previously paid, all then-outstanding amounts under the Term Loan Facility are due and payable on the maturity date of the Term Loan Facility, which is seven years from the Closing Date. Borrowings under the Revolving Facility are available beginning on the Closing Date and, to the extent not previously paid, all then-outstanding amounts under the Revolving Facility are due and payable on the maturity date of the Revolving Facility, which is five years from the Closing Date.

The Senior Secured Credit Facility includes customary representations, warranties, covenants and events of default.

At the option of the Company, borrowings under the Term Loan Facility and under the Revolving Facility (subject to certain limitations) bear interest at either a base rate (as determined pursuant to the Senior Secured Credit Facility) or at a Eurocurrency Rate, based on LIBOR (as defined in the Senior Secured Credit Facility), plus the applicable margin as set forth therein from time to time. In the case of the Revolving Facility, the applicable margin is based on the Company’s consolidated senior secured net leverage ratio (as defined in the Senior Secured Credit Facility). All borrowings under the Term Loan Facility used to finance the Merger Consideration as described above initially bear interest at a Eurocurrency Rate (as defined in the Senior Secured Credit Facility).

The Company’s obligations under the Credit Agreement have been secured by granting a first priority lien on substantially all of the Company’s assets (subject to certain exceptions and limitations), and each of Stormtech, LLC, Advanced Drainage of Ohio, Inc. and Infiltrator Water Technologies, LLC (collectively the “Guarantors”) has agreed to guarantee the obligations of the Company under the Senior Secured Credit Facility and to secure the obligations thereunder by granting a first priority lien in substantially all of such Guarantor’s assets (subject to certain exceptions and limitations).

The Senior Secured Credit Facility requires, if the aggregate amount of outstanding exposure under the Revolving Facility exceeds $122.5 million at the end of any fiscal quarter, the Company to maintain a consolidated senior secured net leverage ratio (commencing with the fiscal quarter ending March 31, 2020) not to exceed 4.25 to 1.00 for any four consecutive fiscal quarter periods.

The Senior Secured Credit Facility also includes other covenants, including negative covenants that, subject to certain exceptions, limit the Company’s and its restricted subsidiaries’ (as defined in the Senior Secured Credit Facility) ability to, among other things: (i) incur additional debt, including guarantees; (ii) create liens upon any of their property; (iii) enter into any merger, consolidation or amalgamation, liquidate, wind up or dissolve, or dispose of all or substantially all of their property or business; (iv) dispose of assets; (v) pay subordinated debt; (vi) make certain investments; (vii) enter into swap agreements; (viii) engage in transactions with affiliates; (ix) engage in new lines of business; (x) modify certain material contractual obligations, organizational documents, accounting policies or fiscal year; or (xi) create or permit restrictions on the ability of any subsidiary of any Loan Party (as defined in the Senior Secured Credit Facility) to pay dividends or make distributions to the Company or any of its subsidiaries.

The Senior Secured Credit Facility also contains customary provisions requiring the following mandatory prepayments (subject to certain exceptions and limitations): (i) annual prepayments (beginning with the fiscal year ending March 31, 2021) with a percentage of excess cash flow (as defined in the Senior Secured Credit Facility); (ii) 100% of the net cash proceeds from any non-ordinary course sale of assets and certain casualty or condemnation

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Advanced Drainage Systems, Inc.

events; and (iii) 100% of the net cash proceeds of indebtedness not permitted to be incurred under the Senior Secured Credit Facility.

Issuance of Senior Notes due 2027 - On September 23, 2019, the Company issued $350.0 million aggregate principal amount of its Senior Notes, pursuant to the Indenture among the Company, the Guarantors and the Trustee. The Senior Notes are guaranteed by each of the Company’s present and future direct and indirect wholly owned domestic subsidiaries that is a guarantor under the Company's Senior Secured Credit Facility. The Senior Notes were offered and sold either to persons reasonably believed to be “qualified institutional buyers” pursuant to Rule 144A under the Securities Act or to persons outside the United States under Regulation S of the Securities Act.

Interest on the Senior Notes will be payable semi-annually in cash in arrears on March 31 and September 30 of each year, commencing on March 31, 2020, at a rate of 5.000% per annum. The Senior Notes will mature on September 30, 2027. The Company used the majority of the net proceeds from the offering of the Senior Notes for the repayment of $300.0 million of its outstanding borrowings under the Company’s Bridge Loan Facility.

The Company may redeem the Senior Notes, in whole or in part, at any time on or after September 30, 2022 at established redemption prices. At any time prior to September 30, 2022, the Company may also redeem up to 40% of the Senior Notes with net cash proceeds of certain equity offerings at a redemption price equal to 105.000% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. In addition, at any time prior to September 30, 2022, the Company may redeem the Senior Notes, in whole or in part, at a redemption price equal to 100% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date plus an applicable “make-whole” premium.

The Indenture contains customary events of default, including, among other things, payment default, failure to comply with covenants or agreements contained in the Indenture or the Senior Notes and certain provisions related to bankruptcy events. The Indenture also contains customary negative covenants.

Covenant Compliance

The Senior Secured Credit Facility requires, if the aggregate amount of outstanding exposure under the Revolving Facility exceeds $122.5 million at the end of any fiscal quarter, the Company to maintain a consolidated senior secured net leverage ratio (commencing with the fiscal quarter ending March 31, 2020) not to exceed 4.25 to 1.00 for any four consecutive fiscal quarter periods.

The Senior Secured Credit Facility also includes other covenants, including negative covenants that, subject to certain exceptions, limit the Company’s and its restricted subsidiaries’ (as defined in the Credit Agreement) ability to, among other things: (i) incur additional debt, including guarantees; (ii) create liens upon any of their property; (iii) enter into any merger, consolidation or amalgamation, liquidate, wind up or dissolve, or dispose of all or substantially all of their property or business; (iv) dispose of assets; (v) pay subordinated debt; (vi) make certain investments; (vii) enter into swap agreements; (viii) engage in transactions with affiliates; (ix) engage in new lines of business; (x) modify certain material contractual obligations, organizational documents, accounting policies or fiscal year; or (xi) create or permit restrictions on the ability of any subsidiary of any Loan Party (as defined in the Senior Secured Credit Facility) to pay dividends or make distributions to the Company or any of its subsidiaries.

The Senior Secured Credit Facility also contains customary provisions requiring the following mandatory prepayments (subject to certain exceptions and limitations): (i) annual prepayments (beginning with the fiscal year ending March 31, 2021) with a percentage of excess cash flow (as defined in the Senior Secured Credit Facility); (ii) 100% of the net cash proceeds from any non-ordinary course sale of assets and certain casualty or condemnation events; and (iii) 100% of the net cash proceeds of indebtedness not permitted to be incurred under the Senior Secured Credit Facility.

For further information, see “Note 11. Debt” to the Condensed Consolidated Financial Statements included in this Quarterly Report. We are in compliance with our debt covenants as of September 30, 2019.

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Advanced Drainage Systems, Inc.

Universal Shelf Registration Statement

On August 1, 2019, the Company filed a universal shelf Registration Statement on Form S-3 (the “Registration Statement”) with the SEC in accordance with the Securities Act of 1933, as amended, Registration Statement was declared effective on August 14, 2019. The Registration Statement registers debt securities, common stock, preferred stock, depositary shares, warrants, purchase contracts, units, subscription rights and any combination of the foregoing, for a maximum aggregate offering price of up to $500 million, which may be sold from time to time. The terms of any securities offered under the Registration Statement and intended use of proceeds will be established at the times of the offerings and will be described in prospectus supplements filed with the SEC at the times of the offerings. The Registration Statement will have a three year term from the date of effectiveness.

Common Stock Offering

On September 10, 2019, the Company issued and sold an aggregate of 10,350,000 shares of common stock, $0.01 par value per share, which included the full exercise of the underwriters’ option to purchase additional shares, at a price of $29.75 per share, before underwriting discounts and commissions. The common stock was sold pursuant to the Company’s Registration Statement and related prospectus supplement. We received proceeds of approximately $293.6 million from the issuance after deducting underwriting discounts and commissions and estimated offering expenses payable by the Company. The Company used the net proceeds for the repayment of a portion of the outstanding borrowings under the Senior Secured Credit Facility, with the remaining proceeds used for general corporate purposes.

Contractual Obligations as of September 30, 2019

	Payments Due by Period
(Amounts in thousands)	Total		Less than 1 Year		1-3 Years		3-5 Years		More than 5 Years
Contractual obligations:
Long-term debt(1)	$	1,051,963	$	6,195	$	15,015	$	14,000	$	1,016,753
Interest payments(2)		347,930		48,808		96,464		95,308		107,350
Operating leases		27,988		7,443		9,754		4,072		6,719
Finance leases		84,948		25,926		37,035		15,462		6,525
Total	$	1,512,829	$	88,372	$	158,268	$	128,842	$	1,137,347

(1) The Term Loan matures in 2026 and the Senior Notes mature in 2027.

(2) Based on applicable rates and pricing margins as of September 30, 2019.

(3) Purchase obligations include commitments with vendors to purchase raw material.

Off-Balance Sheet Arrangements

Excluding the guarantees of 50% of certain debt of our unconsolidated South American Joint Venture as further discussed in “Note 10. Related Party Transactions” to the Condensed Consolidated Financial Statements, we do not have any other off-balance sheet arrangements. As of September 30, 2019, our South American Joint Venture had approximately $12.2 million of outstanding debt subject to our guarantees. We do not believe that this guarantee will have a current or future effect on our financial condition, results of operations, liquidity, or capital resources.

Critical Accounting Policies and Estimates

With the exception of the accounting pronouncements adopted during fiscal 2020 discussed in “Note 1. Background and Summary of Significant Accounting Policies” and “Note 5. Leases,” there have been no changes in critical accounting policies from those disclosed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Fiscal 2019 Form 10-K.

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 Forward-Looking Statements

This Quarterly Report on Form 10-Q (“Form 10-Q”) includes forward-looking statements. Some of the forward-looking statements can be identified by the use of terms such as “believes,” “expects,” “may,” “will,” “would,” “should,” “could,” “seeks,” “predict,” “potential,” “continue,” “intends,” “plans,” “projects,” “estimates,” “anticipates” or other comparable terms. These forward-looking statements include all matters that are not related to present facts or current conditions or that are not historical facts. They appear in a number of places throughout this Form 10-Q and include statements regarding our intentions, beliefs or current expectations concerning, among other things, our consolidated results of operations, financial condition, liquidity, prospects, growth strategies, and the industries in which we operate and include, without limitation, statements relating to our future performance.

Forward-looking statements are subject to known and unknown risks and uncertainties, many of which are beyond our control. We caution you that forward-looking statements are not guarantees of future performance and that our actual consolidated results of operations, financial condition, liquidity and industry development may differ materially from those made in or suggested by the forward-looking statements contained in this Quarterly Report on Form 10-Q. In addition, even if our actual consolidated results of operations, financial condition, liquidity and industry development are consistent with the forward-looking statements contained in this Form 10-Q, those results or developments may not be indicative of results or developments in subsequent periods. A number of important factors could cause actual results to differ materially from those contained in or implied by the forward-looking statements, including those reflected in forward-looking statements relating to our operations and business, the risks and uncertainties discussed in this Form 10-Q (including under the headings “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations”), and those described from time to time in our other filings with the SEC. Factors that could cause actual results to differ from those reflected in forward-looking statements relating to our operations and business include:

• fluctuations in the price and availability of resins and other raw materials and our ability to pass any increased costs of raw materials on to our customers in a timely manner;

• volatility in general business and economic conditions in the markets in which we operate, including without limitation, factors relating to availability of credit, interest rates, fluctuations in capital and business and consumer confidence;

• cyclicality and seasonality of the non-residential and residential construction markets and infrastructure spending;

• the risks of increasing competition in our existing and future markets, including competition from both manufacturers of high performance thermoplastic corrugated pipe and manufacturers of products using alternative materials;

• uncertainties surrounding the integration of acquisitions and similar transactions, including the recently completed acquisition of Infiltrator Water Technologies and the integration of Infiltrator Water Technologies;

• our ability to realize the anticipated benefits from the acquisition of Infiltrator Water Technologies;

• risks that the acquisition of Infiltrator Water Technologies and related transactions may involve unexpected costs, liabilities or delays

• our ability to continue to convert current demand for concrete, steel and polyvinyl chloride (“PVC”) pipe products into demand for our high performance thermoplastic corrugated pipe and Allied Products;

• the effect of weather or seasonality;

• the loss of any of our significant customers;

• the risks of doing business internationally;

• our ability to remediate the material weakness in our internal control over financial reporting, including remediation of the control environment for our joint venture affiliate ADS Mexicana, S.A. de C.V. as described in “Item 9A. Controls and Procedures” of our Fiscal 2019 Form 10-K;

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• the risks of conducting a portion of our operations through joint ventures;

• our ability to expand into new geographic or product markets, including risks associated with new markets and products associated with our recent acquisition of Infiltrator Water Technologies; our ability to achieve the acquisition component of our growth strategy;

• the risk associated with manufacturing processes;

• our ability to manage our assets;

• the risks associated with our product warranties;

• our ability to manage our supply purchasing and customer credit policies;

• the risks associated with our self-insured programs;

• our ability to control labor costs and to attract, train and retain highly qualified employees and key personnel;

• our ability to protect our intellectual property rights;

• changes in laws and regulations, including environmental laws and regulations;

• our ability to project product mix;

• the risks associated with our current levels of indebtedness, including borrowings under our new Credit Agreement and outstanding indebtedness under our Senior Notes;

• the nature, cost and outcome of any future litigation and other legal proceedings, including any such proceedings related to our acquisition of Infiltrator Water Technologies as may be instituted against the Company and others;

• fluctuations in our effective tax rate, including from the Tax Cuts and Jobs Act of 2017;

• changes to our operating results, cash flows and financial condition attributable to the Tax Cuts and Jobs Act of 2017;

• our ability to meet future capital requirements and fund our liquidity needs;

• the risk that information may arise that would require the Company to make adjustments or revisions or to restate further the financial statements and other financial data for certain prior periods and any future periods;

• any delay in the filing of any filings with the SEC;

• the review of potential weaknesses or deficiencies in the Company’s disclosure controls and procedures, and discovering further weaknesses of which we are not currently aware or which have not been detected; and

• additional uncertainties related to accounting issues generally.

All forward-looking statements are made only as of the date of this report and we do not undertake any obligation, other than as may be required by law, to update or revise any forward-looking statements to reflect future events or developments. Comparisons of results for current and any prior periods are not intended to express any future trends, or indications of future performance, unless expressed as such, and should only be viewed as historical data.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

We are subject to various market risks, primarily related to changes in interest rates, credit, raw material supply prices and, to a lesser extent, foreign currency exchange rates. Our financial position, results of operations or cash flows may be negatively impacted in the event of adverse movements in the respective market rates or prices in each of these risk categories. Our exposure in each category is limited to those risks that arise in the normal course of business, as we do not engage in speculative, non-operating transactions. Our exposure to market risk has not

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materially changed from what we previously disclosed in Part II. Item 7A. “Quantitative and Qualitative Disclosures about Market Risk” of our Annual Report on Form 10-K for the fiscal year ended March 31, 2019.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

The Company’s Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”) are responsible for evaluating the effectiveness of our disclosure controls and procedures as defined in the Securities Exchange Act of 1934, as amended (the “Exchange Act”) rules 13a-15(e) and 15d-15(e). The Company’s disclosure controls and procedures are designed to provide reasonable assurance that the information required to be disclosed in the Company’s reports under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to management, including the Company’s CEO and CFO, as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives, and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As previously disclosed in our Fiscal 2019 Form 10-K, we concluded that our internal control over financial reporting was not effective based upon the material weakness identified as of March 31, 2019. See “Item 9A - Controls and Procedures” in our Fiscal 2019 Form 10-K. Our CEO and CFO have concluded that the material weakness previously identified in the Fiscal 2019 Form 10-K was still present as of September 30, 2019 (the “Evaluation Date”). Based on the material weakness, and the evaluation of our disclosure controls and procedures, our CEO and CFO concluded that the Company’s disclosure controls and procedures were not effective as of the Evaluation Date.

Changes in Internal Control over Financial Reporting

There were no changes in the Company’s internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act that occurred during the three months ended September 30, 2019 that has materially affected, or is reasonably likely to materially affect, internal control over financial reporting.

During the three months ended September 30, 2019, the Company completed the Acquisition of Infiltrator Water Technologies, see “Note 3. Acquisitions” for additional information on the Acquisition. the Company is currently integrating Infiltrator Water Technologies into its operations and internal control processes and, pursuant to the SEC’s guidance that a recently acquired business may be excluded from the scope of an assessment of internal control over financial reporting in the year of acquisition, the scope of its assessment of the effectiveness of its internal controls over financial reporting at March 31, 2020 will exclude Infiltrator Water Technologies to the extent not integrated into the Company’s control environment.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

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 former 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 alleged 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 appealed to the United States Court of Appeals for the Second Circuit, and on October 13, 2017 the District Court’s judgment was affirmed by the Second Circuit. On October 27, 2017, plaintiff filed a petition for rehearing with the Second Circuit. The Second Circuit denied the petition for rehearing on November 28, 2017. On November 27, 2018, the plaintiff filed with the District Court a motion for relief from final judgment and for leave to file an amended complaint, which, the defendants opposed. On July 3, 2019, the District Court denied the plaintiff’s motion. The Plaintiff did not appeal the District Court’s decision and the matter is concluded.

Please see “Note 12. Commitments and Contingencies,” of the Condensed Consolidated Financial Statements of this Quarterly Report on Form 10-Q for more information regarding legal proceedings.

Item 1A. Risk Factors

The following risk factors are related to the acquisition of Infiltrator Water Technologies and related financings. Additional important risk factors that could affect our operations and financial performance, or that could cause results or events to differ from current expectations, are described in “Part I, Item 1A — Risk Factors” of our Fiscal 2019 Form 10-K. These factors are further supplemented by those discussed in “Part II, Item 7A — Quantitative and Qualitative Disclosures about Market Risk” of our Fiscal 2019 Form 10-K and in “Part I, Item 3 — Quantitative and Qualitative Disclosures about Market Risk” and “Part II, Item 1 — Legal Proceedings” of this Quarterly Report on Form 10-Q.

We may be unable to successfully integrate our and Infiltrator Water Technologies’ businesses in order to realize the anticipated benefits of the acquisition or do so within the intended timeframe.

We will be required to devote significant management attention and resources to integrating the business practices and operations of Infiltrator Water Technologies with our business. We may be unable to realize the planned synergies from the acquisition or other benefits in the timeframe that we expect or at all. We continue to assess synergies that we may realize as a combined company, the realization of which will depend on a number of factors.

The success of the acquisition, including anticipated synergies, benefits and cost savings, will depend, in part, on our ability to successfully combine and integrate our current operations with Infiltrator Water Technologies’ business. If we experience difficulties with the integration process or other unforeseen costs, the anticipated benefits and cost savings of the acquisition may not be realized fully or at all, or may take longer to realize than expected. The integration planning and implementation process will result in significant costs and divert management attention and resources. These integration matters could have an adverse effect on our combined company for an undetermined period after completion of the acquisition. In addition, the actual cost savings of the acquisition could be less than anticipated, or otherwise offset by other factors.

Additional difficulties we may encounter as part of the integration process include the following:

• the costs of integration and compliance and the possibility that the full benefits anticipated to result from our acquisition of Infiltrator Water Technologies will not be realized;

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• any delay in the integration of management teams, strategies, operations, products and services;

• diversion of the attention of each company’s management as a result of our acquisition of Infiltrator Water Technologies;

• differences in business backgrounds, corporate cultures and management philosophies that may delay successful integration;

• the ability to retain key employees;

• the ability to create and enforce uniform standards, controls, procedures, policies and information systems;

• the challenge of integrating complex systems, technology, networks and other assets of Infiltrator Water Technologies into those of ours in a seamless manner that minimizes any adverse impact on customers, suppliers, employees and other constituencies;

• potential unknown liabilities and unforeseen increased expenses or delays associated with the acquisition, including costs to integrate Infiltrator Water Technologies beyond current estimates; and

• the disruption of, or the loss of momentum in, each company’s ongoing businesses or inconsistencies in standards, controls, procedures and policies.

Any of these factors could adversely affect each company’s ability to maintain relationships with customers, suppliers, employees and other constituencies or our ability to achieve the anticipated benefits of the acquisition or could reduce each company’s earnings or otherwise adversely affect our business and financial results after the acquisition. These risks are not limited to our acquisition of Infiltrator Water Technologies and could also apply to our future acquisitions.

Uncertainties associated with our acquisition of Infiltrator Water Technologies may cause a loss of management personnel and other key employees, which could adversely affect our future business, operations and financial results.

The acquisition of Infiltrator Water Technologies could disrupt our and Infiltrator Water Technologies’ businesses. We are dependent on the experience and industry knowledge of senior management and other key employees to execute our business plans, which could be disrupted by the unanticipated departure of any key member of our management team or employee base, as well as management or key employees of Infiltrator Water Technologies. Our and Infiltrator Water Technologies’ current and prospective employees may experience uncertainty about their roles within our company, which may have an adverse effect on the ability of each of us to attract or retain key management and other key personnel.

Accordingly, no assurance can be given that we will be able to attract or retain our and Infiltrator Water Technologies’ key management personnel and other key employees to the same extent that our companies have previously been able to attract or retain such employees. In addition, because of the specialized and technical nature of our business, our future performance is dependent on the continued service of, and on our ability to attract and retain, qualified management, engineering, technical, marketing and support personnel. Competition for such personnel is intense, and we may be unable to continue to attract or retain such personnel.

Our results after our acquisition of Infiltrator Water Technologies may suffer if we do not effectively manage our expanded operations following the acquisition.

Following our acquisition of Infiltrator Water Technologies, the size and complexity of our business will increase significantly beyond the current size of either our or Infiltrator Water Technologies’ existing business. Our future success depends, in part, upon our ability to manage this expanded business, which will pose substantial challenges for management, including challenges related to the management and monitoring of new operations and new types of manufacturing processes and products and associated increased costs and complexity. There can be no assurances that we will be successful after completion of the acquisition or that we will realize the expected benefits currently anticipated from our acquisition of Infiltrator Water Technologies.

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The business of Infiltrator Water Technologies may underperform relative to our expectations.

We may not be able to maintain the levels of revenue, earnings or operating efficiency that we and Infiltrator Water Technologies have achieved or might achieve separately. The business and financial performance of Infiltrator Water Technologies is subject to certain risks and uncertainties, including the risk of the loss of, or changes to, its relationships with its customers. We may be unable to achieve the same growth, revenues and profitability that Infiltrator Water Technologies has achieved in the past.

The unaudited pro forma financial information related to the acquisition may not accurately reflect our financial position or results of operations.

The unaudited pro forma financial information contained in “Note 3 - Acquisitions”  to the notes to our unaudited financial statements included in this Quarterly Report and the unaudited pro forma financing information included in our Current Report on Form 8-K dated August 1, 2019, was presented for illustrative purposes only and may not be an indication of what our financial position or results of operations would have been had the Merger been completed on the dates indicated. The unaudited pro forma financial information was derived from our audited and unaudited historical financial statements along with those of Infiltrator Water Technologies, and certain adjustments and assumptions were made regarding the combined company after giving effect to the Merger. The assets and liabilities of Infiltrator Water Technologies were measured at fair value based on various preliminary estimates using assumptions that Infiltrator Water Technologies’ management believed to be reasonable utilizing information currently available. The process for estimating the fair value of acquired assets and assumed liabilities requires the use of judgment in determining the appropriate assumptions and estimates. These estimates and assumptions may be revised as additional information becomes available and as additional analyses are performed. Differences between preliminary estimates in the pro forma financial information and the final acquisition accounting will occur and could have a material impact on the pro forma financial information and the combined company’s financial position and future results of operations. In addition, the assumptions used in preparing the pro forma financial information may not prove to be accurate, and other factors may affect our financial condition or results of operations following the Merger. Any potential decline in our financial condition or results of operations may cause significant variations in the trading price of our common stock following the Merger.

Our level of indebtedness could adversely affect our business, financial conditions or results of operations and prevent us from fulfilling our obligations under the agreements governing the terms of our indebtedness.

As of September 30, 2019, we had, on a consolidated basis, total indebtedness (excluding capital lease obligations) of approximately $1,052 million (excluding $8.5 million of outstanding letters of credit), excluding $341.5 million of undrawn availability under the Revolving Credit Facility portion of the Senior Secured Credit Facility. Our indebtedness could have risks. For example, it could:

• make it more difficult for us to satisfy our obligations with respect to the Senior Notes and our Senior Secured Credit Facility;

• increase our vulnerability to and compromise our flexibility to plan for, or react to, general adverse economic, industry or competitive conditions, including interest rate fluctuations, because a portion of our borrowings, will be at variable rates of interest;

• cause us to be unable to meet the financial covenants contained in our debt agreements, or to generate cash sufficient to make required debt payments, which circumstances would have the potential of accelerating the maturity of some or all of our outstanding indebtedness;

• require us to dedicate a substantial portion of our cash flow from operations to payments on our indebtedness, thereby reducing the availability of our cash flow to fund working capital, capital expenditures, acquisitions, joint ventures and investments and other general corporate purposes, that could improve our competitive position, results of operations or share price;

• require us to sell debt or equity securities or to sell some of our core assets, possibly on unfavorable terms, to meet payment obligations;

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Advanced Drainage Systems, Inc.

• expose us to the risk of increased interest rates, as certain of our borrowings are at variable rates of interest;

• increase our vulnerability to downturns or adverse changes in general economic, industry or competitive conditions and adverse changes in government regulations;

• place us at a competitive disadvantage compared to our competitors that do not have the same level of indebtedness as we do and competitors that may be in a more favorable position to access additional capital resources;

• limit our ability to execute business development and acquisition activities to support our strategies;

• limit our ability to obtain additional indebtedness or equity financing for working capital, capital expenditures, service line development, debt service requirements, acquisitions and general corporate or other purposes due to applicable financial and restrictive covenants in our debt agreements; and

• limit our ability to refinance our substantial indebtedness on more favorable terms.

We expect to pay expenses and to pay principal and interest on current and future debt from cash provided by from operating activities. Therefore, our ability to meet these payment obligations will depend on future financial performance and cash availability, which is subject in part to numerous economic, business and financial factors beyond our control. If our cash flow and capital resources are insufficient to fund our debt obligations, we may be forced to reduce or delay expansion plans and capital expenditures, limit payment of dividends, sell material assets or operations, obtain additional capital or restructure our debt.

We borrowed under our new Credit Agreement to finance our acquisition of Infiltrator Water Technologies. Any failure by us to comply with operating and financial restrictions and covenants under the Senior Secured Credit Facility could result in the accelerated maturity of debt obligations, which could materially and adversely affect our liquidity.

In connection with our acquisition of Infiltrator Water Technologies, we replaced our PNC Credit Agreement and Shelf Note Agreement with the Senior Secured Credit Facility under the new Credit Agreement, which was used to finance the acquisition of Infiltrator Water Technologies. The Credit Agreement contains numerous restrictive covenants that limit our discretion in the operation of our business, which could, in turn, have a materially adverse effect on our business, financial condition and results of operations. If we are unable to generate sufficient cash flow or otherwise obtain the funds necessary to make required repayments under the Credit Agreement, or if we fail to comply with the requirements of the covenant pertaining to limitations on our indebtedness, we could trigger an event of default under the Credit Agreement. Any default that is not cured or waived could result in the acceleration of the obligations under the Credit Agreement. Any such default which actually causes an acceleration of obligations could have a material adverse effect on our liquidity and financial condition. Additionally, the covenants in the Credit Agreement may restrict the conduct of our business, which could adversely affect our business by, among other things, limiting our ability to take advantage of financings, mergers, acquisitions and other corporate opportunities that may be beneficial to our business. Our ability to comply with covenants contained in the Credit Agreement may be affected by events beyond our control, including prevailing economic, financial and industry conditions.

The credit agreement governing our Senior Secured Credit Facility and the Indenture governing our Senior Notes each permit us and our subsidiaries to incur substantial additional indebtedness. This could exacerbate the risks associated with our substantial indebtedness.

We and our subsidiaries may be able to incur substantial additional indebtedness, including additional secured debt, in the future. Although the terms of the Indenture governing the Senior Notes offered hereby and the Credit Agreement governing our Senior Secured Credit Facility contain restrictions on the incurrence of additional indebtedness, these restrictions are subject to a number of qualifications and exceptions and the indebtedness incurred in compliance with these restrictions could be substantial. As of September 30, 2019, after giving effect to the Transactions, we would have had, on a consolidated basis, total indebtedness (excluding capital lease obligations) of $1,052 million (excluding $8.5 million of outstanding letters of credit), excluding $341.5 million of undrawn availability under the Revolving Credit Facility portion of the Senior Secured Credit Facility. In addition,

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the Indenture governing the Senior Notes allows us to issue additional notes under certain circumstances and to incur other types of indebtedness, which will also be guaranteed by the subsidiary guarantors. In addition, the Indenture does prevent us from incurring certain other liabilities that do not constitute “Indebtedness” (as defined in the Indenture). If new debt or other liabilities are added to our current debt levels, the related risks that we and our subsidiaries new face could intensify.

We may not be able to generate sufficient cash to service all of our indebtedness and may be forced to take other actions to satisfy our obligations under our indebtedness, which may not be successful.

Our ability to make scheduled payments on or to refinance our debt obligations and to fund working capital, planned capital expenditures and expansion efforts and any strategic alliances or acquisitions we may make in the future depends on our financial condition and operating performance, which are subject to prevailing economic and competitive conditions and to certain financial, business and other factors beyond our control. We may not be able to assure you that we will maintain a level of cash flows from operating activities sufficient to permit us to pay the principal, premium, if any, and interest on our debt.

If our cash flows and capital resources are insufficient to fund our debt service obligations, we may be forced to reduce or delay investments and capital expenditures, or to sell assets, seek additional capital, restructure or refinance our debt or sell assets. These alternative measures may not be successful and may not permit us to meet our scheduled debt service obligations. If our operating results and available cash are insufficient to meet our debt service obligations, we could face substantial liquidity problems and might be required to dispose of material assets or operations to meet our debt service and other obligations. We may not be able to consummate those dispositions or to obtain the proceeds sought from them, and these proceeds may not be adequate to meet any debt service obligations then due. Further, we may need to refinance all or a portion of our debt on or before maturity. Any refinancing of our debt could be at higher interest rates and may require us to comply with more onerous covenants, which could further restrict our business operations, and we cannot assure you that we will be able to refinance any of our debt on commercially reasonable terms or at all.

We may have future capital needs and may not be able to obtain additional financing on acceptable terms.

Although we believe that our current cash position and the additional committed funding available under our Senior Secured Credit Facility is sufficient for our current operations, any reductions in our available borrowing capacity, or our inability to renew or replace our debt facilities when required or when business conditions warrant, could have a material adverse effect on our business, financial condition and results of operations. The economic conditions, credit market conditions, and economic climate affecting our industry, as well as other factors, may constrain our financing abilities. Our ability to secure additional financing, if available, and to satisfy our financial obligations under indebtedness outstanding from time to time will depend upon our future operating performance, the availability of credit generally, economic conditions and financial, business and other factors, many of which are beyond our control. The market conditions and the macroeconomic conditions that affect our industry could have a material adverse effect on our ability to secure financing on favorable terms, if at all.

If financing is not available when needed, or is available on unfavorable terms, we may be unable to take advantage of business opportunities or respond to competitive pressures, any of which could have a material adverse effect on our business, financial condition and results of operations.

The agreements and instruments governing our indebtedness impose or will impose restrictions that may limit our operating and financial flexibility.

The operating and financial covenants and restrictions in each of the Credit Agreement that governs the Senior Secured Credit Facility and the Indenture that governs the Senior Notes may adversely affect our ability to finance our future operations or capital needs or engage in other business activities that may be in our interest. The agreements governing our indebtedness will restrict, subject to certain important exceptions and qualifications, our and our subsidiaries’ ability to, among other things:

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• incur additional debt or issue certain disqualified stock and preferred stock;

• create liens;

• pay dividends or distributions or redeem or repurchase equity;

• prepay subordinated debt or make certain investments;

• transfer and sell assets;

• engage in a consolidation or merger, or sell, transfer or otherwise dispose of all or substantially all of their assets;

• enter into agreements that restrict dividends, loans and other distributions from our subsidiaries; and

• enter into transactions with affiliates.

These covenants could have the effect of limiting our flexibility in planning for or reacting to changes in our business and the markets in which we compete. In addition, the agreements governing our Senior Secured Credit Facility will require us to comply with a financial maintenance covenant. Operating results below current levels or other adverse factors, including a significant increase in interest rates, could result in our being unable to comply with the financial covenant contained in the Credit Agreement. If we violate covenants under the Credit Agreement and are unable to obtain a waiver from our lenders, our indebtedness under our Senior Secured Credit Facility would be in default and could be accelerated by our lenders. Because of cross-default provisions in the agreements and instruments governing our debt, a default under one agreement or instrument could result in a default under, and the acceleration of, our other debt.

If our indebtedness is accelerated, we may not be able to repay our indebtedness or borrow sufficient funds to refinance it. Even if we are able to obtain new financing, it may not be on commercially reasonable terms, on terms that are acceptable to us, or at all. If our indebtedness is in default for any reason, our business, financial condition and results of operations could be materially and adversely affected. In addition, complying with these covenants may also cause us to take actions that are not favorable to holders of the Senior Notes and may make it more difficult for us to successfully execute our business strategy and compete against companies that are not subject to such restrictions.

Item 2.Unregistered Sale of Equity Securities

In February 2017, our Board of Directors authorized the repurchase of up to $50 million of our common stock. Repurchases of common stock will be made in accordance with applicable securities laws. We did not repurchase any shares of common stock during the three months ended September 30, 2019. As of September 30, 2019, approximately $42.1 million of common stock may be repurchased under the authorization. The stock repurchase program does not obligate us to acquire any particular amount of common stock and may be suspended or terminated at any time at our discretion.

Item 3.Defaults Upon Senior Securities

None.

Item 4.Mine Safety Disclosures

Not applicable.

Item 5.Other Information

None.

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Item 6. Exhibits

The following exhibits are filed herewith or incorporated herein by reference.

Exhibit Number	Exhibit Description
2.1	Agreement and Plan of Merger, dated as of July 31, 2019, among Advanced Drainage Systems, Inc., ADS Ocean Merger Sub. Inc., Infiltrator Water Technologies Ultimate Holdings, Inc. and 2461461 Ontario Limited, an Ontario corporation (incorporated by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K (File No. 001-36557) filed with the Securities Exchange Commission on August, 1 2019).
4.1	Indenture, dated September 23, 2019 among Advanced Drainage Systems Inc. each of the guarantors party thereto and U.S. Bank National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K (file No 001-36557) filed with the Securities Exchange Commission on September 23, 2019).
4.2	Form of 5.000% Senior Note Due 2027 (included in Exhibit 4.1) (incorporated by reference to Exhibit 4.2 to the Registrant’s Current Report on form 8-K (File No. 001-36557) filed with the Securities Exchange Commission on September 23, 2019).
10.1	Credit Agreement, dated as of July 31, 2019, by and among Advanced Drainage Systems, Inc., Barclays Bank PLC, as administrative agent, the several lenders from time to time party thereto, Barclays Bank PLC and Morgan Stanley Senior Funding, Inc., as joint lead arrangers, joint bookrunners, syndication agents and documentation agents (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 001-36557) filed with the Securities Exchange Commission on August 1, 2019.
10.2	Advanced Drainage Systems, Inc. Guarantee and Collateral Agreement (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K (File No. 001-36557) filed with the Securities Exchange Commission on August 1, 2019).
10.3	First Amendment to Credit Agreement, by and among the Advanced Drainage Systems, Inc. the banks and other financial institutions or entities parties thereto, constituting all the Lenders under the Credit Agreement, the Issuing Lenders party thereto and Barclays Bank PLC, as administrative agent (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 001-36557) filed with the Securities Exchange Commission on September 30, 2019).
31.1*	Certification of President and Chief Executive Officer of Advanced Drainage Systems, Inc. pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Executive Vice President and Chief Financial Officer of Advanced Drainage Systems, Inc. pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of Principal Executive Officer of Advanced Drainage Systems, Inc. pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2*	Certification of Principal Financial Officer of Advanced Drainage Systems, Inc. pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS*	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH*	Inline XBRL Taxonomy Extension Schema.
101.CAL*	Inline XBRL Taxonomy Extension Calculation Linkbase.
101.DEF*	Inline XBRL Taxonomy Extension Definition Linkbase.
101.LAB*	Inline XBRL Taxonomy Extension Label Linkbase.
101.PRE*	Inline XBRL Taxonomy Extension Presentation Linkbase.
104	The cover page for the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2019, has been formatted in Inline XBRL.

* Filed herewith

- 55 -

Advanced Drainage Systems, Inc.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: November 12, 2019

ADVANCED DRAINAGE SYSTEMS, INC.
By:	/s/ D. Scott Barbour
	D. Scott Barbour
	President and Chief Executive Officer
	(Principal Executive Officer)
By:	/s/ Scott A. Cottrill
	Scott A. Cottrill
	Executive Vice President, Chief Financial Officer and Secretary
	(Principal Financial Officer)
By:	/s/ Tim A. Makowski
	Tim A. Makowski
	Vice President, Controller, and Chief Accounting Officer

- 56 -

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

I, D. Scott Barbour, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q (this “Report”) of the registrant, Advanced Drainage Systems, Inc.;

2. Based on my knowledge, this Report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this Report;

3. Based on my knowledge, the financial statements and other financial information included in this Report fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this Report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this Report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this Report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this Report based on such evaluation; and

d. Disclosed in this Report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 12, 2019

By:	/s/ D. Scott Barbour
	D. Scott Barbour
	President and Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

I, Scott A. Cottrill, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q (this “Report”) of the registrant, Advanced Drainage Systems, Inc.;

2. Based on my knowledge, this Report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this Report;

3. Based on my knowledge, the financial statements and other financial information included in this Report fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this Report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this Report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this Report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this Report based on such evaluation; and

d. Disclosed in this Report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 12, 2019

By:	/s/ Scott A. Cottrill
	Scott A. Cottrill
	Executive Vice President, Chief Financial Officer and Secretary
	(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned hereby certifies, pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, and in accordance with 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in his capacity as the principal executive officer of Advanced Drainage Systems, Inc. (the “Company”), that, to the best of his knowledge, the Quarterly Report on Form 10-Q of the Company for the quarter ended September 30, 2019 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented in the financial statements included in such report.

November 12, 2019

/s/ D. Scott Barbour

D. Scott Barbour

Chief Executive Officer

(Principal Executive Officer)

The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate document. A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned hereby certifies, pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, and in accordance with 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in his capacity as the principal financial officer of Advanced Drainage Systems, Inc. (the “Company”), that, to the best of his knowledge, the Quarterly Report on Form 10-Q of the Company for the quarter ended September 30, 2019 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented in the financial statements included in such report.

November 12, 2019

/s/ Scott A. Cottrill

Scott A. Cottrill

Chief Financial Officer

(Principal Financial Officer)

The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate document. A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Business Segments Information - Schedule of Financial Information Attributable to Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Segment adjusted gross profit	$ 171,874	$ 112,809	$ 295,781	$ 230,073
Depreciation and amortization	26,566	17,536	43,260	35,363
Capital expenditures	15,899	12,425	25,622	19,299
Operating Segments [Member] | Pipe Segment [Member]
Segment Reporting Information [Line Items]
Segment adjusted gross profit	74,246	53,561	131,739	112,027
Depreciation and amortization	11,557	11,811	23,104	24,030
Capital expenditures	9,383	9,303	16,357	14,016
Operating Segments [Member] | Infiltrator Water Technologies Segment [Member]
Segment Reporting Information [Line Items]
Segment adjusted gross profit	30,144		30,144
Depreciation and amortization	1,859		1,859
Capital expenditures	3,883		3,883
Operating Segments [Member] | International Segment [Member]
Segment Reporting Information [Line Items]
Segment adjusted gross profit	10,841	12,088	20,068	21,874
Depreciation and amortization	1,590	1,524	3,097	3,021
Capital expenditures	623	816	1,877	1,808
Operating Segments [Member] | Allied Products and Other [Member]
Segment Reporting Information [Line Items]
Segment adjusted gross profit	57,621	47,160	114,808	96,172
Depreciation and amortization	11,560	4,201	15,200	8,312
Capital expenditures	2,010	$ 2,306	3,505	$ 3,475
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Segment adjusted gross profit	$ (978)		$ (978)

XML

Stock-Based Compensation (2017 Omnibus Plan) - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	May 24, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards	$ 1	$ (2)	$ (91)	$ (53)
2017 Omnibus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards, Shares	100,000		200,000
Restricted stock awards	$ 3,600		$ 6,900
Share-based compensation award description			the performance units, 50% of the award is based upon the achievement of certain levels of Return on Invested Capital for the performance period and 50% is based upon the achievement of certain levels of Free Cash Flow for the performance period.
Performance awards performance period			3 years
Number of nonqualified stock options granted			300,000
Number of stock options granted, Value			$ 2,700
2017 Omnibus Plan [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance units granted			100,000
Number of performance units granted, Value			$ 3,400
2017 Omnibus Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock approved for issuance					3,500,000

XML

Fair Value Measurement - Summary of Changes in Fair Value of Recurring Fair Value Measurements Using Unobservable Inputs (Detail) - Contingent Consideration [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance beginning	$ 57	$ 460	$ 203	$ 578
Change in fair value	40	7	40	9
Payments of contingent consideration liability	(17)	(142)	(163)	(262)
Balance ending	$ 80	$ 325	$ 80	$ 325

XML

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Financial leases, Right-of-use assets	$ 102,948	$ 11,900
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet	us-gaap:PropertyPlantAndEquipmentNet

XML

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 60,243	$ 47,910
Finished goods	188,671	216,630
Total inventories	$ 248,914	$ 264,540

XML

Debt (Tables)

6 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Long-Term Debt

Long-term debt as of the periods presented consisted of the following:

	September 30, 2019			March 31, 2019
	(In thousands)
Term Loan Facility	$	700,000		$	—
Senior Notes		350,000			—
Revolving Credit Facility		—			—
PNC Credit Agreement		—			134,400
Prudential Senior Notes		—			100,000
Equipment financing		1,963			2,427
Total		1,051,963			236,827
Unamortized debt issuance costs		(2,614	)		(2,293	)
Current maturities		(6,195	)		(25,932	)
Long-term debt obligation	$	1,043,154		$	208,602

Maturities of Long-term Debt (Excluding Interest and Deferred Financing Costs)

Maturities of long-term debt (excluding interest and deferred financing costs) as of September 30, 2019 are summarized below:

	Twelve Months Ended September 30,
(Amounts in thousands)	2020		2021		2022		2023		2024		Thereafter		Total
Principal maturities	$	6,195	$	7,931	$	7,084	$	7,000	$	7,000	$	1,016,753	$	1,051,963

XML

Inventories (Tables)

6 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories as of the periods presented consisted of the following:

	September 30, 2019		March 31, 2019
	(In thousands)
Raw materials	$	60,243	$	47,910
Finished goods		188,671		216,630
Total inventories	$	248,914	$	264,540

XML

Loss on Disposal of Assets and Costs from Exit and Disposal Activities - Summary of Loss on Disposal of Assets and Costs from Exit and Disposal Activities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Discontinued Operations And Disposal Groups [Abstract]
Accelerated depreciation		$ 430		$ 430
Plant severance		118		83
Product optimization		303		303
Other restructuring activities		171		202
Total 2018 Restructuring Plan activities		1,022		1,018
Loss (gain) on other disposals and partial disposals of property, plant and equipment	$ 444	(698)	$ 1,151	410
Acquisition related severance costs	1,560		1,560
Total loss on disposal of assets and costs from exit and disposal activities	$ 2,004	$ 324	$ 2,711	$ 1,428

XML

Acquisitions

6 Months Ended

Sep. 30, 2019

Business Combinations [Abstract]

Acquisitions

3. ACQUISITIONS

Acquisition of Infiltrator Water Technologies - On July 31, 2019 (the “Closing Date”), the Company completed its Acquisition of Infiltrator Water Technologies pursuant to an Agreement and Plan of Merger (the “Merger Agreement”) dated July 31, 2019. Infiltrator Water Technologies manufactures and sells wastewater systems for homes and provides drainage chambers for septic and storm water management. The total fair value of consideration transferred was $1,146.0 million. The Merger Agreement was funded through the new Senior Secured Credit Facilities as further described in “Note 11. Debt”. The results of operations of Infiltrator Water Technologies are included in the Condensed Consolidated Statements of Operations after July 31, 2019.

The following table summarizes the consideration transferred and the preliminary purchase price allocation of the assets acquired and liabilities assumed. The Company’s estimates and assumptions are subject to change during the measurement period (up to one year from the Closing Date), as the Company continues to finalize the valuations of assets acquired and liabilities assumed. Such finalizations may result in material changes from the preliminary purchase price allocations.

(Amounts in thousands)	Amount
Cash	$	57,375
Total current assets, excluding cash		75,847
Property, plant and equipment, net		98,860
Goodwill		567,034
Intangible assets, net		475,000
Other assets		14,366
Total current liabilities		(22,756	)
Deferred tax liabilities		(109,926	)
Other liabilities		(9,274	)
Total fair value of consideration transferred	$	1,146,526

The fair value of consideration transferred includes $6.0 million of Infiltrator Water Technologies payable to the Company and $6.6 million of Infiltrator Water Technologies receivable due from the Company.

The goodwill of $567.0 million represents the excess of consideration transferred over the fair value of assets acquired and liabilities assumed and is attributable to expected revenue synergies, as well as operating efficiencies and cost savings. The goodwill is not deductible for tax purposes and is assigned to the Infiltrator Water Technologies segment.

Of the $109.9 million of preliminary purchase price allocated to deferred tax liabilities, $59.8 million related to the step up of GAAP basis for fair market valuations, while the remaining $50.1 million were acquired deferred tax liabilities. Of the total $59.8 million, $55.7 million was attributed to intangible assets.  See “Note 13. Income Taxes” for additional information.

The purchase price excludes transaction costs. During the three and six months ended September 30, 2019, the Company incurred $16.6 million and $20.8 million, respectively, of transaction costs related to the Acquisition such as legal, accounting, valuation and other professional services. The Company estimates approximately $7.3 million of transaction costs during the six months ended September 30, 2019 were not deductible for tax purposes. These costs are included in general and administrative expenses in the Condensed Consolidated Statements of Operations and Condensed Consolidated Statements of Comprehensive Income.

The identifiable intangible assets recorded in connection with the closing of the Acquisition are based on valuations including customer relationships, patents and developed technology, and tradename and trademarks totaling $475.0 million. Customer relationships are amortized using an accelerated method over an estimated useful life of 15 years. Patents and developed technology and tradename and trademarks are on a straight-line basis over the respective useful lives of 10 and 20 years.

(Amounts in thousands)	Preliminary fair value		Estimated useful lives
Customer relationships	$	270,000	15 years
Patents and developed technology		140,000	10 years
Tradename and trademarks		65,000	20 years
Total identifiable intangible assets	$	475,000

The net sales and income before taxes of Infiltrator Water Technologies since the acquisition are included in the Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2019 were $52.7 million and $6.9 million, respectively.

The unaudited pro forma information for the three and six months ended September 30, 2019 and 2018 presented below includes the effects of the Acquisition as if it had been consummated as of April 1, 2018, with adjustments to give effect to pro forma events that are directly attributable to the Acquisition. Adjustments include those related to the amortization of acquired intangible assets, increases in interest expense due to additional borrowings incurred to finance the Acquisition, transaction costs, the elimination of transactions between the Company and Infiltrator Water Technologies and the estimated tax impacts thereof. The unaudited pro forma information does not reflect any operating efficiency or potential cost savings that could result from the consolidation of Infiltrator Water Technologies. Accordingly, the unaudited pro forma information is presented for informational purposes only and is not necessarily indicative of the actual results of the combined company if the Acquisition had occurred at the beginning of the period presented, nor is it indicative of the future results of operations.

	Three Months Ended September 30,				Six Months Ended September 30,
(Amounts in thousands)	2019		2018		2019			2018
Net sales	$	512,072	$	466,484	$	996,016		$	917,533
Net income (loss) attributable to ADS		45,494		30,374		(170,777	)		6,020

XML

Fair Value Measurement

6 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurement

7. 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 periods 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, the Company 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 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 and liabilities carried at fair value as of the periods presented were as follows:

	September 30, 2019
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Derivative assets – diesel fuel contracts	$	20	$	—	$	20	$	—
Total assets at fair value on a recurring basis	$	20	$	—	$	20	$	—
Liabilities:
Derivative liabilities – diesel fuel contracts	$	81	$	—	$	81	$	—
Total liabilities at fair value on a recurring basis	$	81	$	—	$	81	$	—

	March 31, 2019
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Derivative assets – diesel fuel contracts	$	189	$	—	$	189	$	—
Interest rate swaps		1,088		—		1,088		—
Total assets at fair value on a recurring basis	$	1,277	$	—	$	1,277	$	—
Liabilities:
Derivative liability - diesel fuel contracts	$	283	$	—	$	283	$	—
Foreign exchange contracts		60		—		60		—
Contingent consideration for acquisitions		203		—		—		203
Total liabilities at fair value on a recurring basis	$	546	$	—	$	343	$	203

For the six months ended September 30, 2019 and 2018, respectively, there were no transfers in or out of Levels 1, 2 or 3.

Valuation of Contingent Consideration for Acquisitions - The method used to price these liabilities is considered Level 3. Changes in the fair value of recurring fair value measurements using significant unobservable inputs (Level 3) for the periods presented were as follows:

	Three Months Ended September 30,						Six Months Ended September 30,
	2019			2018			2019			2018
	(In thousands)						(In thousands)
Balance at the beginning of the period	$	57		$	460		$	203		$	578
Change in fair value		40			7			40			9
Payments of contingent consideration liability		(17	)		(142	)		(163	)		(262	)
Balance at the end of the period	$	80		$	325		$	80		$	325

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 (as defined below and further discussed in “Note 11. Debt”) were $350.0 million and $355.3 million, respectively, as of September 30, 2019. The fair value of the Senior Notes was determined based on a quoted market data for the Company’s Senior Notes. The categorization of the framework used to evaluate the Senior Notes is considered Level 2.

The carrying and fair value of the Company’s Prudential Senior Notes (as defined below and further discussed in “Note 13. Debt” to the Company’s audited financial statements included in the Fiscal 2019 Form 10-K)

were zero at September 30, 2019, and $100.0 million and $98.9 million, respectively, at March 31, 2019. The fair value of the Prudential 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 debt under the Term Loan Facility and PNC Credit Agreement (as defined below), 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.

XML

Condensed Consolidated Statements of Mezzanine Equity - USD ($) shares in Thousands, $ in Thousands	Total	Redeemable Non-controlling Interest in Subsidiaries [Member]	Redeemable Convertible Preferred Stock [Member]	Deferred Compensation - Unearned ESOP Shares [Member]	Total Mezzanine Equity [Member]
Beginning Balance, Value at Mar. 31, 2018		$ 8,471	$ 291,247	$ (190,168)	$ 109,550
Beginning Balance, Shares at Mar. 31, 2018			23,300	15,219
Net income (loss)		832			832
Other comprehensive (income) loss	$ (1,975)
Redeemable convertible preferred stock dividends	(975)
Common stock dividends	(9,130)
Dividend paid to non-controlling interest holder	(735)	(335)			(335)
Allocation of ESOP shares to participants for compensation	3,597			$ 4,792	4,792
Allocation of ESOP shares to participants for Compensation, Shares				(383)
Exercise of common stock options	2,771
Restricted stock awards	(53)
Stock-based compensation expense	3,371
ESOP distribution in common stock			$ (6,130)		(6,130)
ESOP distribution in common stock, Shares			(490)
Ending Balance, Value at Sep. 30, 2018		8,968	$ 285,117	$ (185,376)	108,709
Ending Balance, Shares at Sep. 30, 2018			22,810	14,836
Beginning Balance, Value at Jun. 30, 2018		8,474	$ 287,337	$ (187,772)	108,039
Beginning Balance, Shares at Jun. 30, 2018			22,987	15,027
Net income (loss)		494			494
Other comprehensive (income) loss	2,837
Redeemable convertible preferred stock dividends	(478)
Common stock dividends	(4,585)
Allocation of ESOP shares to participants for compensation	1,972			$ 2,396	2,396
Allocation of ESOP shares to participants for Compensation, Shares				(191)
Exercise of common stock options	258
Restricted stock awards	(2)
Stock-based compensation expense	1,812
ESOP distribution in common stock			$ (2,220)		(2,220)
ESOP distribution in common stock, Shares			(177)
Ending Balance, Value at Sep. 30, 2018		$ 8,968	$ 285,117	$ (185,376)	108,709
Ending Balance, Shares at Sep. 30, 2018			22,810	14,836
Beginning Balance, Value at Mar. 31, 2019	102,322		$ 282,638	$ (180,316)	102,322
Beginning Balance, Shares at Mar. 31, 2019			22,611	14,452
Other comprehensive (income) loss	(746)
Redeemable convertible preferred stock dividends	(8,195)
Common stock dividends	(68,345)
Allocation of ESOP shares to participants for compensation	4,882			$ 6,188	6,188
Allocation of ESOP shares to participants for Compensation, Shares				(495)
ESOP special dividend compensation				$ 145,563	145,563
ESOP special dividend compensation, shares				(11,645)
Exercise of common stock options	2,225
Restricted stock awards	(91)
Stock-based compensation expense	5,012
ESOP distribution in common stock			$ (2,853)		(2,853)
ESOP distribution in common stock, Shares			(228)
Common Stock Offering, Value	293,648
Ending Balance, Value at Sep. 30, 2019	251,220		$ 279,785	$ (28,565)	251,220
Ending Balance, Shares at Sep. 30, 2019			22,383	2,312
Beginning Balance, Value at Jun. 30, 2019			$ 279,816	$ (31,659)	248,157
Beginning Balance, Shares at Jun. 30, 2019			22,385	2,559
Other comprehensive (income) loss	(2,310)
Redeemable convertible preferred stock dividends	(1,349)
Common stock dividends	(5,238)
Allocation of ESOP shares to participants for compensation	2,392			$ 3,094	3,094
Allocation of ESOP shares to participants for Compensation, Shares				(247)
Exercise of common stock options	764
Restricted stock awards	1
Stock-based compensation expense	3,171
ESOP distribution in common stock			$ (31)		(31)
ESOP distribution in common stock, Shares			(2)
Common Stock Offering, Value	293,648
Ending Balance, Value at Sep. 30, 2019	$ 251,220		$ 279,785	$ (28,565)	$ 251,220
Ending Balance, Shares at Sep. 30, 2019			22,383	2,312

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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Allowance for doubtful accounts	$ 5,939	$ 7,653
Unamortized debt issuance costs	$ 2,614	$ 2,293
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	68,262,000	57,490,000
Common stock, shares outstanding	68,262,000	57,490,000
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	22,383,000	22,611,000

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Acquisitions (Tables) - IWT [Member]

6 Months Ended

Sep. 30, 2019

Business Acquisition [Line Items]

Summary of Consideration Transferred and Preliminary Purchase Price Allocation of Assets Acquired and Liabilities Assumed

The following table summarizes the consideration transferred and the preliminary purchase price allocation of the assets acquired and liabilities assumed.

(Amounts in thousands)	Amount
Cash	$	57,375
Total current assets, excluding cash		75,847
Property, plant and equipment, net		98,860
Goodwill		567,034
Intangible assets, net		475,000
Other assets		14,366
Total current liabilities		(22,756	)
Deferred tax liabilities		(109,926	)
Other liabilities		(9,274	)
Total fair value of consideration transferred	$	1,146,526

Summary of Identifiable Intangible Assets

The identifiable intangible assets recorded in connection with the closing of the Acquisition are based on valuations including customer relationships, patents and developed technology, and tradename and trademarks totaling $475.0 million. Customer relationships are amortized using an accelerated method over an estimated useful life of 15 years. Patents and developed technology and tradename and trademarks are on a straight-line basis over the respective useful lives of 10 and 20 years.

(Amounts in thousands)	Preliminary fair value		Estimated useful lives
Customer relationships	$	270,000	15 years
Patents and developed technology		140,000	10 years
Tradename and trademarks		65,000	20 years
Total identifiable intangible assets	$	475,000

Summary of Unaudited Pro Forma Information

The unaudited pro forma information for the three and six months ended September 30, 2019 and 2018 presented below includes the effects of the Acquisition as if it had been consummated as of April 1, 2018, with adjustments to give effect to pro forma events that are directly attributable to the Acquisition.

	Three Months Ended September 30,				Six Months Ended September 30,
(Amounts in thousands)	2019		2018		2019			2018
Net sales	$	512,072	$	466,484	$	996,016		$	917,533
Net income (loss) attributable to ADS		45,494		30,374		(170,777	)		6,020

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Debt

6 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Debt

11. DEBT

Long-term debt as of the periods presented consisted of the following:

	September 30, 2019			March 31, 2019
	(In thousands)
Term Loan Facility	$	700,000		$	—
Senior Notes		350,000			—
Revolving Credit Facility		—			—
PNC Credit Agreement		—			134,400
Prudential Senior Notes		—			100,000
Equipment financing		1,963			2,427
Total		1,051,963			236,827
Unamortized debt issuance costs		(2,614	)		(2,293	)
Current maturities		(6,195	)		(25,932	)
Long-term debt obligation	$	1,043,154		$	208,602

Bridge Credit Facility

On July 31, 2019, the Company entered into a credit agreement (the “Base Credit Agreement”) by and among the Company, as borrower, Barclays Bank PLC, as administrative agent, the several lenders from time to time party thereto.

The Base Credit Agreement provided for a term loan facility in an initial aggregate principal amount of up to $1.3 billion (the “Bridge Loan Facility”), a revolving credit facility in an initial aggregate principal amount of up to $350 million (the “Bridge Revolving Credit Facility”), a letter of credit sub-facility in the initial aggregate available amount of up to $50 million, as a sublimit of such Revolving Credit Facility (the “Bridge L/C Facility”) and a swing line sub-facility in the aggregate available amount of up to $50 million, as a sublimit of the Revolving Credit Facility (together with the Bridge Loan Facility, the Bridge Revolving Credit Facility and the Bridge L/C Facility, the “Bridge Credit Facility”).

On July 31, 2019, the Company borrowed approximately $1.3 billion under the Bridge Loan Facility and $145 million under the Bridge Revolving Credit Facility, which amounts were to (i) finance the consideration paid in connection with the closing of the Acquisition, (ii) repay the total outstanding amount as of the Closing Date under the Company’s then existing revolving credit facility with PNC, (iii) repay outstanding amounts of existing indebtedness incurred by Infiltrator Water Technologies under its outstanding credit facility in effect prior to the Acquisition, and (iv) pay certain transaction fees and expenses associated with the Acquisition and the Bridge Loan Facility. Approximately $300.0 million of outstanding borrowings under the Base Credit Agreement were repaid on September 10, 2019 with proceeds from the Company’s public offering of common stock as further described in “Note 9, Net Income Per Share and Stockholders’ Equity” and approximately $300.0 million of outstanding borrowings under the Bridge Loan Facility were repaid on September 23, 2019 with proceeds from the Company’s offering of $350.0 million Senior Notes, as defined and further described below.

As a result of this borrowing, on July 31, 2019, the Company initially capitalized approximately $46.9 million of deferred financing fees associated with the Bridge Credit Facility. This amount was later reduced by $14.9 million due to refunds received by ADS. The remaining deferred financing costs were written off due to loss on early extinguishment of debt resulting from the $300.0 million principal payment primarily from the Common Stock Offering, $300.0 million principal payment from the issuance of Senior Notes due 2027, and $700 million principal payment from the issuance of the Senior Secured Credit Facility on September 24, 2019. These financings resulted in the Company treating the Bridge Credit Facility as having been extinguished and replaced with the Common Stock Offering, Senior Notes due 2027 and the syndicated Senior Secured Credit Facility for accounting purposes under ASC 470-50. The loss on early extinguishment of debt, which is included in interest expense in the Company's Condensed Consolidated Statements of Operations, primarily reflects the write-off of unamortized debt issuance costs and discounts.

Repayment of Prudential Senior Notes

On July 29, 2019, the Company repaid in full all of its and its subsidiaries’ indebtedness and other obligations totaling $104.4 million under that certain Second Amended and Restated Private Shelf Agreement, dated as of June 22, 2017 (as amended the “Shelf Note Agreement”) of the Company’s Senior Notes (“Prudential Senior Notes”), by and among the Company, as issuer, the guarantors from time to time a party thereto, PGIM, Inc., as a purchaser and the other purchasers from time to time a party thereto. The Company repaid the outstanding indebtedness under the Shelf Note Agreement using borrowings from the Company’s Second Amended and Restated Credit Agreement (the “PNC Credit Agreement”) as in effect as of July 29, 2019. Concurrently with the repayment, the Shelf Noteholders authorized and directed PNC Bank, National Association, in its capacity as Collateral Agent (as defined in the Shelf Note Agreement) to release the security interests and liens securing the Shelf Note Agreement and the Shelf Note Agreement was terminated.

As a result of the repayment described above, the Company expensed approximately $4.2 million primarily consisting of prepayment premiums associated with the debt payoff activity and the write-off of unamortized deferred financing fees, as the payoff meets the criteria to be accounted for as a debt extinguishment.

Repayment of PNC Credit Agreement

On the Closing Date, using borrowings of the new Bridge Loan Facility the Company repaid in full all of its and its subsidiaries indebtedness and other obligations totaling $239.2 million under the PNC Credit Agreement. Concurrently with the repayment, all security interests and liens held by the Collateral Agent (as defined in the PNC Credit Agreement) securing the PNC Credit Agreement were terminated and released and the PNC Credit Agreement was terminated.

As a result of the repayment described above, the Company expensed approximately $2.0 million primarily consisting of the write-off of unamortized deferred financing fees associated with the debt payoff activity, as the payoff meets the criteria to be accounted for as a debt extinguishment.

Letters of credit outstanding at March 31, 2019 amounted to $8.5 million, and reduced the availability of the revolving credit facilities under the PNC Credit Agreement with PNC Bank, National Association, as administrative agent and various financial institutions thereto at March 31, 2019.

Issuance of Senior Notes due 2027

On September 23, 2019, the Company issued $350.0 million aggregate principal amount of 5.0% senior notes due 2027 (the “Senior Notes”) pursuant to an Indenture, dated September 23, 2019 (the “Indenture”), among the Company, the guarantors party thereto (the “Guarantors”) and U.S. Bank National Association, as Trustee (the “Trustee”). The Senior Notes are guaranteed by each of the Company’s present and future direct and indirect wholly owned domestic subsidiaries that is a guarantor under the Company's Senior Secured Credit Facility. The Senior Notes were offered and sold either to persons reasonably believed to be “qualified institutional buyers” pursuant to Rule 144A under the Securities Act of 1933 (the “Securities Act”) or to persons outside the United States under Regulation S of the Securities Act.

Interest on the Senior Notes will be payable semi-annually in cash in arrears on March 31 and September 30 of each year, commencing on March 31, 2020, at a rate of 5.0% per annum. The Senior Notes will mature on September 30, 2027. The Company used the majority of the net proceeds from the offering of the Senior Notes for the repayment of $300.0 million of its outstanding borrowings under the Company’s Bridge Loan Facility. The deferred financing costs associated with the Senior Notes totaled $2.1 million as of September 30, 2019 and are recorded as a direct reduction from the carrying amount of the related debt.

The Company may redeem the Senior Notes, in whole or in part, at any time on or after September 30, 2022 at established redemption prices. At any time prior to September 30, 2022, the Company may also redeem up to 40% of the Senior Notes with net cash proceeds of certain equity offerings at a redemption price equal to 105.0% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. In addition, at any time prior to September 30, 2022, the Company may redeem the Senior Notes, in whole or in part, at a redemption price equal to 100% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date plus an applicable “make-whole” premium.

The Indenture contains customary events of default, including, among other things, payment default, failure to comply with covenants or agreements contained in the Indenture or the Senior Notes and certain provisions related to bankruptcy events. The Indenture also contains customary negative covenants.

New Senior Secured Credit Facility

On September 24, 2019, the Company successfully completed a $700 million syndication of the remaining balance of the Bridge Credit Facility subsequent to the aforementioned Common Stock Offering and Senior Notes due 2027 and in connection with the syndication, the Company amended the Base Credit Agreement (the “Senior Secured Credit Facility”). The Senior Secured Credit Facility reduced the applicable margin utilized in the determination of the interest rate, as well as other provisions.

The Senior Secured Credit Facility provides for a term loan facility in an initial aggregate principal amount of $700 million (the “Term Loan Facility”), a revolving credit facility in an initial aggregate principal amount of up to $350 million (the “Revolving Credit Facility”), a letter of credit sub-facility in the initial aggregate available amount of up to $50 million, as a sublimit of such Revolving Credit Facility (the “L/C Facility”) and a swing line sub-facility in the aggregate available amount of up to $50 million, as a sublimit of the Revolving Credit Facility (together with the Term Loan Facility, the Revolving Credit Facility and the L/C Facility, the “Senior Secured Credit Facility”). Letters of credit outstanding at September 30, 2019 amounts to $8.5 million and reduced the availability of the Revolving Credit Facility.

In connection with entering into the Senior Secured Credit Facility, the Company capitalized approximately $0.4 million in deferred financing fees. To the extent not previously paid, all then-outstanding amounts under the Term Loan Facility are due and payable on the maturity date of the Term Loan Facility, which is seven years from the Closing Date. Borrowings under the Revolving Credit Facility are available beginning on September 24, 2019 and, to the extent not previously paid, all then-outstanding amounts under the Revolving Credit Facility are due and payable on the maturity date of the Revolving Credit Facility, which is five years from the Closing Date.

At the option of the Company, borrowings under the Term Loan Facility and under the Revolving Credit Facility (subject to certain limitations) bear interest at either a base rate (as determined pursuant to the Senior Secured Credit Facility) or at a Eurocurrency Rate, based on LIBOR (as defined in the Senior Secured Credit Facility), plus the applicable margin as set forth therein from time to time. In the case of the Revolving Credit Facility, the applicable margin is based on the Company’s consolidated senior secured net leverage ratio (as defined in the Senior Secured Credit Facility). All borrowings under the Term Loan Facility used to finance the Merger Consideration as described above initially bear interest at a Eurocurrency Rate applicable to Eurocurrency Loans (as defined in the Senior Secured Credit Facility) denominated in U.S. Dollars.

The Company is also required to pay a commitment fee that is based upon the undrawn amounts of the Revolving Credit Facility at a rate per annum based upon a calculated ratio as prescribed within the Senior Secured Credit Facility. As of September 30, 2019, the rate the Company was committed to paying on the undrawn portion was equal to 0.2%.

The Company’s obligations under the Senior Secured Credit Facility have been secured by granting a first priority lien on substantially all of the Company’s assets (subject to certain exceptions and limitations), and each of Stormtech, LLC, Advanced Drainage of Ohio, Inc. and Infiltrator Water Technologies, LLC (collectively the “Guarantors”) has agreed to guarantee the obligations of the Company under the Senior Secured Credit Facility and to secure the obligations thereunder by granting a first priority lien in substantially all of such Guarantor’s assets (subject to certain exceptions and limitations).

Principal Maturities – Maturities of long-term debt (excluding interest and deferred financing costs) as of September 30, 2019 are summarized below:

	Twelve Months Ended September 30,
(Amounts in thousands)	2020		2021		2022		2023		2024		Thereafter		Total
Principal maturities	$	6,195	$	7,931	$	7,084	$	7,000	$	7,000	$	1,016,753	$	1,051,963

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Business Segments Information

6 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Business Segments Information

15. BUSINESS SEGMENTS INFORMATION

Following the Acquisition of Infiltrator Water Technologies, the Company revised its reportable segments to reflect how the Chief Operating Decision Maker (“CODM”) currently reviews financial information and makes operational decisions.  After the Acquisition, ADS operates its business in three distinct reportable segments: “Pipe”, “International” and “Infiltrator Water Technologies.” “Allied Products & Other” represents the Company’s Allied Products and all other business segments. “Pipe” and “Allied Products & Other” were previously included as Domestic. With the change in reportable segments, the CODM is now evaluating segment reporting based on Net Sales and Segment Adjusted Gross Profit. The Company calculated Segment Adjusted Gross Profit as net sales less costs of goods sold, depreciation and amortization, stock-based compensation and non-cash charges. A measure of assets is not applicable, as segment assets are not regularly reviewed by the CODM for evaluating performance or allocating resources. The prior period segment results and related disclosures have been recast to conform to the current year presentation.

Pipe – The Pipe segment manufactures and markets high performance thermoplastic corrugated pipe 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, buying groups and co-ops, major national retailers as well as an extensive network of hundreds of small to medium-sized distributors across the U.S.

Products include single wall pipe, N-12 HDPE pipe sold into the Storm sewer, Infrastructure and Agriculture markets, High Performance polypropylene pipe sold into the Storm sewer, Infrastructure and sanitary sewer markets. Products are designed primarily for storm water management in the construction and infrastructure marketplace across a broad range of end markets and applications, including non-residential, residential, agriculture and infrastructure. Products are manufactured using HDPE and polypropylene plastic material.

Infiltrator Water Technologies – Infiltrator Water Technologies is a leading national provider of plastic leach field chambers and systems, septic tanks and accessories, primarily for use in residential applications. Infiltrator Water Technologies products are used in on-site septic wastewater treatment systems in the United States and Canada.

International – The International segment manufactures and markets pipe and allied products in certain regions outside of the United States, including Company owned facilities in Canada, subsidiaries that distribute to Europe and the Middle East, exports and through the Company’s joint ventures with local partners in Mexico and South America. 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 lines include single wall pipe, N-12 HDPE pipe, high performance PP pipe and certain geographies also sell our broad line of Allied Products.

Allied Products & Other – Allied Products and Other manufactures and markets products throughout the United States. Products include StormTech, Nyloplast, ARC Septic Chambers, Inserta Tee, BaySaver filters and water quality structures, Fittings, and FleXstorm. 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.

The following table sets forth reportable segment information with respect to the amount of Net sales contributed by each class of similar products for the periods presented:

	Three Months Ended
	September 30, 2019								September 30, 2018
	Net Sales			Intersegment Net Sales			Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	281,405		$	(342	)	$	281,063	$	249,380	$	—	$	249,380
Infiltrator Water Technologies		64,889			(12,189	)		52,700		—		—		—
International
International - Pipe		34,617			—			34,617		44,008		—		44,008
International - Allied Products		13,167			—			13,167		11,278		—		11,278
Total International		47,784			—			47,784		55,286		—		55,286
Allied Products & Other		114,358			—			114,358		101,889		—		101,889
Intersegment Eliminations		(12,531	)		12,531			—		—		—		—
Total Consolidated	$	495,905		$	—		$	495,905	$	406,555	$	—	$	406,555
	Six Months Ended
	September 30, 2019								September 30, 2018
	Net Sales			Intersegment Net Sales			Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	543,586		$	(342	)	$	543,244	$	491,450	$	—	$	491,450
Infiltrator Water Technologies		64,889			(12,189	)		52,700		—		—		—
International
International - Pipe		63,902			—			63,902		78,456		—		78,456
International - Allied Products		23,216			—			23,216		22,179		—		22,179
Total International		87,118			—			87,118		100,635		—		100,635
Allied Products & Other		226,551			—			226,551		202,317		—		202,317
Intersegment Eliminations		(12,531	)		12,531			—		—		—		—
Total Consolidated	$	909,613		$	—		$	909,613	$	794,402	$	—	$	794,402

The following sets forth certain financial information attributable to the reportable segments for the periods presented.

	Three Months Ended September 30,					Six Months Ended September 30,
	2019			2018		2019			2018
	(In thousands)					(In thousands)
Segment adjusted gross profit
Pipe	$	74,246		$	53,561	$	131,739		$	112,027
Infiltrator Water Technologies		30,144			—		30,144			—
International		10,841			12,088		20,068			21,874
Allied Products & Other		57,621			47,160		114,808			96,172
Intersegment Elimination		(978	)		—		(978	)		—
Total	$	171,874		$	112,809	$	295,781		$	230,073
Depreciation and amortization
Pipe	$	11,557		$	11,811	$	23,104		$	24,030
Infiltrator Water Technologies		1,859			—		1,859			—
International		1,590			1,524		3,097			3,021
Allied Products & Other(a)		11,560			4,201		15,200			8,312
Total	$	26,566		$	17,536	$	43,260		$	35,363
Capital expenditures
Pipe	$	9,383		$	9,303	$	16,357		$	14,016
Infiltrator Water Technologies		3,883			—		3,883			—
International		623			816		1,877			1,808
Allied Products & Other(a)		2,010			2,306		3,505			3,475
Total	$	15,899		$	12,425	$	25,622		$	19,299

(a) Includes depreciation and amortization and capital expenditures not allocated to a reportable segment.

Reconciliation of Gross Profit to Segment Adjusted Gross profit

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Reconciliation of Segment Adjusted Gross Profit:
Total Gross Profit	$	146,524	$	95,373	$	84,366	$	195,064
Depreciation and amortization		15,708		14,354		29,392		29,072
ESOP and stock-based compensation expense		3,869		3,082		7,640		5,937
ESOP special dividend compensation		—		—		168,610		—
Inventory step up related to    Infiltrator Water Technologies acquisition		5,773		—		5,773		—
Total Segment Adjusted Gross Profit	$	171,874	$	112,809	$	295,781	$	230,073

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Related Party Transactions - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
South American Joint Venture [Member]
Related Party Transaction [Line Items]
Maximum borrowings permitted under credit facility	$ 22,000,000.0		$ 22,000,000.0
Debt, expiration date			Dec. 31, 2020
Percentage of debt guarantee			50.00%
Company's ownership percentage	50.00%		50.00%
Maximum potential payment under guarantee	$ 11,000,000.0		$ 11,000,000.0
Outstanding principal balance including letters of credit	11,200,000		11,200,000		$ 12,300,000
Sales with related parties	100,000	$ 0	500,000	$ 600,000
Sale with joint ventures	100,000	400,000	400,000	600,000
South American Joint Venture [Member] | US Dollar Denominated Loans [Member]
Related Party Transaction [Line Items]
Outstanding principal balance including letters of credit	$ 0		$ 0
South American Joint Venture [Member] | Chilean Peso Denominated Loans [Member]
Related Party Transaction [Line Items]
Weighted average interest rate	5.30%		5.30%
Tigre-ADS USA [Member]
Related Party Transaction [Line Items]
Purchases from related party	$ 600,000	$ 700,000	$ 1,200,000	$ 1,200,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Related Party Transaction [Line Items]
Maximum borrowings permitted under credit facility	12,000,000.0		$ 12,000,000.0
Revolving credit facility maturity date			Jun. 22, 2018
Debt, expiration date			Jun. 22, 2022
Outstanding principal balance including letters of credit	$ 0		$ 0
ADS Mexicana [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Related Party Transaction [Line Items]
Percentage of ownership in joint venture	49.00%		49.00%
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | ADS Mexicana [Member]
Related Party Transaction [Line Items]
Company's ownership percentage	51.00%		51.00%

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Debt (Repayment of PNC Credit Agreement) - Additional Information (Detail) - USD ($) $ in Thousands		6 Months Ended
	Jul. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
Debt Instrument [Line Items]
Write-off of unamortized deferred financing fees		$ 34,285	$ 387
PNC Credit Facility [Member]
Debt Instrument [Line Items]
Repayments of debt	$ 239,200
Write-off of unamortized deferred financing fees	$ 2,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Letters of credit outstanding		$ 8,500		$ 8,500

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Acquisitions - Summary of unaudited pro forma information (Detail) - IWT [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Net sales	$ 512,072	$ 466,484	$ 996,016	$ 917,533
Net income (loss) attributable to ADS	$ 45,494	$ 30,374	$ (170,777)	$ 6,020

XML

Loss on Disposal of Assets and Costs from Exit and Disposal Activities - Schedule of Reconciliation of Restructuring Liability (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expenses	$ 1,022		$ 1,018
2018 Restructuring Plan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Balance at the beginning of the period		$ 1,696	3,901
Expenses			214
Non-cash expenses			59
Payments		(842)	(1,867)
Balance at the end of the period	$ 2,307	$ 854	$ 2,307

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Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 2,616
Operating cash flows from finance leases	2,434
Financing cash flows from finance leases	12,375	$ 11,619
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	4,774
Finance leases	$ 1,469

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Commitments and Contingencies

6 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

12. 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 non-cancelable purchase contracts in place at September 30, 2019, the Company has agreed to purchase resin over the period October 2019 through December 2019 at a committed purchase cost of $5.9 million.

The Company enters into equipment purchase contracts with manufacturers. Under such non-cancelable purchase contracts in place at September 30, 2019, the Company has agreed to purchase equipment to be delivered in fourth quarter of fiscal 2020 at a committed purchase cost of $1.4 million.

Litigation and Other Proceedings – 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 former 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 alleged 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 appealed to the United States Court of Appeals for the Second Circuit, and on October 13, 2017 the District Court’s judgment was affirmed by the Second Circuit. On October 27, 2017, plaintiff filed a petition for rehearing with the Second Circuit. The Second Circuit denied the petition for rehearing on November 28, 2017. On November 27, 2018, the plaintiff filed with the District Court a motion for relief from final judgment and for leave to file an amended complaint, which, the defendants opposed. On July 3, 2019, the District Court denied the plaintiff’s motion. The Plaintiff did not appeal the District Court’s decision and the matter is concluded.

The Company is involved from time to time in various legal proceedings that arise in the ordinary course of 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 the Company’s financial position or results of operations. The Company records a liability when a loss is considered probable, and the amount can be reasonably estimated.

Other Commitments and Contingencies

In March 2019, the Company initiated an internal investigation process, under the guidelines of the Company’s Code of Business Conduct and Ethics, into its consolidated joint venture affiliate ADS Mexicana’s senior management’s ethical and business conduct, as well as compliance of certain products with, along with considerations into, Mexican laws and regulations over the previous 12 months. The Company has recorded an accrual for the current estimate of probable losses resulting from the investigation which is not material to our Condensed Consolidated Financial Statements. However due to the inherent uncertainties in determining the use, installation application and location of our ADS Mexicana products sold, along with the consideration of Mexican laws and regulations related to warranty and product liability obligations, the Company is unable to determine the maximum potential future losses that may occur, which could be material to the Condensed Consolidated Financial Statements.

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Subsequent Events

6 Months Ended

Sep. 30, 2019

Subsequent Events [Abstract]

Subsequent Events

16. SUBSEQUENT EVENTS

Common Stock Dividend - During the third quarter of fiscal 2020, the Company declared a quarterly cash dividend of $0.09 per share of common stock. The dividend is payable on December 13, 2019 to stockholders of record at the close of business on November 29, 2019.

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Revenue Recognition (Tables)

6 Months Ended

Sep. 30, 2019

Revenue From Contract With Customer [Abstract]

Schedule of Contract Asset and Liability

The following table presents the balance of the Company’s contract asset and liability as of September 30, 2019 and March 31, 2019:

	September 30, 2019		March 31, 2019
	(In thousands)
Contract asset - product returns	$	1,069	$	646
Refund liability		2,429		1,372

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Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Debt Instrument [Line Items]
Total	$ 1,051,963	$ 236,827
Unamortized debt issuance costs	(2,614)	(2,293)
Current maturities	(6,195)	(25,932)
Long-term debt obligation	1,043,154	208,602
Term Loan Facility [Member]
Debt Instrument [Line Items]
Revolving Credit Facility	700,000
Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes	350,000
PNC Credit Agreement [Member]
Debt Instrument [Line Items]
Revolving Credit Facility		134,400
Equipment Financing [Member]
Debt Instrument [Line Items]
Revolving Credit Facility	$ 1,963	2,427
Prudential Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes		$ 100,000

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Debt (Issuance of Senior Notes due 2027) - Additional Information (Detail) - USD ($) $ in Thousands		6 Months Ended
	Sep. 23, 2019	Sep. 30, 2019	Jul. 31, 2019
Debt Instrument [Line Items]
Repayment of notes		$ 1,300,000
Bridge Loan Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount			$ 1,300,000
Repayment of notes	$ 300,000
5.0% Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Aggregate principal amount	$ 350,000
Debt instrument, interest rate	5.00%	5.00%
Debt instrument, description of payment terms		Interest on the Senior Notes will be payable semi-annually in cash in arrears on March 31 and September 30 of each year, commencing on March 31, 2020, at a rate of 5.0% per annum.
Debt instrument, frequency of periodic payment		semi-annually
Debt instrument, date of first required payment	Mar. 31, 2020
Debt instrument, maturity date	Sep. 30, 2027
Deferred financing costs		$ 2,100
5.0% Senior Notes due 2027 [Member] | Prior to September 30, 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed		105.00%
Debt instrument, redemption price, percentage of principal amount redeemed excluding "make-whole" premium		100.00%
5.0% Senior Notes due 2027 [Member] | Maximum [Member] | Prior to September 30, 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		40.00%
5.0% Senior Notes due 2027 [Member] | Bridge Loan Facility [Member]
Debt Instrument [Line Items]
Repayment of notes	$ 300,000

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Leases - Schedule of Components of Lease Cost (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Operating lease cost
Short-term lease cost	$ 588	$ 1,324
Total operating lease cost	2,166	3,940
Finance lease cost
Total finance lease cost	6,874	12,943
Cost of Goods Sold [Member]
Operating lease cost
Operating lease cost	1,179	2,127
Finance lease cost
Amortization of right-of-use assets	5,345	9,899
General and Administrative [Member]
Operating lease cost
Operating lease cost	399	489
Finance lease cost
Amortization of right-of-use assets	361	717
Interest Expense [Member]
Finance lease cost
Interest on lease liabilities	$ 1,168	$ 2,327

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Acquisitions - Summary of Identifiable Intangible Assets (Detail) - IWT [Member] $ in Thousands	Jul. 31, 2019 USD ($)
Business Acquisition [Line Items]
Total identifiable intangible assets, Preliminary fair value	$ 475,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Total identifiable intangible assets, Preliminary fair value	$ 270,000
Total identifiable intangible assets, Estimated useful lives	15 years
Patents and Developed Technology [Member]
Business Acquisition [Line Items]
Total identifiable intangible assets, Preliminary fair value	$ 140,000
Total identifiable intangible assets, Estimated useful lives	10 years
Tradename and Trademarks [Member]
Business Acquisition [Line Items]
Total identifiable intangible assets, Preliminary fair value	$ 65,000
Total identifiable intangible assets, Estimated useful lives	20 years

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Loss on Disposal of Assets and Costs from Exit and Disposal Activities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring plan activities	$ 1,022	$ 1,018
Other Accrued Liabilities and Other Liabilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Severance liability related to restructuring plan			$ 200
2018 Restructuring Plan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring plan activities		214
Pipe Segment [Member] | 2018 Restructuring Plan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring plan activities	700	700
International Segment [Member] | 2018 Restructuring Plan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring plan activities	$ 300	$ 300

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Business Segments Information - Schedule of Revenue from Reportable Segments by Product Type (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Net Sales	$ 495,905	$ 406,555	$ 909,613	$ 794,402
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	495,905	406,555	909,613	794,402
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net Sales	(12,531)		(12,531)
Pipe Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	281,063	249,380	543,244	491,450
Pipe Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	281,405	249,380	543,586	491,450
Pipe Segment [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net Sales	(342)		(342)
Allied Products and Other [Member]
Segment Reporting Information [Line Items]
Net Sales	114,358	101,889	226,551	202,317
Allied Products and Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	114,358	101,889	226,551	202,317
International Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	47,784	55,286	87,118	100,635
International Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	47,784	55,286	87,118	100,635
International Segment [Member] | Pipe [Member]
Segment Reporting Information [Line Items]
Net Sales	34,617	44,008	63,902	78,456
International Segment [Member] | Pipe [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	34,617	44,008	63,902	78,456
International Segment [Member] | Allied Products [Member]
Segment Reporting Information [Line Items]
Net Sales	13,167	11,278	23,216	22,179
International Segment [Member] | Allied Products [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	13,167	$ 11,278	23,216	$ 22,179
Infiltrator Water Technologies Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	52,700		52,700
Infiltrator Water Technologies Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	64,889		64,889
Infiltrator Water Technologies Segment [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net Sales	$ (12,189)		$ (12,189)

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Stock-Based Compensation - Summary of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 3,171	$ 1,812	$ 5,012	$ 3,371
Non-Employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	313	254	589	497
Equity-Classified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	700	795	1,251	1,568
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	957	528	1,599	974
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	1,201	235	1,573	332
Cost of Goods Sold [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	189	82	301	144
Selling Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	179	50	235	86
General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 2,803	$ 1,680	$ 4,476	$ 3,141

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Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018
Operating leases
Right-of-use assets	$ 24,010
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Current lease liabilities	$ 6,604
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherAccruedLiabilitiesCurrent
Non-current lease liabilities	$ 17,340
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Total operating lease liabilities	$ 23,944
Finance leases
Right-of-use assets	$ 102,948		$ 11,900
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet		us-gaap:PropertyPlantAndEquipmentNet
Current lease liabilities	$ 22,555	$ 23,117
Non-current lease liabilities	52,746	$ 61,555
Total finance lease liabilities	$ 75,301
Weighted average lease term
Operating leases	7 years 2 months 4 days
Finance leases	10 years 10 months 17 days
Weighted average discount rate
Operating leases	3.53%
Finance leases	4.96%

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Inventories - Additional Information (Detail) - USD ($)	Sep. 30, 2019	Mar. 31, 2019
Inventory Disclosure [Abstract]
Work-in-process inventories	$ 0	$ 0

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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	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivatives, Fair Value [Line Items]
Total net unrealized mark-to-market (gains) loss	$ 7	$ (276)	$ 1,795	$ (901)
Total net realized loss (gains)	962	(372)	803	(755)
Diesel Fuel Option Collars [Member]
Derivatives, Fair Value [Line Items]
Total net unrealized mark-to-market (gains) loss	7	154	76	142
Total net realized loss (gains)	150	(266)	157	(574)
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Total net unrealized mark-to-market (gains) loss		(430)	1,726	(1,043)
Total net realized loss (gains)	710	(67)	544	(92)
Foreign Exchange Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Total net unrealized mark-to-market (gains) loss			(7)
Total net realized loss (gains)	$ 102	$ (39)	$ 102	$ (90)

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Background and Summary of Significant Accounting Policies - Additional Information (Detail) - Segment		6 Months Ended
	Jul. 31, 2019	Sep. 30, 2019
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments		3
IWT [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Agreement and Plan of Merger date	Jul. 31, 2019	Jul. 31, 2019

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Net Income Per Share and Stockholders' Equity (Tables)

6 Months Ended

Sep. 30, 2019

Net Income Per Share And Stockholders Equity [Abstract]

Summary of Net Income Per Share

The following table presents information necessary to calculate net income per share for the periods presented, 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:

	Three Months Ended September 30,						Six Months Ended September 30,
(In thousands, except per share data)	2019			2018			2019			2018
NET INCOME PER SHARE—BASIC:
Net income (loss) attributable to ADS	$	7,589		$	28,670		$	(218,767	)	$	60,950
Adjustments for:
Dividends to redeemable convertible preferred    stockholders		(1,355	)		(478	)		(8,196	)		(975	)
Dividends paid to unvested restricted stockholders		(4	)		(15	)		(330	)		(30	)
Net income (loss) available to common stockholders    and participating securities		6,230			28,177			(227,293	)		59,945
Undistributed income allocated to participating    securities		(204	)		(2,310	)		—			(5,022	)
Net income (loss) available to common    stockholders – Basic	$	6,026		$	25,867		$	(227,293	)	$	54,923
Weighted average number of common shares    outstanding – Basic		60,222			56,929			58,906			56,776
Net income (loss) per common share – Basic	$	0.10		$	0.45		$	(3.86	)	$	0.97
NET INCOME PER SHARE—DILUTED:
Net income (loss) available to common    stockholders – Diluted	$	6,026		$	25,867		$	(227,293	)	$	54,923
Weighted average number of common shares    outstanding – Basic		60,222			56,929			58,906			56,776
Assumed exercise of stock options		576			629			—			598
Restricted stock		78			—			—			—
Weighted average number of common shares    outstanding – Diluted		60,876			57,558			58,906			57,374
Net income (loss) per common share – Diluted	$	0.10		$	0.45		$	(3.86	)	$	0.96
Potentially dilutive securities excluded as    anti-dilutive		15,084			6,303			13,269			6,229

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Leases (Tables)

6 Months Ended

Sep. 30, 2019

Leases [Abstract]

Schedule of Components of Lease Cost

Lease Cost - The components of lease cost for the three and six months ended September 30, 2019 was as follows:

(Amounts in thousands)	Income Statement Classification	Three Months Ended September 30, 2019		Six Months Ended September 30, 2019
Operating lease cost
Operating lease cost	Cost of goods sold	$	1,179	$	2,127
Operating lease cost	General and administrative		399		489
Short-term lease cost	Cost of goods sold		588		1,324
Total operating lease cost		$	2,166	$	3,940
Finance lease cost
Amortization of right-of-use assets	Cost of goods sold		5,345		9,899
Amortization of right-of-use assets	General and administrative		361		717
Interest on lease liabilities	Interest expense		1,168		2,327
Total finance lease cost		$	6,874	$	12,943

Schedule of Supplemental Cash Flow Information Related to Leases

Supplemental cash flow information related to leases for the six months ended September 30, 2019 was as follows:

(Amounts in thousands)	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,616
Operating cash flows from finance leases		2,434
Financing cash flows from finance leases		12,375
Right-of-use assets obtained in exchange for lease obligations:
Operating leases		4,774
Finance leases(a)		1,469

(a) The Company acquired $11.9 million of property, plant and equipment under finance leases in the six months ended September 30, 2018.

Schedule of Supplemental Balance Sheet Information Related to Leases

Supplemental balance sheet information related to leases as of September 30, 2019 was as follows:

(Amounts in thousands)	Balance Sheet Classification	2019
Operating leases
Right-of-use assets	Other assets	$	24,010
Current lease liabilities	Other accrued liabilities		6,604
Non-current lease liabilities	Other liabilities		17,340
Total operating lease liabilities		$	23,944
Finance leases
Right-of-use assets	Property, plant and equipment		102,948
Current lease liabilities	Current maturities of finance lease obligations		22,555
Non-current lease liabilities	Long-term finance lease obligations		52,746
Total finance lease liabilities		$	75,301
Weighted average lease term
Operating leases			7.18
Finance leases			10.88
Weighted average discount rate
Operating leases			3.53	%
Finance leases			4.96	%

Schedule of Future Minimum Lease Payments on Rolling Twelve-month Basis under Operating and Finance Leases

The following is a schedule by year of future minimum lease payments on a rolling twelve-month basis under operating and finance leases and the present value of the net minimum lease payments as of September 30, 2019:

(Amounts in thousands)	Operating Leases		Finance Leases
Year 1	$	7,443	$	25,926
Year 2		6,012		21,258
Year 3		3,742		15,777
Year 4		2,409		9,722
Year 5		1,663		5,740
Thereafter		6,719		6,525
Total minimum lease payments	$	27,988	$	84,948
Less: amount representing interest		4,044		9,647
Present value of net minimum lease payments	$	23,944	$	75,301

Schedule of Contractual Obligations for Capital and Operating Leases

As of March 31, 2019, total contractual obligations for capital and operating leases were as follows:

(Amounts in thousands)	Operating Leases		Capital Leases
2020	$	4,159	$	26,604
2021		2,924		22,507
2022		1,814		18,064
2023		690		11,721
2024		325		7,143
Thereafter		2,236		8,198
Total minimum lease payments	$	12,148	$	94,237
Less: amount representing interest		—		9,565
Present value of net minimum lease payments	$	12,148	$	84,672

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities
Net (loss) income	$ (218,989)	$ 63,023
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	43,260	35,363
Deferred income taxes	1,127	3,221
Loss on disposal of assets and costs from exit and disposal activities	2,711	1,428
ESOP and stock-based compensation	16,082	11,760
ESOP special dividend compensation	246,752
Amortization of deferred financing charges	34,285	387
Inventory step up related to Infiltrator Water Technologies acquisition	5,773
Fair market value adjustments to derivatives	996	(901)
Equity in net (income) loss of unconsolidated affiliates	(637)	691
Other operating activities	(3,635)	(1,342)
Changes in working capital:
Receivables	(44,883)	(64,649)
Inventories	57,316	16,378
Prepaid expenses and other current assets	(2,917)	(2,116)
Accounts payable, accrued expenses, and other liabilities	34,470	(5,082)
Net cash provided by operating activities	171,711	58,161
Cash Flows from Investing Activities
Capital expenditures	(25,622)	(19,299)
Acquisition of Infiltrator Water Technologies, net of cash acquired	(1,088,617)
Other investing activities	(116)	429
Net cash used in investing activities	(1,114,355)	(18,870)
Cash Flows from Financing Activities
Proceeds from Term Loan Facility	1,300,000
Payments on Term Loan Facility	(1,300,000)
Proceeds from syndication of Term Loan Facility	700,000
Proceeds from Senior Notes	350,000
Proceeds from Credit Agreement	177,900
Payments on Credit Agreement	(177,900)
Debt issuance costs	(34,606)
Payments on Prudential Senior Notes	(100,000)	(25,000)
Payments on finance lease obligations	(12,375)	(11,619)
Proceeds from common stock offering, net of offering costs	293,648
Cash dividends paid	(76,324)	(11,618)
Proceeds from exercise of stock options	2,430	3,473
Other financing activities	(236)	(1,026)
Net cash provided by (used in) financing activities	988,137	(39,090)
Effect of exchange rate changes on cash	(177)	(176)
Net change in cash	45,316	25
Cash at beginning of period	8,891	17,587
Cash at end of period	54,207	17,612
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for income taxes	7,199	18,331
Cash paid for interest	17,771	8,032
Non-cash operating, investing and financing activities:
Balance in accounts payable for the acquisition of property, plant and equipment	3,669	3,152
PNC Credit Agreement [Member]
Cash Flows from Financing Activities
Proceeds from Credit Agreement	253,900	250,100
Payments on Credit Agreement	$ (388,300)	$ (243,400)

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Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Current assets:
Cash	$ 54,207	$ 8,891
Receivables (less allowance for doubtful accounts of $5,939 and $7,653, respectively)	250,470	186,991
Inventories	248,914	264,540
Other current assets	10,629	6,091
Total current assets	564,220	466,513
Property, plant and equipment, net	492,017	398,891
Other assets:
Goodwill	669,753	102,638
Intangible assets, net	501,572	37,177
Other assets	67,758	36,940
Total assets	2,295,320	1,042,159
Current liabilities:
Current maturities of debt obligations	6,195	25,932
Current maturities of finance lease obligations	22,555	23,117
Accounts payable	111,450	93,577
Other accrued liabilities	97,979	61,901
Accrued income taxes	3,169	1,758
Total current liabilities	241,348	206,285
Long-term debt obligations (less unamortized debt issuance costs of $2,614 and $2,293, respectively)	1,043,154	208,602
Long-term finance lease obligations	52,746	61,555
Deferred tax liabilities	158,079	45,963
Other liabilities	37,017	19,119
Total liabilities	1,532,344	541,524
Commitments and contingencies (see Note 12)
Mezzanine equity:
Redeemable convertible preferred stock: $0.01 par value; 47,070 shares authorized; 44,170 shares issued; 22,383 and 22,611 shares outstanding, respectively	279,785	282,638
Deferred compensation – unearned ESOP shares	(28,565)	(180,316)
Total mezzanine equity	251,220	102,322
Stockholders’ equity:
Common stock; $0.01 par value: 1,000,000 shares authorized; 68,746 and 57,964 shares issued, respectively; 68,262 and 57,490 shares outstanding, respectively	11,545	11,436
Paid-in capital	800,947	391,039
Common stock in treasury, at cost	(10,162)	(9,863)
Accumulated other comprehensive loss	(26,427)	(25,867)
Retained (deficit) earnings	(277,725)	17,582
Total ADS stockholders’ equity	498,178	384,327
Noncontrolling interest in subsidiaries	13,578	13,986
Total stockholders’ equity	511,756	398,313
Total liabilities, mezzanine equity and stockholders’ equity	$ 2,295,320	$ 1,042,159

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Revenue Recognition

6 Months Ended

Sep. 30, 2019

Revenue From Contract With Customer [Abstract]

Revenue Recognition

4. REVENUE RECOGNITION

Revenue Disaggregation - The Company disaggregates net sales by Domestic, International and Infiltrator Water Technologies and further disaggregates Domestic and International by product type, consistent with its reportable segment disclosure. This disaggregation level best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. Refer to “Note 15. Business Segments Information” for the Company’s disaggregation of Net sales by reportable segment.

Contract Balances - The Company recognizes a contract asset representing the Company’s right to recover products upon the receipt of returned products and a contract liability for the customer refund. The following table presents the balance of the Company’s contract asset and liability as of September 30, 2019 and March 31, 2019:

	September 30, 2019		March 31, 2019
	(In thousands)
Contract asset - product returns	$	1,069	$	646
Refund liability		2,429		1,372

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Derivative Transactions

6 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Derivative Transactions

8. DERIVATIVE TRANSACTIONS

The Company uses commodity options in the form of collars and swaps, and has previously used interest rate swaps and foreign currency forward contracts to manage its various exposures to interest rate, commodity price fluctuations and foreign currency exchange rate fluctuations. Interest rate swap gains and losses resulting from the difference between the spot rate and applicable base rate is recorded in the Condensed Consolidated Statements of Operations in Interest expense. For collars, commodity swaps and foreign currency forward contracts, contract settlement gains and losses are recorded in the Condensed Consolidated Statements of Operations in Derivative gains and other 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 Condensed Consolidated Statements of Operations in Derivative gains and other income, net.

The Company recorded net losses and net (gains) on mark-to-market adjustments for changes in the fair value of derivatives contracts as well as net losses and net (gains) on the settlement of derivative contracts as follows:

	Three Months Ended September 30,					Six Months Ended September 30,
	2019		2018			2019			2018
	(In thousands)					(In thousands)
Diesel fuel option collars	$	7	$	154		$	76		$	142
Interest rate swaps		—		(430	)		1,726			(1,043	)
Foreign exchange forward contracts		—		—			(7	)		—
Total net unrealized mark-to-market (gains) loss	$	7	$	(276	)	$	1,795		$	(901	)
Diesel fuel option collars		150		(266	)		157			(574	)
Foreign exchange forward contracts		102		(39	)		102			(90	)
Interest rate swaps		710		(67	)		544			(92	)
Total net realized loss (gains)	$	962	$	(372	)	$	803		$	(755	)

A summary of the fair value of derivatives is included in “Note 7. Fair Value Measurement.”

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Stock-Based Compensation

6 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

14. STOCK-BASED COMPENSATION

ADS has several programs for stock-based payments to employees and non-employee members of its Board of Directors, including stock options and restricted stock. Equity-classified restricted stock awards are measured based on the grant-date estimated fair value of each award. The Company accounts for all restricted stock granted to Directors as equity-classified awards. The Company recognized stock-based compensation expense in the following line items of the Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Component of income before income taxes:
Cost of goods sold	$	189	$	82	$	301	$	144
Selling expenses		179		50		235		86
General and administrative expenses		2,803		1,680		4,476		3,141
Total stock-based compensation expense	$	3,171	$	1,812	$	5,012	$	3,371

The following table summarizes stock-based compensation expense by award type for the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Stock-based compensation expense:
Equity-classified Stock Options	$	700	$	795	$	1,251	$	1,568
Restricted Stock		957		528		1,599		974
Performance Units		1,201		235		1,573		332
Non-Employee Directors		313		254		589		497
Total stock-based compensation expense	$	3,171	$	1,812	$	5,012	$	3,371

2017 Omnibus Plan

On May 24, 2017, the Board of Directors approved the 2017 Omnibus Incentive Plan (the “2017 Incentive Plan”) which was approved by the Company’s stockholders on July 17, 2017. The 2017 Incentive Plan provides for the issuance of a maximum of 3.5 million shares of the Company’s common stock for awards made thereunder, which awards may consist of stock options, restricted stock, restricted stock units, stock appreciation rights, phantom stock, cash-based awards, performance awards (which may take the form of performance cash, performance units or performance shares) or other stock-based awards.

Restricted Stock - During the three and six months ended September 30, 2019, the Company granted 0.1 million and 0.2 million shares of restricted stock with a grant date fair value of $3.6 million and $6.9 million, respectively.

Performance Units - In addition, during the six months ended September 30, 2019, the Company granted 0.1 million performance units, subject to performance and services conditions. The grant date fair value of the performance units was $3.4 million, based on the market price of the Company’s common stock at the date of the grant. For the performance units, 50% of the award is based upon the achievement of certain levels of Return on Invested Capital for the performance period and 50% is based upon the achievement of certain levels of Free Cash Flow for the performance period. The performance units have a 3-year performance period from April 1, 2019 through March 31, 2022. The performance units, and any accrued dividend equivalents, will be settled in shares of the Company’s common stock, if the applicable performance and service conditions are satisfied.

Options - During the six months ended September 30, 2019, the Company granted 0.3 million nonqualified stock options under the 2017 Incentive Plan. The grant date fair value of the nonqualified stock options was $2.7 million. The Company estimates the fair value of stock options using a Black-Scholes option-pricing model. The following table summarizes the assumptions used in estimate the fair value of stock-options during the six months ended September 30, 2019:

	Three Months Ended September 30,
Common stock price	$27.44
Expected stock price volatility	30.9%
Risk-free interest rate	2.3%
Weighted-average expected option life (years)	6.0
Dividend yield	1.3%

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Loss on Disposal of Assets and Costs from Exit and Disposal Activities (Tables)

6 Months Ended

Sep. 30, 2019

Discontinued Operations And Disposal Groups [Abstract]

Summary of Loss on Disposal of Assets and Costs from Exit and Disposal Activities

The following table summarizes the activity included in Loss on disposal of assets and costs from exit and disposal activities recorded during the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,					Six Months Ended September 30,
	2019		2018			2019		2018
	(In thousands)					(In thousands)
Accelerated depreciation	$	—	$	430		$	—	$	430
Plant severance		—		118			—		83
Product optimization		—		303			—		303
Other restructuring activities		—		171			—		202
Total 2018 Restructuring Plan activities	$	—	$	1,022		$	—	$	1,018
Loss (gain) on other disposals and partial disposals of property, plant and equipment		444		(698	)		1,151		410
Acquisition related severance costs		1,560		—			1,560		—
Total loss on disposal of assets and costs from exit and disposal activities	$	2,004	$	324		$	2,711	$	1,428

Schedule of Reconciliation of Restructuring Liability

A reconciliation of the beginning and ending amounts of restructuring liability related to the 2018 Restructuring Plan at September 30, 2019 and 2018 is as follows:

	Six Months Ended September 30,
	2019			2018
	(In thousands)
Balance at the beginning of the period	$	1,696		$	3,901
Expenses		—			214
Non-cash expenses		—			59
Payments		(842	)		(1,867	)
Balance at the end of the period	$	854		$	2,307

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Revenue Recognition - Schedule of Contract Asset and Liability (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Contract With Customer Asset And Liability [Abstract]
Contract asset - product returns	$ 1,069	$ 646
Refund liability	$ 2,429	$ 1,372

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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jul. 31, 2019	Sep. 30, 2019	Sep. 30, 2019	Mar. 31, 2019
Business Acquisition [Line Items]
Goodwill		$ 669,753	$ 669,753	$ 102,638
IWT [Member]
Business Acquisition [Line Items]
Agreement and Plan of Merger date	Jul. 31, 2019		Jul. 31, 2019
Total fair value of consideration transferred	$ 1,146,000
Amount payable to acquire	6,000
Amount receivable from acquire	6,600
Goodwill	567,034
Deferred tax liabilities	109,926
Step up of GAAP basis for fair market valuations	59,800
Deferred tax liabilities, acquired	50,100
Transaction costs related to Acquisition		16,600	$ 20,800
Estimates transaction cost including tax		7,300	7,300
Intangible assets	$ 475,000
Net sales of acquired entity included in condensed consolidated statements of operations		$ 52,700
Earnings from operations of acquired entity included in condensed consolidated statements of operations			$ 6,900
IWT [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible asset, useful life	15 years
IWT [Member] | Patents and Developed Technology [Member]
Business Acquisition [Line Items]
Intangible asset, useful life	10 years
IWT [Member] | Tradename and Trademarks [Member]
Business Acquisition [Line Items]
Intangible asset, useful life	20 years
IWT [Member] | Intangible Assets [Member]
Business Acquisition [Line Items]
Step up of GAAP basis for fair market valuations	$ 55,700
IWT [Member] | Maximum [Member]
Business Acquisition [Line Items]
Business combination measurement period	1 year

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Debt - Maturities of Long-term Debt (Excluding Interest and Deferred Financing Costs) (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Debt Disclosure [Abstract]
2020	$ 6,195
2021	7,931
2022	7,084
2023	7,000
2024	7,000
Thereafter	1,016,753
Total	$ 1,051,963	$ 236,827

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Net Income Per Share and Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			6 Months Ended
	Sep. 10, 2019	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019	Feb. 28, 2017
Equity Class Of Treasury Stock [Line Items]
Common stock, par value		$ 0.01			$ 0.01		$ 0.01
Proceeds from issuance of common stock after deducting underwriting discounts and commissions and offering expenses	$ 300,000				$ 293,648
Stock repurchase program amount authorized								$ 50,000
Cash dividend declared			$ 0.09
Dividend payment			$ 81,600
Additional stock-based compensation expense		$ 3,171		$ 1,812	5,012	$ 3,371
Cost of Goods Sold - ESOP special dividend compensation and Selling, General and Administrative Expenses [Member]
Equity Class Of Treasury Stock [Line Items]
Additional stock-based compensation expense			$ 246,800
ESOP [Member]
Equity Class Of Treasury Stock [Line Items]
Number of redeemable convertible preferred stock allocated to ESOP participants			11,600
Amount of dividend from unallocated redeemable convertible preferred stock held in the ESOP trust to repay ESOP loan			$ 12,000
Special Dividend [Member]
Equity Class Of Treasury Stock [Line Items]
Cash dividend declared			$ 1.00
Dividend payable date			Jun. 14, 2019
Dividend payable, date of record			Jun. 03, 2019
Special Dividend [Member] | ESOP [Member]
Equity Class Of Treasury Stock [Line Items]
Dividend payable date			Jun. 14, 2019
Additional stock-based compensation expense					$ 246,800
Common Stock [Member]
Equity Class Of Treasury Stock [Line Items]
Aggregate shares of common stock issued and sold		10,350,000			10,350,000
Common stock repurchases, Shares		0		0	0	0
Stock repurchase program amount authorized		$ 42,100			$ 42,100
Common Stock Offering [Member]
Equity Class Of Treasury Stock [Line Items]
Aggregate shares of common stock issued and sold	10,350,000
Common stock, par value	$ 0.01
Shares price per share	$ 29.75
Proceeds from issuance of common stock after deducting underwriting discounts and commissions and offering expenses	$ 293,600

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Debt (Repayment of Prudential Senior Notes) - Additional Information (Detail) - Prudential Senior Notes [Member] $ in Millions	Jul. 29, 2019 USD ($)
Debt Instrument [Line Items]
Repayments of debt	$ 104.4
Write-off of unamortized deferred financing fees and prepayment premiums	$ 4.2

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Leases - Schedule of Contractual Obligations for Capital and Operating Leases (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Leases
2020	$ 4,159
2021	2,924
2022	1,814
2023	690
2024	325
Thereafter	2,236
Total minimum lease payments	12,148
Present value of net minimum lease payments	12,148
Capital Leases
2020	26,604
2021	22,507
2022	18,064
2023	11,721
2024	7,143
Thereafter	8,198
Total minimum lease payments	94,237
Less: amount representing interest	9,565
Present value of net minimum lease payments	$ 84,672

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Fair Value Measurement - Additional Information (Detail) - USD ($)	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets and liabilities, additional transfers	$ 0	$ 0
Prudential Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior notes			$ 100,000,000
Senior notes, fair value			$ 98,900,000
Senior Notes Payable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior notes	350,000,000
Senior notes, fair value	$ 355,300,000

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Stock-Based Compensation - Summary of Assumption Used in Estimate Fair Value of Stock Options (Detail)	6 Months Ended
	Sep. 30, 2019 $ / shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Common stock price	$ 27.44
Expected stock price volatility	30.90%
Risk-free interest rate	2.30%
Weighted-average expected option life (years)	6 years
Dividend yield	1.30%

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Commitments and Contingencies (Purchase Commitments) - Additional Information (Detail) $ in Millions	6 Months Ended
	Sep. 30, 2019 USD ($)
Inventory [Member]
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	$ 5.9
Equipment Purchase Contracts [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Total purchase commitment	$ 1.4

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Business Segments Information - Reconciliation of Gross Profit to Segment Adjusted Gross Profit (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	$ 146,524	$ 95,373	$ 84,366	$ 195,064
Depreciation and amortization	15,708	14,354	29,392	29,072
ESOP and stock-based compensation expense	3,869	3,082	7,640	5,937
ESOP special dividend compensation			168,610
Inventory step up			5,773
Total Segment Adjusted Gross Profit	171,874	$ 112,809	295,781	$ 230,073
Infiltrator Water Technologies [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Inventory step up	$ 5,773		$ 5,773

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Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net sales	$ 495,905	$ 406,555	$ 909,613	$ 794,402
Cost of goods sold	349,381	311,182	656,637	599,338
Cost of goods sold - ESOP special dividend compensation			168,610
Gross profit	146,524	95,373	84,366	195,064
Operating expenses:
Selling	29,971	24,731	56,336	48,896
General and administrative	48,030	21,584	79,463	42,966
Loss on disposal of assets and costs from exit and disposal activities	2,004	324	2,711	1,428
Intangible amortization	9,300	1,985	10,842	3,969
Income (loss) from operations	57,219	46,749	(143,128)	97,805
Other expense:
Interest expense	52,332	4,531	57,596	8,333
Derivative loss (gains) and other expense (income), net	175	94	79	(720)
Income (loss) before income taxes	4,712	42,124	(200,803)	90,192
Income tax (benefit) expense	(3,547)	12,194	18,823	26,478
Equity in net (income) loss of unconsolidated affiliates	(203)	558	(637)	691
Net income (loss)	8,462	29,372	(218,989)	63,023
Less: net income (loss) attributable to noncontrolling interest	873	702	(222)	2,073
Net income (loss) attributable to ADS	$ 7,589	$ 28,670	$ (218,767)	$ 60,950
Weighted average common shares outstanding:
Basic	60,222	56,929	58,906	56,776
Diluted	60,876	57,558	58,906	57,374
Net income (loss) per share:
Basic	$ 0.10	$ 0.45	$ (3.86)	$ 0.97
Diluted	$ 0.10	$ 0.45	$ (3.86)	$ 0.96
ESOP special dividend compensation [Member]
Operating expenses:
Selling, general and administrative - ESOP special dividend compensation			$ 78,142

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Related Party Transactions

6 Months Ended

Sep. 30, 2019

Related Party Transactions [Abstract]

Related Party Transactions

10. RELATED PARTY TRANSACTIONS

ADS Mexicana - ADS conducts business in Mexico and Central America through its joint venture ADS Mexicana, S.A. de C.V. (together with its affiliate ADS Corporativo, S.A. de C.V., “ADS Mexicana”). ADS owns 51% of the outstanding stock of ADS Mexicana and consolidates ADS Mexicana for financial reporting purposes.

On June 22, 2018, the Company and ADS Mexicana entered into an Intercompany Revolving Credit Promissory Note (the “Intercompany Note”) with a borrowing capacity of $12.0 million. The Intercompany Note matures on June 22, 2022. The other joint venture partner indemnifies the Company for 49% of any unpaid borrowing. The interest rates under the Intercompany Note are determined by certain base rates or London Interbank Offered Rate (“LIBOR”) plus an applicable margin based on the Leverage Ratio. As of September 30, 2019, there were no borrowings under the Intercompany Note.

South American Joint Venture - The Tuberias Tigre - ADS Limitada joint venture (the “South American Joint Venture”) manufactures and sells HDPE corrugated pipe in certain South American markets. ADS owns 50% of the South American Joint Venture. 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 Condensed 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 Condensed Consolidated Balance Sheets. ADS is the guarantor of 50% of the South American Joint Venture’s credit facility, and the debt guarantee is shared equally with the joint venture partner. The Company’s maximum potential obligation under this guarantee is $11.0 million as of September 30, 2019. The maximum borrowings permitted under the South American Joint Venture’s credit facility are $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 September 30, 2019 and March 31, 2019, the outstanding principal balances of the credit facility including letters of credit were $11.2 million and $12.3 million, respectively. As of September 30, 2019, there were no U.S. dollar denominated loans. The weighted average interest rate as of September 30, 2019 was 5.3% on Chilean peso denominated loans.

ADS and the South American Joint Venture have shared services arrangements in order to execute the joint venture services. In addition, the South American Joint Venture has entered into agreements for pipe and other product sales to ADS and its other related parties, which totaled $0.1 million and $0.5 million for the three and six months ended September 30, 2019, and zero and $0.6 million for the three and six months ended September 30, 2018. ADS pipe sales to the South American Joint Venture were $0.1 million and $0.4 million for the three and six months ended September 30, 2019, and $0.4 million and $0.6 million for the three and six months ended September 30, 2018, respectively.

Tigre USA - Tigre USA was a joint venture that ADS no longer has an ownership interest in, but the owner is the partner for the South American Joint Venture.

ADS purchased $0.6 million and $1.2 million of Tigre USA manufactured products for use in the production of ADS products during the three and six months ended September 30, 2019. ADS purchased $0.7 million and $1.2 million of Tigre USA manufactured products for use in the production of ADS products during the three and six months ended September 30, 2018.

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Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Paid-In Capital [Member]	Common Stock in Treasury [Member]	Accumulated Other Comprehensive Loss [Member]	Retained (Deficit) Earnings [Member]	Total ADS Stockholders' Equity [Member]	Non-controlling Interest in Subsidiaries [Member]
Beginning Balance, Value at Mar. 31, 2018	$ 324,259	$ 11,426	$ 364,908	$ (8,277)	$ (21,247)	$ (39,214)	$ 307,596	$ 16,663
Beginning Balance, Shares at Mar. 31, 2018		56,889		413
Net income (loss)	62,191					60,950	60,950	1,241
Other comprehensive (income) loss	(1,975)				(1,596)		(1,596)	(379)
Redeemable convertible preferred stock dividends	(975)					(975)	(975)
Common stock dividends	(9,130)					(9,130)	(9,130)
Dividend paid to non-controlling interest holder	(735)							(735)
Allocation of ESOP shares to participants for compensation	3,597		3,597				3,597
Exercise of common stock options	2,771	$ 2	3,473	$ (704)			2,771
Exercise of common stock options, Shares		242		26
Restricted stock awards	(53)	$ 1		$ (54)			(53)
Restricted stock awards, Shares		19		2
Stock-based compensation expense	3,371		3,371				3,371
ESOP distribution in common stock	6,130	$ 4	6,126				6,130
ESOP distributions in common stock, Shares		375
Ending Balance, Value at Sep. 30, 2018	389,451	$ 11,433	381,475	$ (9,035)	(22,843)	11,631	372,661	16,790
Ending Balance, Shares at Sep. 30, 2018		57,525		441
Beginning Balance, Value at Jun. 30, 2018	356,539	$ 11,431	375,215	$ (9,033)	(24,684)	(11,976)	340,953	15,586
Beginning Balance, Shares at Jun. 30, 2018		57,366		441
Net income (loss)	28,878					28,670	28,670	208
Other comprehensive (income) loss	2,837				1,841		1,841	996
Redeemable convertible preferred stock dividends	(478)					(478)	(478)
Common stock dividends	(4,585)					(4,585)	(4,585)
Allocation of ESOP shares to participants for compensation	1,972		1,972				1,972
Exercise of common stock options	258		258				258
Exercise of common stock options, Shares		25
Restricted stock awards	(2)			$ (2)			(2)
Stock-based compensation expense	1,812		1,812				1,812
ESOP distribution in common stock	2,220	$ 2	2,218				2,220
ESOP distributions in common stock, Shares		134
Ending Balance, Value at Sep. 30, 2018	389,451	$ 11,433	381,475	$ (9,035)	(22,843)	11,631	372,661	16,790
Ending Balance, Shares at Sep. 30, 2018		57,525		441
Beginning Balance, Value at Mar. 31, 2019	398,313	$ 11,436	391,039	$ (9,863)	(25,867)	17,582	384,327	13,986
Beginning Balance, Shares at Mar. 31, 2019		57,964		474
Net income (loss)	(218,989)					(218,767)	(218,767)	(222)
Other comprehensive (income) loss	(746)				(560)		(560)	(186)
Redeemable convertible preferred stock dividends	(8,195)					(8,195)	(8,195)
Common stock dividends	(68,345)					(68,345)	(68,345)
Allocation of ESOP shares to participants for compensation	4,882		4,882				4,882
ESOP special dividend compensation	101,189		101,189				101,189
Exercise of common stock options	2,225	$ 2	2,430	$ (207)			2,225
Exercise of common stock options, Shares		168		7
Restricted stock awards	(91)	$ 1		$ (92)			(91)
Restricted stock awards, Shares		88		3
Stock-based compensation expense	5,012		5,012				5,012
ESOP distribution in common stock	2,853	$ 2	2,851				2,853
ESOP distributions in common stock, Shares		176
Common Stock Offering, Value	293,648	$ 104	293,544				293,648
Common Stock Offering, Shares		10,350
Ending Balance, Value at Sep. 30, 2019	511,756	$ 11,545	800,947	$ (10,162)	(26,427)	(277,725)	498,178	13,578
Ending Balance, Shares at Sep. 30, 2019		68,746		484
Beginning Balance, Value at Jun. 30, 2019	212,184	$ 11,439	501,046	$ (10,162)	(24,470)	(278,727)	199,126	13,058
Beginning Balance, Shares at Jun. 30, 2019		58,283		484
Net income (loss)	8,462					7,589	7,589	873
Other comprehensive (income) loss	(2,310)				(1,957)		(1,957)	(353)
Redeemable convertible preferred stock dividends	(1,349)					(1,349)	(1,349)
Common stock dividends	(5,238)					(5,238)	(5,238)
Allocation of ESOP shares to participants for compensation	2,392		2,392				2,392
Exercise of common stock options	764	$ 1	763				764
Exercise of common stock options, Shares		54
Restricted stock awards	1	$ 1					1
Restricted stock awards, Shares		57
Stock-based compensation expense	3,171		3,171				3,171
ESOP distribution in common stock	31		31				31
ESOP distributions in common stock, Shares		2
Common Stock Offering, Value	293,648	$ 104	293,544				293,648
Common Stock Offering, Shares		10,350
Ending Balance, Value at Sep. 30, 2019	$ 511,756	$ 11,545	$ 800,947	$ (10,162)	$ (26,427)	$ (277,725)	$ 498,178	$ 13,578
Ending Balance, Shares at Sep. 30, 2019		68,746		484

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Loss on Disposal of Assets and Costs from Exit and Disposal Activities

6 Months Ended

Sep. 30, 2019

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

In fiscal 2018, the Company initiated restructuring activities (the “2018 Restructuring Plan”), which concluded during fiscal 2019. The following table summarizes the activity included in Loss on disposal of assets and costs from exit and disposal activities recorded during the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,					Six Months Ended September 30,
	2019		2018			2019		2018
	(In thousands)					(In thousands)
Accelerated depreciation	$	—	$	430		$	—	$	430
Plant severance		—		118			—		83
Product optimization		—		303			—		303
Other restructuring activities		—		171			—		202
Total 2018 Restructuring Plan activities	$	—	$	1,022		$	—	$	1,018
Loss (gain) on other disposals and partial disposals of property, plant and equipment		444		(698	)		1,151		410
Acquisition related severance costs		1,560		—			1,560		—
Total loss on disposal of assets and costs from exit and disposal activities	$	2,004	$	324		$	2,711	$	1,428

Approximately $0.7 million of the Total 2018 Restructuring Plan activities related to the Pipe reporting segment for the three and six months ended September 30, 2018, respectively. There was $0.3 million of the

Total 2018 Restructuring Plan activities related to the International reporting segment for the three and six months ended September 30, 2018.

A reconciliation of the beginning and ending amounts of restructuring liability related to the 2018 Restructuring Plan at September 30, 2019 and 2018 is as follows:

	Six Months Ended September 30,
	2019			2018
	(In thousands)
Balance at the beginning of the period	$	1,696		$	3,901
Expenses		—			214
Non-cash expenses		—			59
Payments		(842	)		(1,867	)
Balance at the end of the period	$	854		$	2,307

As of September 30, 2019, the Company had $0.2 million of long-term severance liability related to the restructuring activities recorded in other liabilities in the Condensed Consolidated Balance Sheet. The current portion of the restructuring liability is recorded in Other accrued liabilities in the Condensed Consolidated Balance Sheet.

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Inventories

6 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

6. INVENTORIES

Inventories as of the periods presented consisted of the following:

	September 30, 2019		March 31, 2019
	(In thousands)
Raw materials	$	60,243	$	47,910
Finished goods		188,671		216,630
Total inventories	$	248,914	$	264,540

There were no work-in-process inventories as of the periods presented.

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Stock-Based Compensation (Tables)

6 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock-based Compensation Expense

The Company recognized stock-based compensation expense in the following line items of the Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Component of income before income taxes:
Cost of goods sold	$	189	$	82	$	301	$	144
Selling expenses		179		50		235		86
General and administrative expenses		2,803		1,680		4,476		3,141
Total stock-based compensation expense	$	3,171	$	1,812	$	5,012	$	3,371

The following table summarizes stock-based compensation expense by award type for the three and six months ended September 30, 2019 and 2018:

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Stock-based compensation expense:
Equity-classified Stock Options	$	700	$	795	$	1,251	$	1,568
Restricted Stock		957		528		1,599		974
Performance Units		1,201		235		1,573		332
Non-Employee Directors		313		254		589		497
Total stock-based compensation expense	$	3,171	$	1,812	$	5,012	$	3,371

Summary of Assumption Used in Estimate Fair Value of Stock Options

The following table summarizes the assumptions used in estimate the fair value of stock-options during the six months ended September 30, 2019:

	Three Months Ended September 30,
Common stock price	$27.44
Expected stock price volatility	30.9%
Risk-free interest rate	2.3%
Weighted-average expected option life (years)	6.0
Dividend yield	1.3%

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Fair Value Measurement (Tables)

6 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Carried at Fair Value

The assets and liabilities carried at fair value as of the periods presented were as follows:

	September 30, 2019
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Derivative assets – diesel fuel contracts	$	20	$	—	$	20	$	—
Total assets at fair value on a recurring basis	$	20	$	—	$	20	$	—
Liabilities:
Derivative liabilities – diesel fuel contracts	$	81	$	—	$	81	$	—
Total liabilities at fair value on a recurring basis	$	81	$	—	$	81	$	—

	March 31, 2019
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Derivative assets – diesel fuel contracts	$	189	$	—	$	189	$	—
Interest rate swaps		1,088		—		1,088		—
Total assets at fair value on a recurring basis	$	1,277	$	—	$	1,277	$	—
Liabilities:
Derivative liability - diesel fuel contracts	$	283	$	—	$	283	$	—
Foreign exchange contracts		60		—		60		—
Contingent consideration for acquisitions		203		—		—		203
Total liabilities at fair value on a recurring basis	$	546	$	—	$	343	$	203

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 periods presented were as follows:

	Three Months Ended September 30,						Six Months Ended September 30,
	2019			2018			2019			2018
	(In thousands)						(In thousands)
Balance at the beginning of the period	$	57		$	460		$	203		$	578
Change in fair value		40			7			40			9
Payments of contingent consideration liability		(17	)		(142	)		(163	)		(262	)
Balance at the end of the period	$	80		$	325		$	80		$	325

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Leases - Schedule of Future Minimum Lease Payments on Rolling Twelve-month Basis under Operating and Finance Leases (Detail) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Leases
Year 1	$ 7,443
Year 2	6,012
Year 3	3,742
Year 4	2,409
Year 5	1,663
Thereafter	6,719
Total minimum lease payments	27,988
Less: amount representing interest	4,044
Present value of net minimum lease payments	23,944
Finance Leases
Year 1	25,926
Year 2	21,258
Year 3	15,777
Year 4	9,722
Year 5	5,740
Thereafter	6,525
Total minimum lease payments	84,948
Less: amount representing interest	9,647
Present value of net minimum lease payments	$ 75,301

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Fair Value Measurement - Summary of Assets and Liabilities Carried at Fair Value (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a recurring basis	$ 20	$ 1,277
Contingent consideration for acquisitions		203
Total liabilities at fair value on a recurring basis	81	546
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	20	1,277
Total liabilities at fair value on a recurring basis	81	343
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration for acquisitions		203
Total liabilities at fair value on a recurring basis		203
Diesel Fuel Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	20	189
Derivative liability	81	283
Diesel Fuel Contracts [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	20	189
Derivative liability	$ 81	283
Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		1,088
Interest Rate Swaps [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		1,088
Foreign Exchange Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		60
Foreign Exchange Forward Contracts [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		$ 60

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Subsequent Events - Additional Information (Detail) - $ / shares	3 Months Ended			6 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Subsequent Event [Line Items]
Common stock dividend per share		$ 0.09	$ 0.08	$ 1.18	$ 0.16
Scenario, Forecast [Member]
Subsequent Event [Line Items]
Common stock dividend per share	$ 0.09
Dividend payable date	Dec. 13, 2019
Dividend payable, date of record	Nov. 29, 2019

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Business Segments Information - Additional Information (Detail)	6 Months Ended
	Sep. 30, 2019 Segment
Segment Reporting [Abstract]
Number of reportable segments	3

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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions		3 Months Ended			6 Months Ended
	Jul. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Taxes [Line Items]
Effective income tax rate		(75.30%)		28.90%	(9.40%)	29.40%
Non-deductible transaction costs		$ 1,100
Discrete income tax expense					$ 60,700
Additional stock-based compensation expense		$ 3,171		$ 1,812	5,012	$ 3,371
IWT [Member]
Income Taxes [Line Items]
Increase in unrecognized tax benefits	$ 1,400
Total purchase price	109,926
Purchase price related to step up of GAAP basis for fair market valuations	59,800
Deferred tax liabilities acquired	50,100
IWT [Member] | Intangible Assets [Member]
Income Taxes [Line Items]
Purchase price related to step up of GAAP basis for fair market valuations	$ 55,700
Special Dividend [Member]
Income Taxes [Line Items]
Dividend payable date			Jun. 14, 2019
Employee Stock Ownership Plan (ESOP) [Member]
Income Taxes [Line Items]
Non-deductible stock appreciation of total stock-based compensation expense					$ 237,600
Effective tax rate reduced by discrete event					30.30%
Employee Stock Ownership Plan (ESOP) [Member] | Special Dividend [Member]
Income Taxes [Line Items]
Shares allocated from the ESOP from discrete event		11.6			11.6
Dividend payable date			Jun. 14, 2019
Additional stock-based compensation expense					$ 246,800

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Background and Summary of Significant Accounting Policies

6 Months Ended

Sep. 30, 2019

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” or 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.

On July 31, 2019, the Company completed its acquisition (the “Acquisition”) of Infiltrator Water Technologies Ultimate Holdings, Inc. (“Infiltrator Water Technologies”). Infiltrator Water Technologies is a leading national provider of plastic leach field chambers and systems, septic tanks and accessories, primarily for use in residential applications. Infiltrator Water Technologies’ products are used in on-site septic wastewater treatment systems in the United States and Canada. Infiltrator Water Technologies manufactures and sells StormTech and ARC Septic Chambers to certain entities affiliated with ADS. See “Note 3. Acquisitions” for additional information on the Acquisition.

The Company is managed and reports results of operations in three reportable segments: Pipe, Infiltrator Water Technologies and International. The Company also reports its Allied Products and all other business segments as Allied Products and Other.

Historically, sales of the Company’s products have been higher in the first and second quarters of each fiscal year due to favorable weather and longer daylight conditions accelerating construction activity during these periods. Seasonal variations in operating results may also be impacted by inclement weather conditions, such as cold or wet weather, which can delay projects.

Basis of Presentation - The Company prepares its Condensed Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Condensed Consolidated Balance Sheet as of March 31, 2019 was derived from audited financial statements included in the Annual Report on Form 10-K for the year ended March 31, 2019 (“Fiscal 2019 Form 10-K”). The accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments, of a normal recurring nature, necessary to present fairly its financial position as of September 30, 2019 and the results of operations and cash flows for the three and six months ended September 30, 2019. The interim Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, filed in the Company’s Fiscal 2019 Form 10-K.

Principles of Consolidation - The Condensed 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 Condensed Consolidated Balance Sheets and the related equity earnings from these investments are included in Equity in net loss of unconsolidated affiliates in the Condensed Consolidated Statements of Operations. All intercompany balances and transactions have been eliminated in consolidation.

Recent Accounting Guidance

Recently Adopted Accounting Guidance

Leases - In February 2016, the Financial Accounting Standards Board (the “FASB”) issued an accounting standard update (“ASU”) which amends the guidance for leases (“ASC 842”). This standard 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 standard 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. In July 2018, the FASB amended ASC 842 to provide another transition method, allowing a cumulative effect adjustment to the opening balance of retained earnings during the period of adoption. The Company adopted these standards effective April 1, 2019 using the transition method in the July 2018 ASU which does not require adjustments to comparative periods or require modified disclosures for those periods and includes transition relief practical expedients. “Note 5. Leases” for further information on the adoption of the new lease ASUs.

Hedge Accounting - In August 2017, the FASB issued an ASU which expanded an entity’s ability to apply hedge accounting for non-financial and financial risk components and provided a simplified approach for fair value hedging of interest rate risk. The standard also refined how entities assess hedge effectiveness. The Company adopted this standard effective April 1, 2019. The new standard did not have an impact on the Condensed Consolidated Financial Statements.

Recent Accounting Guidance Not Yet Adopted

Measurement of Credit Losses - In June 2016, the FASB issued an ASU which provides amended guidance on the measurement of credit losses on financial instruments, including trade receivables. This standard requires the use of an impairment model referred to as the current expected credit loss model. This standard 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 Condensed Consolidated Financial Statements.

Except for the pronouncements described above, there have been no new accounting pronouncements issued or adopted since the filing of the Fiscal 2019 Form 10-K that have significance, or potential significance, to the Condensed Consolidated Financial Statements.

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Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Stockholders Equity [Abstract]
Common stock dividend per share	$ 0.09	$ 0.08	$ 1.18	$ 0.16

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Leases

6 Months Ended

Sep. 30, 2019

Leases [Abstract]

Leases

5. LEASES

ASC 842 Adoption - The Company adopted the provisions of ASC 842 beginning on April 1, 2019 using the transition methodology in ASC 842 which does not require adjustments to comparative periods or require modified disclosures. The Company elected the transition relief practical expedient package as described in ASC 842-10-65-1. ASC 842 provides lessees with the option of electing an accounting policy, by class of underlying asset, in which the lessee may choose not to separate nonlease components from lease components. The Company elected this practical expedient for leases of certain classes of equipment, including forklifts and fleet tractors and trailers. The Company also elected the accounting policy to not recognize the right-of-use asset and lease liability for leases with an initial expected term of 12 months or less (“Short-term leases”). The adoption of ASC 842 resulted in the recording of $13.3 million of additional lease liabilities and right-of-use assets to the beginning balance of the Company’s Condensed Consolidated Balance Sheet. Infiltrator Water Technologies adopted ASC 842 on July 31, 2019 using the same methodology and policy elections taken by the Company on April 1, 2019. The Infiltrator Water Technologies adoption of ASC 842 resulted in the recording of $11.2 million of additional lease liabilities and corresponding right-of-use assets to the beginning balance of the Company’s Condensed Consolidated Balance Sheet as of September 30, 2019. The adoption did not have an impact on the Company’s Condensed Consolidated Statement of Operations and Condensed Consolidated Statement of Cash Flows.

Nature of the Company’s Leases - The Company has operating and finance leases for plants, yards, corporate offices, tractors, trailers and other equipment. The Company’s leases have a remaining term of less than one year to 30 years. A portion of the Company’s yard leases include an option to extend the leases for up to 5 years. The Company has included renewal options which are reasonably certain to be excised in its right-of-use asset and lease liability.

The Company’s lease payments are generally fixed. Certain equipment 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 finance leases and a corresponding finance lease obligation was recorded. Therefore, no contingent obligation is needed.

For all leases with an initial expected term of more than 12 months, the Company recorded, at the adoption date of ASC 842 or lease commencement date for leases entered into after the adoption date, a lease liability, which is the lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The Company will utilize its collateralized incremental borrowing rate commensurate to the lease term as the discount rate for its leases, unless the Company can specifically determine the lessor’s implicit rate. The incremental borrowing rate for each lease is determined based on the Company’s credit rating, adjusted for the impacts of collateral, and the lease term.

Lease Cost - The components of lease cost for the three and six months ended September 30, 2019 was as follows:

(Amounts in thousands)	Income Statement Classification	Three Months Ended September 30, 2019		Six Months Ended September 30, 2019
Operating lease cost
Operating lease cost	Cost of goods sold	$	1,179	$	2,127
Operating lease cost	General and administrative		399		489
Short-term lease cost	Cost of goods sold		588		1,324
Total operating lease cost		$	2,166	$	3,940
Finance lease cost
Amortization of right-of-use assets	Cost of goods sold		5,345		9,899
Amortization of right-of-use assets	General and administrative		361		717
Interest on lease liabilities	Interest expense		1,168		2,327
Total finance lease cost		$	6,874	$	12,943

Supplemental cash flow information related to leases for the six months ended September 30, 2019 was as follows:

(Amounts in thousands)	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,616
Operating cash flows from finance leases		2,434
Financing cash flows from finance leases		12,375
Right-of-use assets obtained in exchange for lease obligations:
Operating leases		4,774
Finance leases(a)		1,469

(a) The Company acquired $11.9 million of property, plant and equipment under finance leases in the six months ended September 30, 2018.

Supplemental balance sheet information related to leases as of September 30, 2019 was as follows:

(Amounts in thousands)	Balance Sheet Classification	2019
Operating leases
Right-of-use assets	Other assets	$	24,010
Current lease liabilities	Other accrued liabilities		6,604
Non-current lease liabilities	Other liabilities		17,340
Total operating lease liabilities		$	23,944
Finance leases
Right-of-use assets	Property, plant and equipment		102,948
Current lease liabilities	Current maturities of finance lease obligations		22,555
Non-current lease liabilities	Long-term finance lease obligations		52,746
Total finance lease liabilities		$	75,301
Weighted average lease term
Operating leases			7.18
Finance leases			10.88
Weighted average discount rate
Operating leases			3.53	%
Finance leases			4.96	%

The following is a schedule by year of future minimum lease payments on a rolling twelve-month basis under operating and finance leases and the present value of the net minimum lease payments as of September 30, 2019:

(Amounts in thousands)	Operating Leases		Finance Leases
Year 1	$	7,443	$	25,926
Year 2		6,012		21,258
Year 3		3,742		15,777
Year 4		2,409		9,722
Year 5		1,663		5,740
Thereafter		6,719		6,525
Total minimum lease payments	$	27,988	$	84,948
Less: amount representing interest		4,044		9,647
Present value of net minimum lease payments	$	23,944	$	75,301

Disclosures Related to Periods Prior to Adoption of ASC 842

As of March 31, 2019, total contractual obligations for capital and operating leases were as follows:

(Amounts in thousands)	Operating Leases		Capital Leases
2020	$	4,159	$	26,604
2021		2,924		22,507
2022		1,814		18,064
2023		690		11,721
2024		325		7,143
Thereafter		2,236		8,198
Total minimum lease payments	$	12,148	$	94,237
Less: amount representing interest		—		9,565
Present value of net minimum lease payments	$	12,148	$	84,672

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Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 8,462	$ 29,372	$ (218,989)	$ 63,023
Currency translation (loss) gain	(2,310)	2,837	(746)	(1,975)
Comprehensive income (loss)	6,152	32,209	(219,735)	61,048
Less: other comprehensive (loss) income attributable to noncontrolling interest	(353)	996	(186)	(379)
Less: net income (loss) attributable to noncontrolling interest	873	702	(222)	2,073
Total comprehensive income (loss) attributable to ADS	$ 5,632	$ 30,511	$ (219,327)	$ 59,354

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Document and Entity Information - shares	6 Months Ended
	Sep. 30, 2019	Nov. 05, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Registrant Name	ADVANCED DRAINAGE SYSTEMS, INC.
Entity Central Index Key	0001604028
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		68,272,550
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity File Number	001-36557
Entity Tax Identification Number	51-0105665
Entity Address, Address Line One	4640 Trueman Boulevard
Entity Address, City or Town	Hilliard
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43026
City Area Code	614
Local Phone Number	658-0050
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false
Title of each class	Common Stock, $0.01 par value per share
Trading Symbol(s)	WMS
Name of each exchange on which registered	NYSE

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Net Income Per Share and Stockholders' Equity

6 Months Ended

Sep. 30, 2019

Net Income Per Share And Stockholders Equity [Abstract]

Net Income Per Share and Stockholders' Equity

9. NET INCOME PER SHARE AND STOCKHOLDERS’ EQUITY

The Company is required to apply the two-class method to compute both basic and diluted net income 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 following table presents information necessary to calculate net income per share for the periods presented, 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:

	Three Months Ended September 30,						Six Months Ended September 30,
(In thousands, except per share data)	2019			2018			2019			2018
NET INCOME PER SHARE—BASIC:
Net income (loss) attributable to ADS	$	7,589		$	28,670		$	(218,767	)	$	60,950
Adjustments for:
Dividends to redeemable convertible preferred    stockholders		(1,355	)		(478	)		(8,196	)		(975	)
Dividends paid to unvested restricted stockholders		(4	)		(15	)		(330	)		(30	)
Net income (loss) available to common stockholders    and participating securities		6,230			28,177			(227,293	)		59,945
Undistributed income allocated to participating    securities		(204	)		(2,310	)		—			(5,022	)
Net income (loss) available to common    stockholders – Basic	$	6,026		$	25,867		$	(227,293	)	$	54,923
Weighted average number of common shares    outstanding – Basic		60,222			56,929			58,906			56,776
Net income (loss) per common share – Basic	$	0.10		$	0.45		$	(3.86	)	$	0.97
NET INCOME PER SHARE—DILUTED:
Net income (loss) available to common    stockholders – Diluted	$	6,026		$	25,867		$	(227,293	)	$	54,923
Weighted average number of common shares    outstanding – Basic		60,222			56,929			58,906			56,776
Assumed exercise of stock options		576			629			—			598
Restricted stock		78			—			—			—
Weighted average number of common shares    outstanding – Diluted		60,876			57,558			58,906			57,374
Net income (loss) per common share – Diluted	$	0.10		$	0.45		$	(3.86	)	$	0.96
Potentially dilutive securities excluded as    anti-dilutive		15,084			6,303			13,269			6,229

Common Stock Offering – On September 10, 2019, the Company issued and sold an aggregate of 10,350,000 shares of common stock, $0.01 par value per share, which included the full exercise of the underwriters’ option to purchase additional shares, at a price of $29.75 per share, before underwriting discounts and commissions. The common stock was sold pursuant to the Company’s shelf registration statement and related prospectus supplement. The Company received proceeds of $293.6 million from the issuance after deducting underwriting discounts and commissions and offering expenses. The Company used the net proceeds for the repayment of a portion of the outstanding borrowings under the Senior Secured Credit Facility.

Stockholders’ Equity - The Company did not repurchase any shares of common stock during the three and six months ended September 30, 2019 and 2018. In February 2017, the Company’s Board of Directors’ authorized the Company to repurchase up to $50 million of ADS common stock in accordance with applicable securities laws. As of September 30, 2019, approximately $42.1 million of common stock may be repurchased under the authorization. The repurchase program does not obligate the Company to acquire any particular amount of common stock and may be suspended or terminated at any time at the Company’s discretion.

Special Dividend and the Employees Stock Ownership Plan (“ESOP”) - During the three months ended June 30, 2019, the Board of Directors approved a special cash dividend of $1.00 per share and quarterly dividends of $0.09. The special and quarterly dividend were paid to all stockholders on June 14, 2019 to stockholders of record at the close of business on June 3, 2019. The total dividend payment was $81.6 million. The dividends

received by the unallocated redeemable convertible preferred stock held in the ESOP trust was used to pay $12.0 million of the ESOP loan back to the Company resulting in approximately 11.6 million shares of the Company’s redeemable convertible preferred stock being allocated to ESOP participants. The Company recognized $246.8 million in stock-based compensation expense based on the fair value on the date the Board of Directors approved the special dividend. The Board of Director’s approval committed the ESOP to use those proceeds to pay down the ESOP loan. The special dividend compensation expense was recognized in Cost of goods sold - ESOP special dividend compensation and Selling, general and administrative expenses - ESOP special dividend compensation on the Company’s Consolidated Statement of Operations. The Company’s ESOP is further described in “Note 16. Employee Benefit Plans” to the Company’s audited financial statements included in the Fiscal 2019 Form 10-K.

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Business Segments Information (Tables)

6 Months Ended

Sep. 30, 2019

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 for the periods presented:

	Three Months Ended
	September 30, 2019								September 30, 2018
	Net Sales			Intersegment Net Sales			Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	281,405		$	(342	)	$	281,063	$	249,380	$	—	$	249,380
Infiltrator Water Technologies		64,889			(12,189	)		52,700		—		—		—
International
International - Pipe		34,617			—			34,617		44,008		—		44,008
International - Allied Products		13,167			—			13,167		11,278		—		11,278
Total International		47,784			—			47,784		55,286		—		55,286
Allied Products & Other		114,358			—			114,358		101,889		—		101,889
Intersegment Eliminations		(12,531	)		12,531			—		—		—		—
Total Consolidated	$	495,905		$	—		$	495,905	$	406,555	$	—	$	406,555
	Six Months Ended
	September 30, 2019								September 30, 2018
	Net Sales			Intersegment Net Sales			Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	543,586		$	(342	)	$	543,244	$	491,450	$	—	$	491,450
Infiltrator Water Technologies		64,889			(12,189	)		52,700		—		—		—
International
International - Pipe		63,902			—			63,902		78,456		—		78,456
International - Allied Products		23,216			—			23,216		22,179		—		22,179
Total International		87,118			—			87,118		100,635		—		100,635
Allied Products & Other		226,551			—			226,551		202,317		—		202,317
Intersegment Eliminations		(12,531	)		12,531			—		—		—		—
Total Consolidated	$	909,613		$	—		$	909,613	$	794,402	$	—	$	794,402

Schedule of Financial Information Attributable to Reportable Segments

The following sets forth certain financial information attributable to the reportable segments for the periods presented.

	Three Months Ended September 30,					Six Months Ended September 30,
	2019			2018		2019			2018
	(In thousands)					(In thousands)
Segment adjusted gross profit
Pipe	$	74,246		$	53,561	$	131,739		$	112,027
Infiltrator Water Technologies		30,144			—		30,144			—
International		10,841			12,088		20,068			21,874
Allied Products & Other		57,621			47,160		114,808			96,172
Intersegment Elimination		(978	)		—		(978	)		—
Total	$	171,874		$	112,809	$	295,781		$	230,073
Depreciation and amortization
Pipe	$	11,557		$	11,811	$	23,104		$	24,030
Infiltrator Water Technologies		1,859			—		1,859			—
International		1,590			1,524		3,097			3,021
Allied Products & Other(a)		11,560			4,201		15,200			8,312
Total	$	26,566		$	17,536	$	43,260		$	35,363
Capital expenditures
Pipe	$	9,383		$	9,303	$	16,357		$	14,016
Infiltrator Water Technologies		3,883			—		3,883			—
International		623			816		1,877			1,808
Allied Products & Other(a)		2,010			2,306		3,505			3,475
Total	$	15,899		$	12,425	$	25,622		$	19,299

(a) Includes depreciation and amortization and capital expenditures not allocated to a reportable segment.

Reconciliation of Gross Profit to Segment Adjusted Gross Profit

Reconciliation of Gross Profit to Segment Adjusted Gross profit

	Three Months Ended September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)				(In thousands)
Reconciliation of Segment Adjusted Gross Profit:
Total Gross Profit	$	146,524	$	95,373	$	84,366	$	195,064
Depreciation and amortization		15,708		14,354		29,392		29,072
ESOP and stock-based compensation expense		3,869		3,082		7,640		5,937
ESOP special dividend compensation		—		—		168,610		—
Inventory step up related to    Infiltrator Water Technologies acquisition		5,773		—		5,773		—
Total Segment Adjusted Gross Profit	$	171,874	$	112,809	$	295,781	$	230,073

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Derivative Transactions (Tables)

6 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

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 derivatives contracts as well as net losses and net (gains) on the settlement of derivative contracts as follows:

	Three Months Ended September 30,					Six Months Ended September 30,
	2019		2018			2019			2018
	(In thousands)					(In thousands)
Diesel fuel option collars	$	7	$	154		$	76		$	142
Interest rate swaps		—		(430	)		1,726			(1,043	)
Foreign exchange forward contracts		—		—			(7	)		—
Total net unrealized mark-to-market (gains) loss	$	7	$	(276	)	$	1,795		$	(901	)
Diesel fuel option collars		150		(266	)		157			(574	)
Foreign exchange forward contracts		102		(39	)		102			(90	)
Interest rate swaps		710		(67	)		544			(92	)
Total net realized loss (gains)	$	962	$	(372	)	$	803		$	(755	)

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Income Taxes

6 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

13. INCOME TAXES

The Company’s effective tax rate will vary based on a variety of factors, including overall profitability, the geographical mix of income before taxes and related tax rates in jurisdictions where it operates and other one-time charges, as well as discrete events. For the three months ended September 30, 2019 and 2018, the Company utilized an effective tax rate of (75.3%) and 28.9%, respectively, to calculate its provision for income taxes. The decrease in the effective tax rate is primarily driven by the nearly break-even pre-tax income in the second quarter of fiscal 2020 compared to the second quarter of fiscal 2019 and the changes to the Company’s projected annual effective tax rate. The change in the Company’s projected annual effective tax rate was due to the financial results of the recent acquisition of Infiltrator Water Technologies. Further, the Company recognized additional expense of approximately $1.1 million related to non-deductible transaction costs. Consistent with the three months ended September 30, 2018, state and local income taxes and the Company’s ESOP increased the rate for the three months ended September 30, 2019.

For the six months ended September 30, 2019 and 2018, the Company utilized an effective tax rate of (9.4%) and 29.4%, respectively, to calculate its provision for income taxes. In addition to the special dividend made on June 14, 2019, there were additional transaction costs related to the Infiltrator Acquisition noted above, that attributed to large pretax losses for the six months ended September 30, 2019, that did not occur in the comparison period. Consistent with the six months ended September 30, 2018, state and local income taxes and the Company’s ESOP increased the rate for the six months ended September 30, 2019. Additionally, the effective tax rate for the six months ended September 30, 2019 differed from the federal statutory rate primarily due to a $60.7 million discrete income tax expense. This discrete event related to the 11.6 million shares allocated from the ESOP as a result of the special dividend made on June 14, 2019 and the Company recognizing approximately $246.8 million in additional stock-based compensation expense. Of the total stock-

based compensation expense, approximately $237.6 million related to non-deductible stock appreciation. This discrete event reduced the effective tax rate by 30.3%.

As discussed in “Note 3. Acquisitions”, the Company acquired Infiltrator Water Technologies on July 31, 2019. The unrecognized tax benefits increased by $1.4 million during the quarter, related to positions taken by Infiltrator Water Technologies prior to the Acquisition. Infiltrator Water Technologies was previously indemnified for this position, and based on the nature of the Acquisition, the indemnification is still in place. Lastly, as part of the purchase price, approximately $109.9 million was attributed to deferred tax liabilities. Of the $109.9 million, $59.8 million related to the step up of GAAP basis for fair market valuations, while the remaining $50.1 million were acquired deferred tax liabilities. Of the total $59.8 million, $55.7 million was attributed to intangibles.

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Background and Summary of Significant Accounting Policies (Policies)

6 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation - The Company prepares its Condensed Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Condensed Consolidated Balance Sheet as of March 31, 2019 was derived from audited financial statements included in the Annual Report on Form 10-K for the year ended March 31, 2019 (“Fiscal 2019 Form 10-K”). The accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments, of a normal recurring nature, necessary to present fairly its financial position as of September 30, 2019 and the results of operations and cash flows for the three and six months ended September 30, 2019. The interim Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, filed in the Company’s Fiscal 2019 Form 10-K.

Principles of Consolidation

Principles of Consolidation - The Condensed 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 Condensed Consolidated Balance Sheets and the related equity earnings from these investments are included in Equity in net loss of unconsolidated affiliates in the Condensed Consolidated Statements of Operations. All intercompany balances and transactions have been eliminated in consolidation.

Recent Accounting Guidance

Recent Accounting Guidance

Recently Adopted Accounting Guidance

Leases - In February 2016, the Financial Accounting Standards Board (the “FASB”) issued an accounting standard update (“ASU”) which amends the guidance for leases (“ASC 842”). This standard 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 standard 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. In July 2018, the FASB amended ASC 842 to provide another transition method, allowing a cumulative effect adjustment to the opening balance of retained earnings during the period of adoption. The Company adopted these standards effective April 1, 2019 using the transition method in the July 2018 ASU which does not require adjustments to comparative periods or require modified disclosures for those periods and includes transition relief practical expedients. “Note 5. Leases” for further information on the adoption of the new lease ASUs.

Hedge Accounting - In August 2017, the FASB issued an ASU which expanded an entity’s ability to apply hedge accounting for non-financial and financial risk components and provided a simplified approach for fair value hedging of interest rate risk. The standard also refined how entities assess hedge effectiveness. The Company adopted this standard effective April 1, 2019. The new standard did not have an impact on the Condensed Consolidated Financial Statements.

Recent Accounting Guidance Not Yet Adopted

Measurement of Credit Losses - In June 2016, the FASB issued an ASU which provides amended guidance on the measurement of credit losses on financial instruments, including trade receivables. This standard requires the use of an impairment model referred to as the current expected credit loss model. This standard 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 Condensed Consolidated Financial Statements.

Except for the pronouncements described above, there have been no new accounting pronouncements issued or adopted since the filing of the Fiscal 2019 Form 10-K that have significance, or potential significance, to the Condensed Consolidated Financial Statements.

Leases

ASC 842 Adoption - The Company adopted the provisions of ASC 842 beginning on April 1, 2019 using the transition methodology in ASC 842 which does not require adjustments to comparative periods or require modified disclosures. The Company elected the transition relief practical expedient package as described in ASC 842-10-65-1. ASC 842 provides lessees with the option of electing an accounting policy, by class of underlying asset, in which the lessee may choose not to separate nonlease components from lease components. The Company elected this practical expedient for leases of certain classes of equipment, including forklifts and fleet tractors and trailers. The Company also elected the accounting policy to not recognize the right-of-use asset and lease liability for leases with an initial expected term of 12 months or less (“Short-term leases”). The adoption of ASC 842 resulted in the recording of $13.3 million of additional lease liabilities and right-of-use assets to the beginning balance of the Company’s Condensed Consolidated Balance Sheet. Infiltrator Water Technologies adopted ASC 842 on July 31, 2019 using the same methodology and policy elections taken by the Company on April 1, 2019. The Infiltrator Water Technologies adoption of ASC 842 resulted in the recording of $11.2 million of additional lease liabilities and corresponding right-of-use assets to the beginning balance of the Company’s Condensed Consolidated Balance Sheet as of September 30, 2019. The adoption did not have an impact on the Company’s Condensed Consolidated Statement of Operations and Condensed Consolidated Statement of Cash Flows.

Nature of the Company’s Leases - The Company has operating and finance leases for plants, yards, corporate offices, tractors, trailers and other equipment. The Company’s leases have a remaining term of less than one year to 30 years. A portion of the Company’s yard leases include an option to extend the leases for up to 5 years. The Company has included renewal options which are reasonably certain to be excised in its right-of-use asset and lease liability.

The Company’s lease payments are generally fixed. Certain equipment 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 finance leases and a corresponding finance lease obligation was recorded. Therefore, no contingent obligation is needed.

For all leases with an initial expected term of more than 12 months, the Company recorded, at the adoption date of ASC 842 or lease commencement date for leases entered into after the adoption date, a lease liability, which is the lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The Company will utilize its collateralized incremental borrowing rate commensurate to the lease term as the discount rate for its leases, unless the Company can specifically determine the lessor’s implicit rate. The incremental borrowing rate for each lease is determined based on the Company’s credit rating, adjusted for the impacts of collateral, and the lease term.

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Leases - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Sep. 30, 2019	Apr. 01, 2019
Minimum [Member]
Lessee Lease Description [Line Items]
Leases remaining term	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Leases remaining term	30 years
Maximum [Member] | Yard [Member]
Lessee Lease Description [Line Items]
Leases options to extend	5 years
ASC 842 Adoption [Member]
Lessee Lease Description [Line Items]
Additional lease liabilities		$ 13.3
Right-of-use assets		$ 13.3
ASC 842 Adoption [Member] | Infiltrator Water Technologies [Member]
Lessee Lease Description [Line Items]
Additional lease liabilities	$ 11.2
Right-of-use assets	$ 11.2

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Acquisitions - Summary of Consideration Transferred and Preliminary Purchase Price Allocation of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jul. 31, 2019	Mar. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 669,753		$ 102,638
IWT [Member]
Business Acquisition [Line Items]
Cash		$ 57,375
Total current assets, excluding cash		75,847
Property, plant and equipment, net		98,860
Goodwill		567,034
Intangible assets, net		475,000
Other assets		14,366
Total current liabilities		(22,756)
Deferred tax liabilities		(109,926)
Other liabilities		(9,274)
Total fair value of consideration transferred		$ 1,146,526

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Net Income Per Share and Stockholders' Equity - Summary of Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
NET INCOME PER SHARE—BASIC:
Net income (loss) attributable to ADS	$ 7,589	$ 28,670	$ (218,767)	$ 60,950
Dividends to redeemable convertible preferred stockholders	(1,355)	(478)	(8,196)	(975)
Dividends paid to unvested restricted stockholders	(4)	(15)	(330)	(30)
Net income (loss) available to common stockholders and participating securities	6,230	28,177	(227,293)	59,945
Undistributed income allocated to participating securities	(204)	(2,310)		(5,022)
Net income (loss) available to common stockholders – Basic	$ 6,026	$ 25,867	$ (227,293)	$ 54,923
Weighted average number of common shares outstanding – Basic	60,222	56,929	58,906	56,776
Net income (loss) per common share – Basic	$ 0.10	$ 0.45	$ (3.86)	$ 0.97
NET INCOME PER SHARE—DILUTED:
Net income (loss) available to common stockholders – Diluted	$ 6,026	$ 25,867	$ (227,293)	$ 54,923
Weighted average number of common shares outstanding – Basic	60,222	56,929	58,906	56,776
Weighted average number of common shares outstanding – Diluted	60,876	57,558	58,906	57,374
Net income (loss) per common share – Diluted	$ 0.10	$ 0.45	$ (3.86)	$ 0.96
Potentially dilutive securities excluded as anti-dilutive	15,084	6,303	13,269	6,229
Exercise of Stock Options [Member]
NET INCOME PER SHARE—DILUTED:
Dilutive securities	576	629		598
Restricted Stock [Member]
NET INCOME PER SHARE—DILUTED:
Dilutive securities	78

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Debt (Bridge Credit Facility) - Additional Information (Detail) - USD ($)					6 Months Ended
	Sep. 24, 2019	Sep. 23, 2019	Sep. 10, 2019	Jul. 31, 2019	Sep. 30, 2019
Debt Instrument [Line Items]
Repayment of borrowings					$ 177,900,000
Repayment of notes					1,300,000,000
Proceeds from Senior Notes					350,000,000
Principal payment from common stock offering			$ 300,000,000.0		293,648,000
5.0% Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Aggregate principal amount		$ 350,000,000.0
Deferred financing fees capitalized					2,100,000
Bridge Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings permitted under credit facility				$ 350,000,000
Amount borrowed				145,000,000
Letter of Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings permitted under credit facility	$ 50,000,000			50,000,000
Sublimit of Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings permitted under credit facility	50,000,000			50,000,000
Bridge Credit Facility [Member]
Debt Instrument [Line Items]
Repayment of borrowings			$ 300,000,000.0
Deferred financing fees capitalized				46,900,000
Decrease in deferred financing costs due to refunds received				14,900,000
Senior Secured Credit Facility
Debt Instrument [Line Items]
Proceeds from Senior Notes	700,000,000
Deferred financing fees capitalized	$ 400,000
Bridge Loan Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount				1,300,000,000
Amount borrowed				$ 1,300,000,000
Repayment of notes		300,000,000.0
Bridge Loan Facility [Member] | 5.0% Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Repayment of notes		300,000,000.0
Proceeds from Senior Notes		$ 300,000,000.0			$ 350,000,000.0

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Debt (New Senior Secured Credit Facility) - Additional Information (Detail) - USD ($)		6 Months Ended
	Sep. 24, 2019	Sep. 30, 2019	Jul. 31, 2019	Mar. 31, 2019
Term Loan Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount	$ 700,000,000
Debt instrument term	7 years
Bridge Credit Facility [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity	$ 700,000,000
Deferred financing fees capitalized			$ 46,900,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings permitted under credit facility	$ 350,000,000
Letters of credit outstanding		$ 8,500,000		$ 8,500,000
Debt instrument term	5 years
Commitment fee on undrawn portion, percentage		0.20%
Letter of Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings permitted under credit facility	$ 50,000,000		50,000,000
Sublimit of Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings permitted under credit facility	50,000,000		$ 50,000,000
Senior Secured Credit Facility
Debt Instrument [Line Items]
Deferred financing fees capitalized	$ 400,000