KMG Chemicals 10-Q 11 Jun 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Apr. 30, 2018	Jun. 05, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	KMG
Entity Registrant Name	KMG CHEMICALS INC
Entity Central Index Key	1,028,215
Current Fiscal Year End Date	--07-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		15,507,485

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Apr. 30, 2018	Jul. 31, 2017
Current assets
Cash and cash equivalents		$ 21,818	$ 20,708
Accounts receivable
Trade, net of allowances of $235 at April 30, 2018 and $263 at July 31, 2017		59,422	51,168
Other		7,176	6,168
Inventories, net		54,087	46,482
Prepaid expenses and other		4,305	8,617
Total current assets		146,808	133,143
Property, plant and equipment, net	[1]	114,640	105,435
Goodwill		227,797	224,391
Intangible assets, net		303,318	320,401
Other assets, net		12,744	9,061
Total assets		805,307	792,431
Current liabilities
Accounts payable		37,907	29,570
Accrued liabilities		10,884	12,456
Employee incentive accrual		5,574	7,713
Current portion of long-term debt			3,167
Total current liabilities		54,365	52,906
Long-term debt, net		323,550	523,102
Deferred tax liabilities		23,243	37,944
Other long-term liabilities		5,446	4,763
Total liabilities		406,604	618,715
Commitments and contingencies
Stockholders’ equity
Preferred stock, $0.01 par value, 10,000,000 shares authorized, none issued
Common stock, $0.01 par value, 40,000,000 shares authorized, 15,505,350 shares issued and outstanding at April 30, 2018 and 11,889,649 shares issued and outstanding at July 31, 2017		155	119
Additional paid-in capital		220,094	42,535
Accumulated other comprehensive loss		(7,864)	(9,712)
Retained earnings		186,318	140,774
Total stockholders’ equity		398,703	173,716
Total liabilities and stockholders’ equity		$ 805,307	$ 792,431
[1]	In fiscal year 2016, the Company classified one of its Milan production facilities as assets held for sale, and reclassified $4.3 million into other current assets. In April 2018, the Company reclassified these assets to held and used, and accordingly recognized depreciation expense of $0.1 million. The Company plans to use the facility for storage.

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2018	Jul. 31, 2017
Statement Of Financial Position [Abstract]
Allowances for accounts receivables	$ 235	$ 263
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	15,505,350	11,889,649
Common stock, shares outstanding	15,505,350	11,889,649

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Income Statement [Abstract]
Net sales	$ 118,647	$ 81,616	$ 343,162	$ 237,182
Cost of sales	68,156	49,106	196,936	143,787
Gross profit	50,491	32,510	146,226	93,395
Distribution expenses	9,070	9,457	27,192	28,329
Selling, general and administrative expenses	13,601	13,008	41,939	36,241
Amortization of intangible assets	3,867	608	11,263	1,668
Restructuring charges		70	69	70
Operating income	23,953	9,367	65,763	27,087
Other (expense) income
Interest expense, net	(4,153)	(301)	(17,333)	(650)
Loss on the extinguishment of debt	(277)		(6,368)
Derivative fair value gain	1,365		5,238
Other, net	(200)	144	(977)	88
Total other expense, net	(3,265)	(157)	(19,440)	(562)
Income before income taxes	20,688	9,210	46,323	26,525
Provision for income taxes	(5,043)	(3,143)	509	(8,232)
Net income	$ 15,645	$ 6,067	$ 46,832	$ 18,293
Earnings per share
Net income per common share basic	$ 1.01	$ 0.51	$ 3.24	$ 1.54
Net income per common share diluted	$ 0.98	$ 0.49	$ 3.16	$ 1.50
Weighted average shares outstanding
Basic	15,505	11,888	14,439	11,884
Diluted	15,905	12,303	14,814	12,236

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 15,645	$ 6,067	$ 46,832	$ 18,293
Other comprehensive income
Foreign currency translation gain (loss)	(2,643)	467	1,847	(2,204)
Total comprehensive income	$ 13,002	$ 6,534	$ 48,679	$ 16,089

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Cash flows from operating activities
Net income	$ 46,832	$ 18,293
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	22,359	10,864
Loss on extinguishment of debt	6,368
Stock-based compensation expense	5,687	4,280
Amortization of debt discounts and financing costs included in interest expense	1,124	125
Debt repricing transaction costs	607
Deferred income tax benefit	(9,097)	(1,189)
Derivative fair value gain	(5,238)
Other	(65)	(935)
Changes in operating assets and liabilities
Accounts receivable — trade	(7,664)	(3,172)
Accounts receivable — other	(50)	2,253
Inventories	(7,238)	606
Other current and noncurrent assets	(715)	(1,062)
Accounts payable	8,194	(1,282)
Accrued liabilities and other	(3,349)	(1,444)
Net cash provided by operating activities	57,755	27,337
Cash flows from investing activities
Additions to property, plant and equipment	(15,527)	(8,586)
Purchase of Sealweld, net of cash acquired	(585)	(16,584)
Other investing activities	(577)
Proceeds — insurance claim		1,247
Net cash used in investing activities	(16,689)	(23,923)
Cash flows from financing activities
Proceeds from sale of common stock, net of issuance costs	175,669
Borrowings under credit facility		17,000
Payments under credit facility		(18,800)
Principal payments on borrowings on term loan	(210,000)
Debt repricing transaction costs	(607)
Payment of dividends	(1,288)	(1,066)
Cash payments related to tax withholdings from stock-based awards	(3,729)	(277)
Net cash used in financing activities	(39,955)	(3,143)
Effect of exchange rate changes on cash	(1)	398
Net increase in cash, cash equivalents and restricted cash	1,110	669
Cash, cash equivalents and restricted cash at beginning of period	20,708	13,428
Cash, cash equivalents and restricted cash at end of period	21,818	14,097
Supplemental disclosures of cash flow information
Cash paid for interest	15,618	414
Cash paid for income taxes, net	5,013	7,421
Supplemental disclosure of non-cash investing activities
Purchase of property, plant and equipment through accounts payable	$ 1,087	$ 412

Basis of Presentation

Basis of Presentation	9 Months Ended
	Apr. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The condensed consolidated balance sheet as of July 31, 2017, which has been derived from audited consolidated financial statements, and the unaudited condensed consolidated financial statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission for interim reporting. As permitted under those requirements, certain footnotes or other financial information that are normally required by generally accepted accounting principles in the United States of America (“GAAP”) have been condensed or omitted. The Company believes that the disclosures made are adequate to make the information not misleading and in the opinion of management reflect all adjustments, including those of a normal recurring nature, that are necessary for a fair presentation of financial position and results of operations for the interim periods presented. Certain reclassifications of prior year amounts have been made to conform to current year presentation. These reclassifications had no impact on net income or total stockholders’ equity as previously reported. These condensed consolidated financial statements are prepared using certain estimates by management and include the accounts of KMG Chemicals, Inc. and its subsidiaries (collectively, the “Company”). All significant intercompany balances and transactions have been eliminated in consolidation. The following table provides a brief description of recent Accounting Standard Updates (“ASU”) issued by the Financial Accounting Standards Board (“FASB”): Standard Description Effective Date Effect on the Financial Statements or Other Significant Matters In August 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities. The new guidance improves the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. August 1, 2019. Early adoption is permitted. The Company is currently evaluating the impact of adoption on its financial statements and related disclosures, but does not expect adoption will have a material impact as the Company does not currently utilize hedge accounting for derivative instruments. In January 2017, the FASB issued ASU 2017-04, Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment. The new guidance simplifies subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. August 1, 2020. Early adoption is permitted. The Company adopted the new guidance as of August 1, 2017, as part of the FASB's simplification initiative. The adoption of the new guidance did not have an impact to the Company. In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments The new guidance changes the impairment model for most financial assets and certain other instruments, including trade and other receivables, held-to-maturity debt securities and loans, and requires entities to use a new forward-looking expected loss model that will result in the earlier recognition of allowance for losses. August 1, 2020. Early adoption is permitted. The Company does not expect adoption will have a material impact on its condensed consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-02, Leases. The new guidance supersedes the lease guidance under FASB Accounting Standards Codification ("ASC") Topic 840, Leases, resulting in the creation of FASB ASC Topic 842, Leases. The guidance requires a lessee to recognize in the statement of financial position a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term for both finance and operating leases. August 1, 2019. Early adoption is permitted. The Company is currently evaluating its population of leases, and is continuing to assess all potential impacts of the standard, but currently believes the most significant impact relates to its accounting for manufacturing and logistics equipment, and real estate operating leases. The Company anticipates recognition of additional assets and corresponding liabilities related to leases upon adoption, but cannot quantify these at this time. The Company plans to adopt the standard effective August 1, 2019. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. Since that date, the FASB has issued additional ASUs clarifying certain aspects of ASU 2014-09. The new guidance requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The new guidance provides alternative methods of adoption. Subsequent guidance issued after May 2014 did not change the core principle of ASU 2014-09. August 1, 2018. The Company has substantially completed its assessment of significant revenue contracts and the guidance is not expected to have significant impacts on its condensed consolidated financial statements. The Company is still evaluating the required changes in disclosure for the footnotes to the condensed consolidated financial statements. The Company plans to adopt the revenue guidance effective August 1, 2018, and expects to utilize the modified retrospective method of adoption.

Acquisitions

Acquisitions	9 Months Ended
	Apr. 30, 2018
Business Combinations [Abstract]
Acquisitions	2. Acquisitions On June 15, 2017, the Company completed the acquisition of Flowchem Holdings LLC (“Flowchem”). The consideration paid on the closing date was the purchase price of $495.0 million plus $11.4 million for cash acquired. Based in Waller, Texas, Flowchem is The Company has accounted for the purchase using the acquisition method of accounting for business combinations. Accordingly, the purchase price has been allocated to the underlying assets and liabilities in proportion to their respective fair values Cash $ 11,445 Accounts receivable 11,280 Inventory 9,310 Other assets 499 Property, plant and equipment, net 19,665 Intangible assets Customer relationships 205,467 Trade names and trademark 32,353 Proprietary manufacturing process 39,323 Total assets $ 329,342 Current liabilities 3,132 Deferred tax liability 22,238 Net identifiable assets acquired 303,972 Goodwill 202,471 Fair value of net assets acquired $ 506,443 This purchase price allocation is preliminary and is pending the final accounting for the state and local tax liabilities, deferred taxes and goodwill acquired June 15, 2017, as the Company has not yet finalized the detailed valuation analyses as of April 30, 2018. The fair value of the accounts receivable acquired was $11.3 million, equivalent to the amount the Company expects to be collected. The $202.5 million of goodwill was assigned to the performance materials segment, and the Company expects $155.9 million of goodwill to be tax deductible. The goodwill is primarily attributable to the assembled workforce of Flowchem and the allocation of proceeds in excess of the fair value of net identifiable assets acquired. During the nine months ended April 30, 2018, measurement period adjustments were made to the preliminary purchase price allocation recorded in the consolidated financial statements for the fiscal year ended July 31, 2017. The acquired intangible assets, deferred tax liabilities and goodwill were adjusted as a result of additional analyses performed on the estimates used in the calculation of the fair value of the assets acquired and liabilities assumed. The measurement period adjustments to the amortizable intangible assets resulted in an immaterial reduction in the amortization expense recognized in the Company’s condensed consolidated statements of income for the three months ended October 31, 2017, and a reduction in the estimated amortization expense going forward. The Company further recorded measurement period adjustments in the third quarter of fiscal year 2018 to the acquired deferred tax assets and liabilities as a result of further analyses performed over Flowchem’s tax attributes as of the date of the business combination, which reduced the recognized goodwill. Measurement April 30, 2018 Period Adjustment July 31, 2017 Customer relationships $ 205,467 $ (9,415 ) $ 214,882 Trade names and trademarks 32,353 3,402 28,951 Proprietary manufacturing process 39,323 78 39,245 Deferred tax liability 22,238 (2,808 ) 25,046 Goodwill 202,471 3,125 199,346 On February 1, 2017, the Company completed the acquisition of the assets of Sealweld Corporation (“Sealweld”), a privately held corporation organized under the laws of the Province of Alberta, Canada, for CAD$22.3 million in cash (or approximately US$17.2 million, at an exchange rate of 0.77 CAD$ to US$ at February 1, 2017), which included CAD$5.5 million (or approximately US$4.2 million, at an exchange rate of 0.77 CAD$ to US$ at February 1, 2017) for estimated working capital. Sealweld is based in Calgary, Alberta, Canada, with additional facilities in the United States and the United Arab Emirates. Sealweld is a global supplier of high-performance products and services for industrial valve and actuator maintenance, including lubricants, sealants, cleaners, valve fittings, tools and equipment. Additionally, Sealweld provides routine and emergency valve maintenance services and technician training for many of the world’s largest pipeline operators. The Company completed the acquisition by borrowing $17.0 million on the revolving loan under its revolving credit facility. See Note 11 for further discussion of the Company’s revolving credit facility. Sealweld is included in the performance materials segment. The Company expensed transaction and acquisition-related costs of approximately $0.1 million in the nine months ended April 30, 2018, which is included in selling, general and administrative expenses on the Company’s condensed consolidated statement of income. The following table summarizes the acquired assets and assumed liabilities and the final acquisition accounting for the fair value of the assets and liabilities recognized in the condensed consolidated balance sheet at April 30, 2018 (in thousands): Cash $ 69 Accounts receivable 2,937 Inventory 2,350 Other assets 38 Property, plant and equipment, net 4,192 Intangible assets — Trade name/trademark 2,185 Non-compete agreements 2,254 Customer relationships 2,348 Total assets acquired $ 16,373 Current liabilities 1,272 Deferred taxes 681 Net identifiable assets acquired 14,420 Goodwill 2,771 Fair value of net assets acquired $ 17,191 This purchase price allocation is final. The fair value of the accounts receivable acquired was $2.9 million, equivalent to the contractual amount acquired. The Company collected substantially all acquired accounts receivable. During the fiscal quarter ended January 31, 2018, the Company recorded a measurement period adjustment of $0.1 million to the acquired current liabilities as a result of the identification of certain tax liabilities existing at the date of the acquisition. As a result of the measurement period adjustment, the Company increased goodwill from $2.7 million to $2.8 million. The goodwill was assigned to the performance materials segment, and the Company expects $0.1 million of goodwill to be tax deductible. The goodwill is primarily attributable to the assembled workforce of Sealweld.

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash	9 Months Ended
	Apr. 30, 2018
Cash And Cash Equivalents [Abstract]
Cash, Cash Equivalents and Restricted Cash	3. Cash, Cash Equivalents and Restricted Cash The Company’s restricted cash includes cash balances which are legally or contractually restricted to use. The Company did not have any restricted cash balances requiring reconciliation to amounts used on the unaudited condensed consolidated statements of cash flows, as proceeds that were placed in escrow in connection with the sale of the animal health business in fiscal year 2013 were released from escrow in February 2017.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Apr. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	4. Earnings Per Share Basic earnings per share have been computed by dividing net income by the weighted average shares outstanding. Diluted earnings per share have been computed by dividing net income by the weighted average shares outstanding plus potentially dilutive common shares. There were approximately 399,701 and 374,903 dilutive shares related to stock-based awards for the three and nine months ended April 30, 2018, respectively. There were approximately 415,661 and 352,755 dilutive shares related to stock-based awards for the three and nine months ended April 30, 2017, respectively. Outstanding stock-based awards are not included in the computation of diluted earnings per share under the treasury stock method if the effect of including them would be antidilutive. There were 3,600 and 4,920 potentially dilutive securities that were not included in the computation of diluted earnings per share for the three and nine months ended April 30, 2018, respectively. There were 415 and 3,858 potentially dilutive securities that were not included for the three and nine months ended April 30, 2017, respectively. On October 23, 2017, the Company completed an underwritten public offering of 3,450,000 shares of its common stock, including 450,000 shares issued pursuant to the underwriters’ exercise of their option to purchase additional shares, at a public offering price of $54 per share, resulting in estimated net proceeds of approximately $175.7 million after deducting underwriting commissions and estimated offering expenses.

Inventories, Net

Inventories, Net	9 Months Ended
	Apr. 30, 2018
Inventory Disclosure [Abstract]
Inventories, Net	5. Inventories, net Inventories, net are summarized in the following table (in thousands): April 30, July 31, 2018 2017 Raw materials $ 12,802 $ 9,124 Work in process 3,531 3,763 Supplies 922 884 Finished products 37,478 33,341 Less: reserve for inventory obsolescence (646 ) (630 ) Inventories, net $ 54,087 $ 46,482

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Apr. 30, 2018
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	6. Property, Plant and Equipment Property, plant and equipment and related accumulated depreciation and amortization are summarized as follows (in thousands): April 30, July 31, 2018 2017 Land $ 16,792 $ 12,632 Buildings and improvements 53,699 50,973 Equipment 116,672 106,379 Leasehold improvements 2,777 2,755 189,940 172,739 Less: accumulated depreciation and amortization (88,827 ) (76,974 ) 101,113 95,765 Construction-in-progress 13,527 9,670 Property, plant and equipment, net (1) $ 114,640 $ 105,435 (1) In fiscal year 2016, the Company classified one of its Milan production facilities as assets held for sale, and reclassified $4.3 million into other current assets. In April 2018, the Company reclassified these assets to held and used, and accordingly recognized depreciation expense of $0.1 million. The Company plans to use the facility for storage.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Apr. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	7. Stock-Based Compensation The Company has stock-based incentive plans which are described in more detail in the consolidated financial statements in the Company’s Annual Report on Form 10-K for fiscal year 2017. The Company recognized stock-based compensation costs of approximately $2.1 million and $1.2 million for the three months ended April 30, 2018 and 2017, respectively, and $5.7 million and $4.3 million for the nine months ended April 30, 2018 and 2017, respectively. The Company also recognized the related tax benefits of $0.6 million and $0.4 million for the three months ended April 30, 2018 and 2017, respectively, and $1.5 million and $1.5 million for the nine months ended April 30, 2018 and 2017, respectively. Stock‑based compensation costs are recorded under selling, general and administrative expenses in the condensed consolidated statements of income. As of April 30, 2018, the unrecognized compensation costs related to stock-based awards was approximately $9.6 million, which is expected to be recognized over a weighted-average period of 1.7 years. Performance-Based Stock Awards There were 467,438 and 373,698 non-vested performance-based restricted stock unit (“RSU”) awards outstanding at April 30, 2018 and August 1, 2017, respectively, which reflected the number of RSUs granted under outstanding awards that were expected to vest as of such dates. There were no performance-based RSU awards that vested during the nine months ended April 30, 2018. As of April 30, 2018, the non-vested performance-based RSU awards consisted of Series 1, Series 3 and Series 4 awards granted to certain executives and employees in fiscal years 2018, 2017 and 2016 as summarized below reflecting the target number of RSUs under the awards. Upon vesting, each RSU is converted to one share of common stock. Target Expected Shares Series Award Grant Date Measurement Percentage Expected Date of Grant Award Shares Fair Value Period Vesting (1) to Vest Fiscal Year 2018 Awards 12/5/2017 Series 4, Tranche 1 27,541 $ 54.09 7/31/2020 Forfeitures (2) (2,291 ) Total 25,250 100 % 25,250 12/5/2017 Series 4, Tranche 2 27,542 $ 54.09 7/31/2020 Forfeitures (2) (2,291 ) Total 25,251 172 % 43,431 12/5/2017 Series 3 14,000 $ 54.09 7/31/2018 100 % 14,000 2/5/2018 Series 1 7,287 $ 60.22 7/31/2020 4/5/2018 Series 1 100 $ 60.93 7/31/2020 Forfeitures (2) (50 ) Total 7,337 172 % 12,619 Fiscal Year 2017 Awards 12/8/2016 Series 1 10,531 Forfeitures (2) (838 ) Total 9,693 $ 34.95 7/31/2019 184 % 17,871 4/28/2017 Series 4, Tranche 1 4,545 $ 52.55 7/31/2019 10/21/2016 Series 4, Tranche 1 44,337 $ 29.11 7/31/2019 Forfeitures (2) (8,442 ) Total 40,440 100 % 40,440 4/28/2017 Series 4, Tranche 2 4,546 $ 52.55 7/31/2019 10/21/2016 Series 4, Tranche 2 44,337 $ 29.11 7/31/2019 Forfeitures (2) (8,442 ) Total 40,441 184 % 74,561 Fiscal Year 2016 Awards 3/10/2016 Series 1 14,625 $ 21.89 10/31/2018 1/29/2016 Series 1 57,163 $ 21.80 10/31/2018 Forfeitures (2) (13,733 ) Total 58,055 196 % 114,030 1/19/2016 Series 3 82,938 $ 20.89 7/31/2020 151 % 125,236 (1) The percentage vesting for performance-based RSU awards is currently estimated at 172%, 184% and 196% of the target award for Series 1 awards granted in fiscal years 2018, 2017 and 2016, respectively, 100% and 151% of the target award for Series 3 awards granted in fiscal years 2018 and 2016, respectively, 100% and 172% of the target award for the first and second tranches, respectively, of the Series 4 awards granted in fiscal year 2018, and 100% and 184% of the target award for the first and second tranches, respectively, of the Series 4 awards granted in fiscal year 2017. (2) Forfeitures include Series 1 and Series 4 awards that were granted to certain employees in fiscal years 2018, 2017 and 2016 but that were forfeited at the termination of their employment. Series 1: For the fiscal year 2018, 2017 and 2016 awards, vesting is subject to performance requirements composed of certain objectives including average annual return on invested capital and annual compound growth rate in the Company’s diluted earnings per share. These objectives are assessed quarterly using the Company’s budget, actual results and long-term projections. For each of the Series 1 awards, the expected percentage of vesting is evaluated through April 30, 2018, and reflects the percentage of RSUs projected to vest for the respective awards at the end of their measurement periods. For the fiscal year 2018, 2017 and 2016 awards, the awards may vest at a maximum of 200% of the target award on achievement of maximum performance objectives. Series 3: In fiscal year 2018, Mr. Fraser was awarded (i) a performance-based Series 3 award for 10,000 RSUs having a performance requirement related to debt payments during the fiscal year, and (ii) a performance-based Series 3 award for 4,000 RSUs having certain organizational objectives as a performance requirement, and in each case such awards vest and are measured over a one year period beginning August 1 and ending July 31. These awards are expected to vest at 100% of the target award. Series 4: For the fiscal year 2018 and 2017 awards, each award includes two tranches, with each tranche representing 50% of the target award. For the first tranche, vesting is subject to the achievement of an adjusted earnings before interest, taxes and depreciation and amortization (“EBITDA”) metric. For the second tranche, vesting is subject to performance requirements for average annual return on invested capital and annual compound growth rate in the Company’s diluted earnings per share. These objectives are assessed quarterly using the Company’s budget, actual results and long-term projections. For each of the Series 4 awards, the expected percentage vesting is evaluated through April 30, 2018, and reflects the percentage of RSUs projected to vest at the end of the measurement period. For the fiscal year 2018 and 2017 awards, the second tranche may vest at a maximum of 200% of the target award on achievement of maximum performance objectives. The weighted-average per share grant-date fair value of the target award RSUs for performance-based awards outstanding was $31.27 and $25.49 at April 30, 2018 and August 1, 2017, respectively. The weighted-average per share grant-date fair value of the target award RSUs for performance-based awards granted during the nine months ended April 30, 2018 and 2017 was $54.68 and $31.55, respectively. There were 76,470 performance-based RSU awards granted during the nine months ended April 30, 2018. The weighted-average per share grant-date fair value of performance-based awards forfeited during the nine months ended April 30, 2018 and 2017 was $37.49 and $22.97, respectively. Time-Based Stock Awards A summary of activity for time-based stock awards for the nine months ended April 30, 2018 is presented below: Shares Weighted-Average Grant-Date Fair Value Non-vested on August 1, 2017 173,603 $ 24.37 Granted (1) 30,640 59.90 Vested (2) (17,807 ) 40.36 Forfeited (1,371 ) 27.73 Non-vested on April 30, 2018 185,065 28.69 (1) Includes 6,235 shares granted to non-employee directors for service during the nine months ended April 30, 2018. Includes 24,405 time-based RSU awards granted to certain employees and executives. (2) Includes 6,235 shares granted to non-employee directors for service for the nine months ended April 30, 2018. The shares vest on the date of grant, and the Company recognizes compensation expense on such date. Includes 11,572 time-based RSU awards granted to certain employees and executives, and the Company recognizes compensation expense related to the awards over the respective service periods in accordance with GAAP. Upon vesting, each RSU was converted to one share of common stock. The total fair value of time-based stock awards vested during the nine months ended April 30, 2018 and 2017 was approximately $0.7 million and $0.6 million, respectively.

Intangible Assets

Intangible Assets	9 Months Ended
	Apr. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	8. Intangible Assets Intangible assets are summarized as follows (in thousands): Number April 30, 2018 Weighted Foreign Average Currency Amortization Original Accumulated Translation Carrying Period Cost Amortization Adjustment Amount Intangible assets subject to amortization (range of useful life): Electronic chemicals-value of product qualifications (5-15 years) 14.1 $ 14,100 $ (6,135 ) $ (636 ) $ 7,329 Performance materials-customer relationships (15-20 years) 19.7 218,106 (11,245 ) 14 206,875 Performance materials-proprietary manufacturing process (15 years) 15.0 39,323 (2,294 ) — 37,029 Electronic chemicals-other (1-15 years) 7.4 2,649 (1,966 ) (84 ) 599 Performance materials-other (5-15 years) 6.2 3,160 (698 ) 15 2,477 Total intangible assets subject to amortization 18.5 $ 277,338 $ (22,338 ) $ (691 ) $ 254,309 Intangible assets not subject to amortization: Performance materials-penta product registrations 8,765 Performance materials-related trade name and trademark 37,436 Performance materials-proprietary manufacturing process 2,808 Total intangible assets not subject to amortization 49,009 Total intangible assets, net $ 303,318 Number July 31, 2017 Weighted Foreign Average Currency Amortization Original Accumulated Translation Carrying Period Cost Amortization Adjustment Amount Intangible assets subject to amortization (range of useful life): Electronic chemicals-value of product qualifications (5-15 years) 14.1 $ 14,100 $ (5,479 ) $ (841 ) $ 7,780 Performance materials-customer relationships (15-20 years) 19.7 227,521 (3,244 ) 54 224,331 Performance materials-proprietary manufacturing process (15 years) 15.0 39,245 (322 ) — 38,923 Electronic chemicals-other (1-15 years) 7.4 2,649 (1,740 ) (114 ) 795 Performance materials-other (5-15 years) 6.2 3,160 (289 ) 54 2,925 Total intangible assets subject to amortization 13.6 $ 286,675 $ (11,074 ) $ (847 ) $ 274,754 Intangible assets not subject to amortization: Performance materials-penta product registrations 8,765 Performance materials-related trade name and trademark 34,074 Performance materials-proprietary manufacturing process 2,808 Total intangible assets not subject to amortization 45,647 Total intangible assets, net $ 320,401 Intangible assets subject to amortization are amortized over their estimated useful lives. Amortization expense was approximately $3.9 million and $0.6 million for the three months ended April 30, 2018 and 2017, respectively, and $11.3 million and $1.7 million for the nine months ended April 30, 2018 and 2017, respectively.

Dividends

Dividends	9 Months Ended
	Apr. 30, 2018
Dividends [Abstract]
Dividends	9. Dividends Dividends of approximately $0.5 million ($0.03 per share) and $0.4 million ($0.03 per share) were declared and paid in the third quarter of fiscal years 2018 and 2017, respectively. Dividends of approximately $1.3 million ($0.09 per share) and $1.1 million ($0.09 per share) were declared and paid in the first nine months of fiscal years 2018 and 2017, respectively. A dividend of $0.03 per share was approved by the Company’s board of directors on June 4, 2018 to be paid on June 22, 2018 to shareholders of record on June 15, 2018.

Segment Information

Segment Information	9 Months Ended
	Apr. 30, 2018
Segment Reporting [Abstract]
Segment Information	10. Segment Information The Company has two reportable segments — electronic chemicals and performance materials. In the fiscal quarter ended April 30, 2017, the Company’s management, including the chief executive officer, who is the chief operating decision maker, determined that the Company’s operations should be reported as the electronic chemicals segment and the performance materials segment. The performance materials segment includes the Company’s pipeline performance business platform and wood treating chemicals business platform. The Flowchem and Sealweld businesses acquired in the second half of fiscal year 2017 are included in the performance materials segment. Three Months Ended Nine Months Ended April 30, April 30, 2018 2017 2018 2017 (Amounts in thousands) (Amounts in thousands) Net sales Electronic chemicals $ 74,669 $ 68,141 $ 222,401 $ 204,829 Performance materials 43,978 13,475 120,761 32,353 Other activities — — — — Total consolidated net sales $ 118,647 $ 81,616 $ 343,162 $ 237,182 Depreciation and amortization Electronic chemicals $ 2,864 $ 2,857 $ 8,418 $ 8,502 Performance materials 4,250 549 12,418 1,121 Other activities 550 411 1,523 1,241 Total consolidated depreciation and amortization $ 7,664 $ 3,817 $ 22,359 $ 10,864 Operating income (1) Electronic chemicals $ 10,889 $ 8,509 $ 34,877 $ 26,153 Performance materials 16,041 4,224 40,435 10,927 Other activities (2,977 ) (3,366 ) (9,549 ) (9,993 ) Total consolidated operating income 23,953 9,367 65,763 27,087 Total other (expense) income, net (3,265 ) (157 ) (19,440 ) (562 ) Income before income taxes $ 20,688 $ 9,210 $ 46,323 $ 26,525 (1) Segment income from operations includes allocated corporate overhead expenses, but excludes restructuring and realignment charges, which are included in other activities.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Apr. 30, 2018
Debt Disclosure [Abstract]
Long-Term Debt	11. Long-Term Debt The Company’s debt as of April 30, 2018 and July 31, 2017 consisted of the following: April 30, July 31, 2018 2017 (Amounts in thousands) Senior secured debt: Term loan, maturing on June 15, 2024, variable interest rates based on LIBOR plus 2.75%, at April 30, 2018 $ 330,000 $ 540,000 Total debt 330,000 540,000 Current maturities of long-term debt — (3,167 ) Unamortized debt issuance costs and original issue discount (6,450 ) (13,731 ) Long-term debt, net of current maturities $ 323,550 $ 523,102 On June 15, 2017, the Company entered into a credit agreement (as amended, the “Credit Agreement”) with KeyBank National Association, as agent, KeyBanc Capital Markets, Inc., HSBC Securities (USA) Inc., and JPMorgan Chase Bank, N.A., as joint lead arrangers and joint bookrunners, the lenders named therein, and ING Capital LLC, as documentation agent. The Credit Agreement provides for a seven year syndicated senior secured term loan of $550.0 million (the “Term Loan”) and a five year senior secured revolving credit facility of $50.0 million (the “Revolving Loan”). On December 19, 2017, the Company entered into an amendment to the Credit Agreement to reduce the interest rate margins applicable to borrowings under the Term Loan and the Revolving Loan. During the nine months ended April 30, 2018, the Company made principal payments totaling $210 million on the Term Loan, including $175.7 million paid using the net proceeds from the public offering of the Company’s common stock that closed on October 23, 2017. In conjunction with the amendment to the Credit Agreement and principal payments on the Term Loan, the Company recorded an accelerated amortization of deferred financing costs and original issue discount of $6.4 million as a loss on extinguishment of debt in the Company’s condensed consolidated statements of income. At April 30, 2018, the Company had $330.0 million outstanding under the Term Loan, with up to $46.8 million of additional borrowing capacity under the Revolving Loan after giving effect to a reduction of $3.2 million for outstanding letters of credit. The Term Loan bears interest at a varying rate of LIBOR plus a margin based on net funded debt to adjusted EBITDA, as calculated in accordance with the Credit Agreement: Term Loan - Ratio of Net Funded Debt to Adjusted EBITDA Margin Greater than 2.5 to 1.0 2.75 % Less than or equal to 2.5 to 1.0 2.50 % The Revolving Loan bears interest at a varying rate of LIBOR plus a margin based on net funded debt to adjusted EBITDA, as calculated in accordance with the Credit Agreement: Revolving Loan - Ratio of Net Funded Debt to Adjusted EBITDA Margin Greater than 4.25 to 1.0 2.75 % Greater than 3.75 to 1.0, but less than or equal to 4.25 to 1.0 2.50 % Less than 3.75 to 1.0 2.25 % As of April 30, 2018, the Term Loan bore interest at 4.651% and the Revolving Loan bore interest at 4.151%. There were no outstanding borrowings under the Revolving Loan as of April 30, 2018. The Company also incurs an unused commitment fee of 0.375% on the unused amount of commitments under the Revolving Loan. Loans under the Credit Agreement are secured by the Company’s assets, including stock in subsidiaries, inventory, accounts receivable, equipment, intangible assets, and real property. The Credit Agreement has restrictive covenants, including a covenant that the Company must maintain a consolidated net leverage ratio between 6.5 to 1.0 through the fiscal quarter ended April 30, 2018, which ratio is reduced each year thereafter by an amount set forth in the Credit Agreement, until the twelve months ended April 30, 2022, following which the Company must maintain a consolidated net leverage ratio below 4.0 to 1.0. As of April 30, 2018, the Company was in compliance with all covenants of the Credit Agreement.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Apr. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	12. Fair Value Measurements Fair Value Hierarchy Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There are three approaches for measuring the fair value of assets and liabilities: the market approach, the income approach and the cost approach, each of which includes multiple valuation techniques. The fair value accounting standards do not prescribe which valuation technique should be used when measuring fair value and do not prioritize among the techniques. These standards establish a fair value hierarchy that prioritizes the inputs used in applying the various valuation techniques. Inputs broadly refer to the assumptions that market participants use to make pricing decisions, including assumptions about risk. Level 1 inputs are given the highest priority in the fair value hierarchy while Level 3 inputs are given the lowest priority. The three levels of the fair value hierarchy are as follows: • Level 1 – Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. • Level 2 – Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date. • Level 3 – Unobservable inputs for which there is little, if any, market activity for the asset or liability being measured. These inputs reflect management’s best estimates of the assumptions market participants would use in determining fair value. The level 3 measurements consist of instruments using standard pricing models and other valuation methods that utilize unobservable pricing inputs that are significant to the overall fair value. Valuation techniques that maximize the use of observable inputs are favored. Assets and liabilities are classified in their entirety based on the lowest priority level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities within the levels of the fair value hierarchy. Significant uses of fair value measurements include: • impairment assessments of long-lived assets; • impairment assessments of goodwill; • recorded value of derivative instruments; and • assets acquired and liabilities assumed in business combinations. Fair Values – Recurring The derivative instrument transactions occurred on August 14, 2017, and as of April 30, 2018 are included within Level 2 other assets, net in the Company’s condensed consolidated balance sheet. Fair Value Measurements at April 30, 2018, Using: Description Level 1 Level 2 Level 3 Total Assets Derivatives – $ — $ 5,238 $ — $ 5,238 Total $ — $ 5,238 $ — $ 5,238 Derivative assets consist of interest rate swaps entered into to mitigate the risk relating to possible adverse changes in interest rates for the Company’s floating rate borrowings. The fair value of the interest rate swaps is estimated as the net present value of projected cash flows based upon forward interest rates at the balance sheet date. The models used to value the interest rate swaps are based primarily on readily observable market data, such as LIBOR forward rates, for all substantial terms of the interest rate swap contracts and the credit risk of the counterparties. As such, these derivative instruments are included in Level 2 inputs. See Note 13, Derivative Financial Instruments . Fair Values – Non-Recurring In addition to the financial assets and liabilities included in the above table, certain nonfinancial assets and liabilities are to be measured at fair value on a nonrecurring basis in accordance with applicable GAAP. In general, nonfinancial assets including goodwill, other intangible assets and property and equipment are measured at fair value when there is an indication of impairment and are recorded at fair value only when an impairment is recognized. As of April 30, 2018, the Company had not recorded any impairment related to such assets and had no other material nonfinancial assets or liabilities requiring adjustments or write-downs to their current fair value. As allowed by applicable FASB guidance, the Company has elected not to apply the fair value option for financial assets and liabilities to any of its currently eligible financial assets or liabilities. As of April 30, 2018 and July 31, 2017, the Company’s material financial assets and liabilities not carried at fair value included cash and cash equivalents, accounts receivable, accounts payable and accrued expenses. These financial instruments are recorded at their carrying values which are deemed to approximate fair value, generally due to their short periods to maturity .

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Apr. 30, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	13. Derivative Financial Instruments The Company held certain derivative instruments that were accounted for pursuant to ASC 815, Derivatives and Hedging The Company entered into certain interest rate swaps with notional amounts totaling $243.0 million, to limit its exposure to variability of the one-month LIBOR floating interest rate on a significant portion of the outstanding balance of its Term Loans. See Note 11, Long-Term Debt . The interest rate swap agreements are in place with two U.S.-based counterparties, with expected termination dates of June 15, 2024. Every derivative instrument is required to be recorded on the balance sheet as either an asset or a liability measured at its fair value. If the derivative does not qualify as a hedge or is not designated as a hedge, changes in fair value of these non-hedge derivatives are recognized in earnings in derivative fair value income or loss. None of the derivative instruments are used for trading purposes. The effects of the derivative instruments on the condensed consolidated financial statements were as follows as of or for each of the period presented below (amounts presented exclude any income tax effects): The combined fair value of derivatives not designated as hedging instruments included in the accompanying condensed consolidated balance sheet as of April 30, 2018 is summarized below (in thousands). Fair Value as of Description Location April 30, 2018 Derivative instruments – interest rate swaps Other assets, net $ 5,238 The effects of derivatives not designated as hedging instruments on the condensed consolidated statements of income for the three and nine months ended April 30, 2018 are summarized below (in thousands). Three Months Ended Nine Months Ended Description Location April 30, 2018 April 30, 2018 Derivative instruments – interest rate swaps Derivative fair value gain $ 1,365 $ 5,238

Income Taxes

Income Taxes	9 Months Ended
	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	14. Income Taxes Income tax expense for the interim periods was computed using an estimated annual effective income tax rate applied to year-to-date income before income tax expense. In determining the estimated annual effective income tax rate, the Company analyzes various factors, including forecasts of projected annual earnings and the ability to use tax credits and net operating loss carry forwards. The overall effective income tax rate for the three and nine months ended April 30, 2018 was 24.4% and (1.1)%, respectively. For the three and nine months April 30, 2017, the overall effective income tax rate was 34.1% and 31.1%, respectively. The decrease in the effective tax rate from the prior fiscal year was due to one-time tax benefits reflecting the impact of the remeasurement of net deferred tax liabilities resulting from the Tax Cuts and Jobs Act of 2017 described below, and stock-based compensation tax benefits realized as a result of the adoption of ASU 2016-09 in the second quarter of fiscal year 2017. On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act of 2017 (the “Tax Act”). The Tax Act significantly revises the future ongoing U.S. corporate income tax by, among other things, lowering the U.S. corporate income tax rate from 35% to 21%, changing how foreign earnings are subject to U.S. tax by implementing a territorial tax system, and eliminating certain deductions, including the domestic manufacturing deduction. The Tax Act also enhances and extends through 2026 the option to claim accelerated depreciation deductions on qualified property. As the Company has a July 31 fiscal year-end, the lower corporate income tax rate will be phased in, resulting in an estimated U.S. statutory federal rate of approximately 27% for our fiscal year ending July 31, 2018, and 21% for subsequent fiscal years. Under GAAP, the Company is required to recognize the effects of changes in tax laws and tax rates on deferred tax assets and liabilities in the period in which the new legislation is enacted. For the fiscal quarter ended April 30, 2018, the Company recorded a net tax benefit of approximately $11.0 million from the new legislation. The tax benefit mainly reflects the impact of the remeasurement of net deferred tax liabilities resulting from the permanent reduction in the U.S. statutory corporate tax rate from 35% to 21%. There are also certain transitional impacts of the Tax Act. As part of the transition to the new territorial tax system, the Tax Act imposes a one-time repatriation tax on deemed repatriation of historical earnings of foreign subsidiaries. However, the Company does not believe the transitional tax is material. The changes included in the Tax Act are broad and complex and the Company does not have all the necessary information to analyze all income tax effects of the Tax Act. The above income tax benefit amount is a provisional amount based on a reasonable estimate of the impact of the reduction in corporate tax rate on our current and deferred tax liabilities. Changes in the estimate of our deferred tax asset and liability activity during fiscal year 2018 could impact our remeasurement of net deferred tax liabilities. In addition, there is uncertainty about the interpretation of the Tax Act and the Internal Revenue Service guidance on the Tax Act. The Company’s estimation of the one-time repatriation tax may differ from the provision amount as a result of the uncertainty from the interpretation of the Tax Act and changes in the estimate of historical earnings of foreign corporations. The Company will continue to evaluate the Tax Act and adjust the provisional amounts as additional information becomes available. The ultimate impact of the Tax Act may differ from the provisional amounts due to changes in the Company’s interpretations and assumptions, as well as additional guidance on the interpretation of the Tax Act. In the fiscal quarter ended April 30, 2018, the Company released a net valuation allowance of $0.2 million related to the Company’s business in Singapore on the basis of management’s assessment of its deferred tax assets that are more likely than not to be realized. The achievement of three years of cumulative pre-tax income in Singapore was the primary positive evidence leading to the decision to release the valuation allowance.

Litigation and Other Contingenc

Litigation and Other Contingencies	9 Months Ended
	Apr. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Litigation and Other Contingencies	15. Litigation and Other Contingencies The Company is subject to contingencies, including litigation relating to environmental laws and regulations, commercial disputes and other matters. Certain of these contingencies are discussed below. The ultimate resolution of these contingencies is subject to significant uncertainty, and should the Company fail to prevail in any of them or should several of them be resolved against the Company in the same reporting period, these matters could, individually or in the aggregate, be material to the condensed consolidated financial statements. The ultimate outcome of these matters, however, cannot be determined at this time, nor can the amount of any potential loss or range of loss be reasonably estimated, and as a result except where indicated no amounts have been recorded in the Company’s condensed consolidated financial statements. The Company records legal costs associated with loss contingencies as expenses in the period in which they are incurred. The EPA has listed the Star Lake Canal Superfund Site near Beaumont, Texas on the National Priorities List. The Company’s subsidiary, KMG-Bernuth, was notified in October 2014 that the EPA considered it to have potential liability under the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended, also known as “CERCLA,” in connection with this site by virtue of its relationship with certain alleged predecessor companies, including Idacon, Inc. (f/k/a Sonford Chemical Company). The EPA has estimated that the remediation will cost approximately $22.0 million. The Company and approximately seven other parties entered into an agreement with the EPA in September 2016 to complete a remedial design phase of the remediation of the site. The remediation work will be performed under a separate future agreement. Although the Company has not conceded liability, the Company established a liability of $1.3 million in the third quarter of fiscal year 2015 in connection with this matter. As of April 30, 2018, the liability remaining was $1.0 million. The Company is subject to federal, state, local and foreign laws and regulations and potential liabilities relating to the protection of the environment and human health and safety including, among other things, the cleanup of contaminated sites, the treatment, storage and disposal of wastes, the emission of substances into the air or waterways, and various health and safety matters. The Company expects to incur substantial costs for ongoing compliance with such laws and regulations. The Company may also face governmental or third-party claims, or otherwise incur costs, relating to cleanup of, or for injuries resulting from, contamination at sites associated with past and present operations. The Company accrues for environmental liabilities when a determination can be made that they are probable and reasonably estimable.

Restructuring and Realignment E

Restructuring and Realignment Events	9 Months Ended
	Apr. 30, 2018
Restructuring And Related Activities [Abstract]
Restructuring and Realignment Events	16. Restructuring and Realignment Events In April 2017, the Company began implementation of a plan of restructuring of its electronic chemicals segment in Asia. As a result, the Company incurred approximately $0.1 million of employee related severance costs during the nine months ended April 30, 2018. As part of the Company’s global restructuring of its electronic chemicals operations, the Company closed one of its facilities in Milan, Italy in December 2015, and shifted some production to facilities in France and the United Kingdom. Accelerated depreciation with respect to the closed facilities has been completed. At April 30, 2018, the accrued liability associated with restructuring and other related charges consisted of the following (in thousands): Decommissioning and Total Accrued liability at August 1, 2017 $ 77 $ 77 Payments (36 ) (36 ) Adjustments (41 ) (41 ) Accrued liability at April 30, 2018 $ — $ —

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Apr. 30, 2018
Summary of Measurement Period Adjustments Made to Preliminary Purchase Price Allocation	The Company further recorded measurement period adjustments in the third quarter of fiscal year 2018 to the acquired deferred tax assets and liabilities as a result of further analyses performed over Flowchem’s tax attributes as of the date of the business combination, which reduced the recognized goodwill. Measurement April 30, 2018 Period Adjustment July 31, 2017 Customer relationships $ 205,467 $ (9,415 ) $ 214,882 Trade names and trademarks 32,353 3,402 28,951 Proprietary manufacturing process 39,323 78 39,245 Deferred tax liability 22,238 (2,808 ) 25,046 Goodwill 202,471 3,125 199,346
Flowchem Holdings LLC
Summary of Acquired Assets and Assumed Liabilities and Preliminary/Final Acquisition Accounting for Fair Value of Assets and Liabilities Recognized	The Company has accounted for the purchase using the acquisition method of accounting for business combinations. Accordingly, the purchase price has been allocated to the underlying assets and liabilities in proportion to their respective fair values Cash $ 11,445 Accounts receivable 11,280 Inventory 9,310 Other assets 499 Property, plant and equipment, net 19,665 Intangible assets Customer relationships 205,467 Trade names and trademark 32,353 Proprietary manufacturing process 39,323 Total assets $ 329,342 Current liabilities 3,132 Deferred tax liability 22,238 Net identifiable assets acquired 303,972 Goodwill 202,471 Fair value of net assets acquired $ 506,443
Sealweld Corporation
Summary of Acquired Assets and Assumed Liabilities and Preliminary/Final Acquisition Accounting for Fair Value of Assets and Liabilities Recognized	The following table summarizes the acquired assets and assumed liabilities and the final acquisition accounting for the fair value of the assets and liabilities recognized in the condensed consolidated balance sheet at April 30, 2018 (in thousands): Cash $ 69 Accounts receivable 2,937 Inventory 2,350 Other assets 38 Property, plant and equipment, net 4,192 Intangible assets — Trade name/trademark 2,185 Non-compete agreements 2,254 Customer relationships 2,348 Total assets acquired $ 16,373 Current liabilities 1,272 Deferred taxes 681 Net identifiable assets acquired 14,420 Goodwill 2,771 Fair value of net assets acquired $ 17,191

Inventories, Net (Tables)

Inventories, Net (Tables)	9 Months Ended
	Apr. 30, 2018
Inventory Disclosure [Abstract]
Summary of Inventories, Net	Inventories, net are summarized in the following table (in thousands): April 30, July 31, 2018 2017 Raw materials $ 12,802 $ 9,124 Work in process 3,531 3,763 Supplies 922 884 Finished products 37,478 33,341 Less: reserve for inventory obsolescence (646 ) (630 ) Inventories, net $ 54,087 $ 46,482

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Apr. 30, 2018
Property Plant And Equipment [Abstract]
Property, Plant, and Equipment and Related Accumulated Depreciation and Amortization	Property, plant and equipment and related accumulated depreciation and amortization are summarized as follows (in thousands): April 30, July 31, 2018 2017 Land $ 16,792 $ 12,632 Buildings and improvements 53,699 50,973 Equipment 116,672 106,379 Leasehold improvements 2,777 2,755 189,940 172,739 Less: accumulated depreciation and amortization (88,827 ) (76,974 ) 101,113 95,765 Construction-in-progress 13,527 9,670 Property, plant and equipment, net (1) $ 114,640 $ 105,435 (1) In fiscal year 2016, the Company classified one of its Milan production facilities as assets held for sale, and reclassified $4.3 million into other current assets. In April 2018, the Company reclassified these assets to held and used, and accordingly recognized depreciation expense of $0.1 million. The Company plans to use the facility for storage.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Apr. 30, 2018
Restricted Stock Unit ("RSU")
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Performance Based RSU Awards Granted	Target Expected Shares Series Award Grant Date Measurement Percentage Expected Date of Grant Award Shares Fair Value Period Vesting (1) to Vest Fiscal Year 2018 Awards 12/5/2017 Series 4, Tranche 1 27,541 $ 54.09 7/31/2020 Forfeitures (2) (2,291 ) Total 25,250 100 % 25,250 12/5/2017 Series 4, Tranche 2 27,542 $ 54.09 7/31/2020 Forfeitures (2) (2,291 ) Total 25,251 172 % 43,431 12/5/2017 Series 3 14,000 $ 54.09 7/31/2018 100 % 14,000 2/5/2018 Series 1 7,287 $ 60.22 7/31/2020 4/5/2018 Series 1 100 $ 60.93 7/31/2020 Forfeitures (2) (50 ) Total 7,337 172 % 12,619 Fiscal Year 2017 Awards 12/8/2016 Series 1 10,531 Forfeitures (2) (838 ) Total 9,693 $ 34.95 7/31/2019 184 % 17,871 4/28/2017 Series 4, Tranche 1 4,545 $ 52.55 7/31/2019 10/21/2016 Series 4, Tranche 1 44,337 $ 29.11 7/31/2019 Forfeitures (2) (8,442 ) Total 40,440 100 % 40,440 4/28/2017 Series 4, Tranche 2 4,546 $ 52.55 7/31/2019 10/21/2016 Series 4, Tranche 2 44,337 $ 29.11 7/31/2019 Forfeitures (2) (8,442 ) Total 40,441 184 % 74,561 Fiscal Year 2016 Awards 3/10/2016 Series 1 14,625 $ 21.89 10/31/2018 1/29/2016 Series 1 57,163 $ 21.80 10/31/2018 Forfeitures (2) (13,733 ) Total 58,055 196 % 114,030 1/19/2016 Series 3 82,938 $ 20.89 7/31/2020 151 % 125,236 (1) The percentage vesting for performance-based RSU awards is currently estimated at 172%, 184% and 196% of the target award for Series 1 awards granted in fiscal years 2018, 2017 and 2016, respectively, 100% and 151% of the target award for Series 3 awards granted in fiscal years 2018 and 2016, respectively, 100% and 172% of the target award for the first and second tranches, respectively, of the Series 4 awards granted in fiscal year 2018, and 100% and 184% of the target award for the first and second tranches, respectively, of the Series 4 awards granted in fiscal year 2017. (2) Forfeitures include Series 1 and Series 4 awards that were granted to certain employees in fiscal years 2018, 2017 and 2016 but that were forfeited at the termination of their employment.
Time Based Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Activity for Time-Based Stock Awards	A summary of activity for time-based stock awards for the nine months ended April 30, 2018 is presented below: Shares Weighted-Average Grant-Date Fair Value Non-vested on August 1, 2017 173,603 $ 24.37 Granted (1) 30,640 59.90 Vested (2) (17,807 ) 40.36 Forfeited (1,371 ) 27.73 Non-vested on April 30, 2018 185,065 28.69 (1) Includes 6,235 shares granted to non-employee directors for service during the nine months ended April 30, 2018. Includes 24,405 time-based RSU awards granted to certain employees and executives. (2) Includes 6,235 shares granted to non-employee directors for service for the nine months ended April 30, 2018. The shares vest on the date of grant, and the Company recognizes compensation expense on such date. Includes 11,572 time-based RSU awards granted to certain employees and executives, and the Company recognizes compensation expense related to the awards over the respective service periods in accordance with GAAP. Upon vesting, each RSU was converted to one share of common stock.

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Apr. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible assets are summarized as follows (in thousands): Number April 30, 2018 Weighted Foreign Average Currency Amortization Original Accumulated Translation Carrying Period Cost Amortization Adjustment Amount Intangible assets subject to amortization (range of useful life): Electronic chemicals-value of product qualifications (5-15 years) 14.1 $ 14,100 $ (6,135 ) $ (636 ) $ 7,329 Performance materials-customer relationships (15-20 years) 19.7 218,106 (11,245 ) 14 206,875 Performance materials-proprietary manufacturing process (15 years) 15.0 39,323 (2,294 ) — 37,029 Electronic chemicals-other (1-15 years) 7.4 2,649 (1,966 ) (84 ) 599 Performance materials-other (5-15 years) 6.2 3,160 (698 ) 15 2,477 Total intangible assets subject to amortization 18.5 $ 277,338 $ (22,338 ) $ (691 ) $ 254,309 Intangible assets not subject to amortization: Performance materials-penta product registrations 8,765 Performance materials-related trade name and trademark 37,436 Performance materials-proprietary manufacturing process 2,808 Total intangible assets not subject to amortization 49,009 Total intangible assets, net $ 303,318 Number July 31, 2017 Weighted Foreign Average Currency Amortization Original Accumulated Translation Carrying Period Cost Amortization Adjustment Amount Intangible assets subject to amortization (range of useful life): Electronic chemicals-value of product qualifications (5-15 years) 14.1 $ 14,100 $ (5,479 ) $ (841 ) $ 7,780 Performance materials-customer relationships (15-20 years) 19.7 227,521 (3,244 ) 54 224,331 Performance materials-proprietary manufacturing process (15 years) 15.0 39,245 (322 ) — 38,923 Electronic chemicals-other (1-15 years) 7.4 2,649 (1,740 ) (114 ) 795 Performance materials-other (5-15 years) 6.2 3,160 (289 ) 54 2,925 Total intangible assets subject to amortization 13.6 $ 286,675 $ (11,074 ) $ (847 ) $ 274,754 Intangible assets not subject to amortization: Performance materials-penta product registrations 8,765 Performance materials-related trade name and trademark 34,074 Performance materials-proprietary manufacturing process 2,808 Total intangible assets not subject to amortization 45,647 Total intangible assets, net $ 320,401

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Apr. 30, 2018
Segment Reporting [Abstract]
Segment Information	The Company has two reportable segments — electronic chemicals and performance materials. In the fiscal quarter ended April 30, 2017, the Company’s management, including the chief executive officer, who is the chief operating decision maker, determined that the Company’s operations should be reported as the electronic chemicals segment and the performance materials segment. The performance materials segment includes the Company’s pipeline performance business platform and wood treating chemicals business platform. The Flowchem and Sealweld businesses acquired in the second half of fiscal year 2017 are included in the performance materials segment. Three Months Ended Nine Months Ended April 30, April 30, 2018 2017 2018 2017 (Amounts in thousands) (Amounts in thousands) Net sales Electronic chemicals $ 74,669 $ 68,141 $ 222,401 $ 204,829 Performance materials 43,978 13,475 120,761 32,353 Other activities — — — — Total consolidated net sales $ 118,647 $ 81,616 $ 343,162 $ 237,182 Depreciation and amortization Electronic chemicals $ 2,864 $ 2,857 $ 8,418 $ 8,502 Performance materials 4,250 549 12,418 1,121 Other activities 550 411 1,523 1,241 Total consolidated depreciation and amortization $ 7,664 $ 3,817 $ 22,359 $ 10,864 Operating income (1) Electronic chemicals $ 10,889 $ 8,509 $ 34,877 $ 26,153 Performance materials 16,041 4,224 40,435 10,927 Other activities (2,977 ) (3,366 ) (9,549 ) (9,993 ) Total consolidated operating income 23,953 9,367 65,763 27,087 Total other (expense) income, net (3,265 ) (157 ) (19,440 ) (562 ) Income before income taxes $ 20,688 $ 9,210 $ 46,323 $ 26,525 (1) Segment income from operations includes allocated corporate overhead expenses, but excludes restructuring and realignment charges, which are included in other activities.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Apr. 30, 2018
Debt Disclosure [Abstract]
Schedule of Debt	The Company’s debt as of April 30, 2018 and July 31, 2017 consisted of the following: April 30, July 31, 2018 2017 (Amounts in thousands) Senior secured debt: Term loan, maturing on June 15, 2024, variable interest rates based on LIBOR plus 2.75%, at April 30, 2018 $ 330,000 $ 540,000 Total debt 330,000 540,000 Current maturities of long-term debt — (3,167 ) Unamortized debt issuance costs and original issue discount (6,450 ) (13,731 ) Long-term debt, net of current maturities $ 323,550 $ 523,102
Ratio of Net Funded Debt to Adjusted EBITDA	The Term Loan bears interest at a varying rate of LIBOR plus a margin based on net funded debt to adjusted EBITDA, as calculated in accordance with the Credit Agreement: Term Loan - Ratio of Net Funded Debt to Adjusted EBITDA Margin Greater than 2.5 to 1.0 2.75 % Less than or equal to 2.5 to 1.0 2.50 % The Revolving Loan bears interest at a varying rate of LIBOR plus a margin based on net funded debt to adjusted EBITDA, as calculated in accordance with the Credit Agreement: Revolving Loan - Ratio of Net Funded Debt to Adjusted EBITDA Margin Greater than 4.25 to 1.0 2.75 % Greater than 3.75 to 1.0, but less than or equal to 4.25 to 1.0 2.50 % Less than 3.75 to 1.0 2.25 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Apr. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis	The following tables present the fair value hierarchy table for assets and liabilities measured at fair value, on a recurring basis (in thousands): Fair Value Measurements at April 30, 2018, Using: Description Level 1 Level 2 Level 3 Total Assets Derivatives – $ — $ 5,238 $ — $ 5,238 Total $ — $ 5,238 $ — $ 5,238

Derivative Financial Instrume31

Derivative Financial Instruments (Tables)	9 Months Ended
	Apr. 30, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary of Combined Fair Value of Derivatives not Designated as Hedging Instruments included in Accompanying Condensed Consolidated Balance Sheet	The combined fair value of derivatives not designated as hedging instruments included in the accompanying condensed consolidated balance sheet as of April 30, 2018 is summarized below (in thousands). Fair Value as of Description Location April 30, 2018 Derivative instruments – interest rate swaps Other assets, net $ 5,238
Summary of Effects of Derivatives not Designated as Hedging Instruments on Condensed Consolidated Statements of Income	The effects of derivatives not designated as hedging instruments on the condensed consolidated statements of income for the three and nine months ended April 30, 2018 are summarized below (in thousands). Three Months Ended Nine Months Ended Description Location April 30, 2018 April 30, 2018 Derivative instruments – interest rate swaps Derivative fair value gain $ 1,365 $ 5,238

Restructuring and Realignment32

Restructuring and Realignment Events (Tables)	9 Months Ended
	Apr. 30, 2018
Restructuring And Related Activities [Abstract]
Accrued Liability Associated with Restructuring and Other Related Charges	At April 30, 2018, the accrued liability associated with restructuring and other related charges consisted of the following (in thousands): Decommissioning and Total Accrued liability at August 1, 2017 $ 77 $ 77 Payments (36 ) (36 ) Adjustments (41 ) (41 ) Accrued liability at April 30, 2018 $ — $ —

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) $ in Millions	Jun. 15, 2017USD ($)	Feb. 02, 2017USD ($)$ / $	Feb. 02, 2017CAD ($)	Apr. 30, 2018USD ($)	Jul. 31, 2017USD ($)	Feb. 02, 2017CAD ($)$ / $
Business Acquisition [Line Items]
Goodwill				$ 227,797,000	$ 224,391,000
Flowchem Holdings LLC
Business Acquisition [Line Items]
Acquisition date				Jun. 15, 2017
Cash consideration	$ 495,000,000
Cash acquired	$ 11,400,000
Line of credit facility, maximum borrowing capacity				$ 550,000,000
Line of credit facility, term				7 years
Acquisition-related costs incurred				$ 500,000
Fair value of accounts receivable acquired				11,280,000
Goodwill				202,471,000	$ 199,346,000
Acquisition, measurement period adjustment				3,132,000
Flowchem Holdings LLC | Measurement Period Adjustment
Business Acquisition [Line Items]
Goodwill				3,125,000
Flowchem Holdings LLC | Performance Materials
Business Acquisition [Line Items]
Goodwill				202,500,000
Goodwill expected to be tax deductible				$ 155,900,000
Sealweld Corporation
Business Acquisition [Line Items]
Acquisition date				Feb. 1, 2017
Cash consideration		$ 17,200,000	$ 22.3
Acquisition-related costs incurred				$ 100,000
Fair value of accounts receivable acquired				2,937,000
Goodwill		$ 2,700,000		2,771,000
Exchange rate | $ / $		0.77				0.77
Estimated working capital		$ 4,200,000				$ 5.5
Acquisition, measurement period adjustment				1,272,000
Sealweld Corporation | Measurement Period Adjustment
Business Acquisition [Line Items]
Goodwill				2,800,000
Acquisition, measurement period adjustment				100,000
Sealweld Corporation | Revolving Loan Facility
Business Acquisition [Line Items]
Line of credit facility, outstanding		$ 17,000,000
Sealweld Corporation | Performance Materials
Business Acquisition [Line Items]
Goodwill expected to be tax deductible				$ 100,000

Summary of Acquired Assets and

Summary of Acquired Assets and Assumed Liabilities and Preliminary/Final Acquisition Accounting for Fair Value of Assets and Liabilities Recognized (Detail) - USD ($) $ in Thousands	Apr. 30, 2018	Jul. 31, 2017	Feb. 02, 2017
Intangible assets
Goodwill	$ 227,797	$ 224,391
Flowchem Holdings LLC
Business Acquisition [Line Items]
Cash	11,445
Accounts receivable	11,280
Inventory	9,310
Other assets	499
Property, plant and equipment, net	19,665
Intangible assets
Total assets acquired	329,342
Current liabilities	3,132
Deferred tax liability	22,238	25,046
Net identifiable assets acquired	303,972
Goodwill	202,471	199,346
Fair value of net assets acquired	506,443
Flowchem Holdings LLC | Customer relationships
Intangible assets
Intangible assets	205,467	214,882
Flowchem Holdings LLC | Trade names and trademark
Intangible assets
Intangible assets	32,353	28,951
Flowchem Holdings LLC | Proprietary manufacturing process
Intangible assets
Intangible assets	39,323	$ 39,245
Sealweld Corporation
Business Acquisition [Line Items]
Cash	69
Accounts receivable	2,937
Inventory	2,350
Other assets	38
Property, plant and equipment, net	4,192
Intangible assets
Total assets acquired	16,373
Current liabilities	1,272
Deferred tax liability	681
Net identifiable assets acquired	14,420
Goodwill	2,771		$ 2,700
Fair value of net assets acquired	17,191
Sealweld Corporation | Customer relationships
Intangible assets
Intangible assets	2,348
Sealweld Corporation | Trade names and trademark
Intangible assets
Intangible assets	2,185
Sealweld Corporation | Non-compete agreements
Intangible assets
Intangible assets	$ 2,254

Summary of Measurement Period A

Summary of Measurement Period Adjustments Made to Preliminary Purchase Price Allocation (Detail) - USD ($) $ in Thousands	Apr. 30, 2018	Jul. 31, 2017
Business Acquisition [Line Items]
Goodwill	$ 227,797	$ 224,391
Flowchem Holdings LLC
Business Acquisition [Line Items]
Deferred tax liability	22,238	25,046
Goodwill	202,471	199,346
Flowchem Holdings LLC | Measurement Period Adjustment
Business Acquisition [Line Items]
Deferred tax liability	(2,808)
Goodwill	3,125
Flowchem Holdings LLC | Customer relationships
Business Acquisition [Line Items]
Intangible assets	205,467	214,882
Flowchem Holdings LLC | Customer relationships | Measurement Period Adjustment
Business Acquisition [Line Items]
Intangible assets	(9,415)
Flowchem Holdings LLC | Trade names and trademark
Business Acquisition [Line Items]
Intangible assets	32,353	28,951
Flowchem Holdings LLC | Trade names and trademark | Measurement Period Adjustment
Business Acquisition [Line Items]
Intangible assets	3,402
Flowchem Holdings LLC | Proprietary manufacturing process
Business Acquisition [Line Items]
Intangible assets	39,323	$ 39,245
Flowchem Holdings LLC | Proprietary manufacturing process | Measurement Period Adjustment
Business Acquisition [Line Items]
Intangible assets	$ 78

Earnings per Share - Additional

Earnings per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Oct. 23, 2017	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Number of dilutive shares related to stock-based awards		399,701	415,661	374,903	352,755
Number of shares potentially dilutive securities not included in the computation of diluted earnings per share		3,600	415	4,920	3,858
Net proceeds from public offering of common stock				$ 175,669
Underwritten Public Offering
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Number of shares issued pursuant to underwriters’ exercise	450,000
Public offering price per share	$ 54
Net proceeds from public offering of common stock	$ 175,700
Underwritten Public Offering | Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares of common stock issued	3,450,000

Summary of Inventories, Net (De

Summary of Inventories, Net (Detail) - USD ($) $ in Thousands	Apr. 30, 2018	Jul. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 12,802	$ 9,124
Work in process	3,531	3,763
Supplies	922	884
Finished products	37,478	33,341
Less: reserve for inventory obsolescence	(646)	(630)
Inventories, net	$ 54,087	$ 46,482

Property, Plant, and Equipment

Property, Plant, and Equipment and Related Accumulated Depreciation and Amortization (Detail) - USD ($) $ in Thousands		Apr. 30, 2018	Jul. 31, 2017
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross		$ 189,940	$ 172,739
Less: accumulated depreciation and amortization		(88,827)	(76,974)
Property plant and equipment excluding construction in progress		101,113	95,765
Construction-in-progress		13,527	9,670
Property, plant and equipment, net	[1]	114,640	105,435
Land
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross		16,792	12,632
Buildings and improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross		53,699	50,973
Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross		116,672	106,379
Leasehold improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross		$ 2,777	$ 2,755
[1]	In fiscal year 2016, the Company classified one of its Milan production facilities as assets held for sale, and reclassified $4.3 million into other current assets. In April 2018, the Company reclassified these assets to held and used, and accordingly recognized depreciation expense of $0.1 million. The Company plans to use the facility for storage.

Property, Plant, and Equipmen39

Property, Plant, and Equipment and Related Accumulated Depreciation and Amortization (Parenthetical) (Detail) $ in Millions	1 Months Ended
	Apr. 30, 2018USD ($)	Jul. 31, 2016USD ($)Facility
Property Plant And Equipment [Abstract]
Reclassification of assets held for sale into other current assets		$ 4.3
Number of production facilities | Facility		1
Depreciation expense	$ 0.1

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands		Apr. 05, 2018$ / sharesshares	Feb. 05, 2018$ / sharesshares	Dec. 05, 2017Tranche$ / sharesshares	Apr. 28, 2017$ / sharesshares	Dec. 08, 2016shares	Oct. 21, 2016$ / sharesshares	Mar. 10, 2016$ / sharesshares	Jan. 29, 2016$ / sharesshares	Jan. 19, 2016$ / sharesshares	Apr. 30, 2018USD ($)$ / sharesshares	Apr. 30, 2017USD ($)	Apr. 30, 2018USD ($)$ / sharesshares	Apr. 30, 2017USD ($)$ / shares	Jul. 31, 2017Tranche$ / sharesshares	Jul. 31, 2016shares	Aug. 01, 2017$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $											$ 2,100	$ 1,200	$ 5,687	$ 4,280
Share based compensation, related tax benefits | $											600	$ 400	1,500	$ 1,500
Unrecognized compensation costs related to outstanding stock awards | $											$ 9,600		$ 9,600
Weighted average period for recognition of compensation cost													1 year 8 months 12 days
Series Award One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected percentage of vesting													172.00%		184.00%	196.00%
Series Award Three
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected percentage of vesting													100.00%			151.00%
Series Award Four | Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected percentage of vesting				100.00%											100.00%
Series Award Four | Second Tranche
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected percentage of vesting				172.00%											184.00%
Performance-based Restricted Stock Unit ("RSU") Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target number of shares outstanding, non vested											467,438		467,438				373,698
Awards vested													0
Stock issued during period shares for each unit converted													1
Expected percentage of vesting				100.00%						151.00%
Weighted average per share grant date fair value | $ / shares											$ 31.27		$ 31.27				$ 25.49
Grant Date Fair Value | $ / shares													$ 54.68	$ 31.55
Awards granted, shares													76,470
Performance-based Restricted Stock Unit ("RSU") Awards | Christopher T. Fraser | Cumulative Revenue and Stockholder Return
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target Award Shares										82,938
Performance-based Restricted Stock Unit ("RSU") Awards | Series Award One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum award, as a percentage of target award													200.00%		200.00%	200.00%
Target Award Shares		100	7,287			10,531		14,625	57,163				7,337		9,693	58,055
Expected percentage of vesting	[1]												172.00%		184.00%	196.00%
Grant Date Fair Value | $ / shares		$ 60.93	$ 60.22					$ 21.89	$ 21.80						$ 34.95
Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Three
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum award, as a percentage of target award										200.00%
Target Award Shares				14,000						82,938
Expected percentage of vesting	[1]			100.00%						151.00%
Grant Date Fair Value | $ / shares				$ 54.09						$ 20.89
Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Three | Christopher T. Fraser
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target Award Shares				4,000
Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Three | Christopher T. Fraser | Debt Payments
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target Award Shares				10,000
Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Four
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target Award Shares															40,440
Number of tranches | Tranche				2											2
Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Four | Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target Award Shares				27,541	4,545		44,337						25,250
Expected percentage of vesting	[1]												100.00%		100.00%
Target award percentage															50.00%
Grant Date Fair Value | $ / shares				$ 54.09	$ 52.55		$ 29.11
Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Four | Second Tranche
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum award, as a percentage of target award				200.00%											200.00%
Target Award Shares				27,542	4,546		44,337						25,251		40,441
Expected percentage of vesting	[1]												172.00%		184.00%
Target award percentage				50.00%
Grant Date Fair Value | $ / shares				$ 54.09	$ 52.55		$ 29.11
Performance Based Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average per share grant date fair value of performance share awards forfeited | $ / shares													$ 37.49	$ 22.97
Time Based Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target number of shares outstanding, non vested											185,065		185,065		173,603
Awards vested	[2]												17,807
Target Award Shares	[3]												30,640
Weighted average per share grant date fair value | $ / shares											$ 28.69		$ 28.69		$ 24.37
Grant Date Fair Value | $ / shares	[3]												59.90
Weighted average per share grant date fair value of performance share awards forfeited | $ / shares													$ 27.73
Total fair value of shares vested | $													$ 700	$ 600
[1]	The percentage vesting for performance-based RSU awards is currently estimated at 172%, 184% and 196% of the target award for Series 1 awards granted in fiscal years 2018, 2017 and 2016, respectively, 100% and 151% of the target award for Series 3 awards granted in fiscal years 2018 and 2016, respectively, 100% and 172% of the target award for the first and second tranches, respectively, of the Series 4 awards granted in fiscal year 2018, and 100% and 184% of the target award for the first and second tranches, respectively, of the Series 4 awards granted in fiscal year 2017.
[2]	Includes 6,235 shares granted to non-employee directors for service for the nine months ended April 30, 2018. The shares vest on the date of grant, and the Company recognizes compensation expense on such date. Includes 11,572 time-based RSU awards granted to certain employees and executives, and the Company recognizes compensation expense related to the awards over the respective service periods in accordance with GAAP. Upon vesting, each RSU was converted to one share of common stock.
[3]	Includes 6,235 shares granted to non-employee directors for service during the nine months ended April 30, 2018. Includes 24,405 time-based RSU awards granted to certain employees and executives.

Summary of Performance Based RS

Summary of Performance Based RSU Awards (Detail) - $ / shares

Apr. 05, 2018

Feb. 05, 2018

Dec. 05, 2017

Apr. 28, 2017

Dec. 08, 2016

Oct. 21, 2016

Mar. 10, 2016

Jan. 29, 2016

Jan. 19, 2016

Apr. 30, 2018

Apr. 30, 2017

Jul. 31, 2017

Jul. 31, 2016

Series Award Four | Tranche One

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Expected Percentage of Vesting

100.00%

100.00%

Series Award Four | Second Tranche

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Expected Percentage of Vesting

172.00%

184.00%

Series Award One

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Expected Percentage of Vesting

172.00%

184.00%

196.00%

Series Award Three

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Expected Percentage of Vesting

100.00%

151.00%

Performance-based Restricted Stock Unit ("RSU") Awards

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Target Award Shares, forfeited

[1]

(50)

(838)

(8,442)

(13,733)

Grant Date Fair Value

$ 54.68

$ 31.55

Expected Percentage of Vesting

100.00%

151.00%

Shares Expected to Vest

114,030

Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Four

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Target Award Shares

40,440

Target Award Shares, forfeited

[1]

(2,291)

Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Four | Tranche One

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Grant Dates

Dec. 5, 2017

Apr. 28, 2017

Oct. 21, 2016

Target Award Shares

27,541

4,545

44,337

25,250

Grant Date Fair Value

$ 54.09

$ 52.55

$ 29.11

Measurement Period Ending

Jul. 31, 2020

Jul. 31, 2019

Jul. 31, 2019

Expected Percentage of Vesting

[2]

100.00%

100.00%

Shares Expected to Vest

25,250

40,440

Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Four | Second Tranche

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Grant Dates

Dec. 5, 2017

Apr. 28, 2017

Oct. 21, 2016

Target Award Shares

27,542

4,546

44,337

25,251

40,441

Grant Date Fair Value

$ 54.09

$ 52.55

$ 29.11

Measurement Period Ending

Jul. 31, 2020

Jul. 31, 2019

Jul. 31, 2019

Expected Percentage of Vesting

[2]

172.00%

184.00%

Shares Expected to Vest

43,431

74,561

Performance-based Restricted Stock Unit ("RSU") Awards | Series Award One

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Grant Dates

Apr. 5, 2018

Feb. 5, 2018

Dec. 8, 2016

Mar. 10, 2016

Jan. 29, 2016

Target Award Shares

100

7,287

10,531

14,625

57,163

7,337

9,693

58,055

Grant Date Fair Value

$ 60.93

$ 60.22

$ 21.89

$ 21.80

$ 34.95

Measurement Period Ending

Jul. 31, 2020

Jul. 31, 2020

Oct. 31, 2018

Oct. 31, 2018

Jul. 31, 2019

Expected Percentage of Vesting

[2]

172.00%

184.00%

196.00%

Shares Expected to Vest

12,619

17,871

Performance-based Restricted Stock Unit ("RSU") Awards | Series Award Three

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Grant Dates

Dec. 5, 2017

Jan. 19, 2016

Target Award Shares

14,000

82,938

Grant Date Fair Value

$ 54.09

$ 20.89

Measurement Period Ending

Jul. 31, 2018

Jul. 31, 2020

Expected Percentage of Vesting

[2]

100.00%

151.00%

Shares Expected to Vest

14,000

125,236

[1]

Forfeitures include Series 1 and Series 4 awards that were granted to certain employees in fiscal years 2018, 2017 and 2016 but that were forfeited at the termination of their employment

[2]

The percentage vesting for performance-based RSU awards is currently estimated at 172%, 184% and 196% of the target award for Series 1 awards granted in fiscal years 2018, 2017 and 2016, respectively, 100% and 151% of the target award for Series 3 awards granted in fiscal years 2018 and 2016, respectively, 100% and 172% of the target award for the first and second tranches, respectively, of the Series 4 awards granted in fiscal year 2018, and 100% and 184% of the target award for the first and second tranches, respectively, of the Series 4 awards granted in fiscal year 2017.

Summary of Performance Based 42

Summary of Performance Based RSU Awards (Parenthetical) (Detail)	Dec. 05, 2017	Apr. 30, 2018	Jul. 31, 2017	Jul. 31, 2016
Series Award One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected Percentage of Vesting		172.00%	184.00%	196.00%
Series Award Three
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected Percentage of Vesting		100.00%		151.00%
Series Award Four | Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected Percentage of Vesting	100.00%		100.00%
Series Award Four | Second Tranche
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected Percentage of Vesting	172.00%		184.00%

Summary of Activity for Time-Ba

Summary of Activity for Time-Based Stock Awards (Detail) - Time Based Stock Awards	9 Months Ended
	Apr. 30, 2018$ / sharesshares
Non-vested Shares
Beginning balance, Non-vested | shares	173,603
Granted | shares	30,640	[1]
Vested | shares	(17,807)	[2]
Forfeited | shares	(1,371)
Ending balance, Non-vested | shares	185,065
Weighted-Average Grant-Date Fair Value
Beginning balance, Non-vested | $ / shares	$ 24.37
Granted | $ / shares	59.90	[1]
Vested | $ / shares	40.36	[2]
Forfeited | $ / shares	27.73
Ending balance, Non-vested | $ / shares	$ 28.69
[1]	Includes 6,235 shares granted to non-employee directors for service during the nine months ended April 30, 2018. Includes 24,405 time-based RSU awards granted to certain employees and executives.
[2]	Includes 6,235 shares granted to non-employee directors for service for the nine months ended April 30, 2018. The shares vest on the date of grant, and the Company recognizes compensation expense on such date. Includes 11,572 time-based RSU awards granted to certain employees and executives, and the Company recognizes compensation expense related to the awards over the respective service periods in accordance with GAAP. Upon vesting, each RSU was converted to one share of common stock.

Summary of Activity for Time-44

Summary of Activity for Time-Based Stock Awards (Parenthetical) (Detail)	9 Months Ended
	Apr. 30, 2018shares
Time Based Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Time based stock awards granted	30,640	[1]
Time based stock awards Vested	17,807	[2]
Time Based Stock Awards | Non-Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Time based stock awards granted	6,235
Time based stock awards Vested	6,235
Time Based Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock converting in to common stock, description	Upon vesting, each RSU was converted to one share of common stock.
Stock issued during period shares for each unit converted	1
Time Based Restricted Stock Awards | Employees and Executives
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Time based stock awards granted	24,405
Time based stock awards Vested	11,572
[1]	Includes 6,235 shares granted to non-employee directors for service during the nine months ended April 30, 2018. Includes 24,405 time-based RSU awards granted to certain employees and executives.
[2]	Includes 6,235 shares granted to non-employee directors for service for the nine months ended April 30, 2018. The shares vest on the date of grant, and the Company recognizes compensation expense on such date. Includes 11,572 time-based RSU awards granted to certain employees and executives, and the Company recognizes compensation expense related to the awards over the respective service periods in accordance with GAAP. Upon vesting, each RSU was converted to one share of common stock.

Intangible Assets (Detail)

Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Apr. 30, 2018	Jul. 31, 2017
Finite Lived Intangible Assets [Line Items]
Number of Years Weighted Average Amortization Period	18 years 6 months	13 years 7 months 6 days
Original Cost	$ 277,338	$ 286,675
Accumulated Amortization	(22,338)	(11,074)
Foreign Currency Translation Adjustment	(691)	(847)
Carrying Amount	254,309	274,754
Total intangible assets not subject to amortization	49,009	45,647
Total intangible assets, net	303,318	320,401
Performance materials-penta product registrations
Finite Lived Intangible Assets [Line Items]
Total intangible assets not subject to amortization	8,765	8,765
Performance materials-related trade name and trademark
Finite Lived Intangible Assets [Line Items]
Total intangible assets not subject to amortization	37,436	34,074
Performance materials-proprietary manufacturing process
Finite Lived Intangible Assets [Line Items]
Total intangible assets not subject to amortization	$ 2,808	$ 2,808
Electronic chemicals-value of product qualifications
Finite Lived Intangible Assets [Line Items]
Number of Years Weighted Average Amortization Period	14 years 1 month 6 days	14 years 1 month 6 days
Original Cost	$ 14,100	$ 14,100
Accumulated Amortization	(6,135)	(5,479)
Foreign Currency Translation Adjustment	(636)	(841)
Carrying Amount	$ 7,329	$ 7,780
Performance materials-customer relationships
Finite Lived Intangible Assets [Line Items]
Number of Years Weighted Average Amortization Period	19 years 8 months 12 days	19 years 8 months 12 days
Original Cost	$ 218,106	$ 227,521
Accumulated Amortization	(11,245)	(3,244)
Foreign Currency Translation Adjustment	14	54
Carrying Amount	$ 206,875	$ 224,331
Performance materials-proprietary manufacturing process
Finite Lived Intangible Assets [Line Items]
Number of Years Weighted Average Amortization Period	15 years	15 years
Original Cost	$ 39,323	$ 39,245
Accumulated Amortization	(2,294)	(322)
Carrying Amount	$ 37,029	$ 38,923
Electronic chemicals-other
Finite Lived Intangible Assets [Line Items]
Number of Years Weighted Average Amortization Period	7 years 4 months 24 days	7 years 4 months 24 days
Original Cost	$ 2,649	$ 2,649
Accumulated Amortization	(1,966)	(1,740)
Foreign Currency Translation Adjustment	(84)	(114)
Carrying Amount	$ 599	$ 795
Performance materials-other
Finite Lived Intangible Assets [Line Items]
Number of Years Weighted Average Amortization Period	6 years 2 months 13 days	6 years 2 months 13 days
Original Cost	$ 3,160	$ 3,160
Accumulated Amortization	(698)	(289)
Foreign Currency Translation Adjustment	15	54
Carrying Amount	$ 2,477	$ 2,925

Intangible Assets (Parenthetica

Intangible Assets (Parenthetical) (Detail)	9 Months Ended	12 Months Ended
	Apr. 30, 2018	Jul. 31, 2017
Minimum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets		15 years
Maximum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets		20 years
Electronic chemicals-value of product qualifications | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	5 years	5 years
Electronic chemicals-value of product qualifications | Maximum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	15 years	15 years
Performance materials-customer relationships | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	15 years
Performance materials-customer relationships | Maximum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	20 years
Performance materials-proprietary manufacturing process
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	15 years	15 years
Electronic chemicals-other | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	1 year	1 year
Electronic chemicals-other | Maximum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	15 years	15 years
Performance materials-other | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	5 years	5 years
Performance materials-other | Maximum
Finite Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	15 years	15 years

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	$ 3,867	$ 608	$ 11,263	$ 1,668

Dividends - Additional Informat

Dividends - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017	Jun. 04, 2018
Dividends Payable [Line Items]
Dividend paid	$ 500	$ 400	$ 1,288	$ 1,066
Dividend per share	$ 0.03	$ 0.03	$ 0.09	$ 0.09
Dividends payable declared date			Jun. 4, 2018
Dividends payable payment date			Jun. 22, 2018
Dividends payable record date			Jun. 15, 2018
Subsequent Event
Dividends Payable [Line Items]
Dividends payable amount per share					$ 0.03

Segment Information - Additiona

Segment Information - Additional Information (Detail)	9 Months Ended
	Apr. 30, 2018Segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Information (Detail)

Segment Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Segment Reporting Information [Line Items]
Total consolidated net sales		$ 118,647	$ 81,616	$ 343,162	$ 237,182
Total consolidated depreciation and amortization				22,359	10,864
Total consolidated operating income		23,953	9,367	65,763	27,087
Total other (expense) income, net		(3,265)	(157)	(19,440)	(562)
Income before income taxes		20,688	9,210	46,323	26,525
Operating Segments
Segment Reporting Information [Line Items]
Total consolidated net sales		118,647	81,616	343,162	237,182
Total consolidated depreciation and amortization		7,664	3,817	22,359	10,864
Total consolidated operating income	[1]	23,953	9,367	65,763	27,087
Total other (expense) income, net		(3,265)	(157)	(19,440)	(562)
Income before income taxes		20,688	9,210	46,323	26,525
Operating Segments | Electronic Chemicals
Segment Reporting Information [Line Items]
Total consolidated net sales		74,669	68,141	222,401	204,829
Total consolidated depreciation and amortization		2,864	2,857	8,418	8,502
Total consolidated operating income	[1]	10,889	8,509	34,877	26,153
Operating Segments | Performance Materials
Segment Reporting Information [Line Items]
Total consolidated net sales		43,978	13,475	120,761	32,353
Total consolidated depreciation and amortization		4,250	549	12,418	1,121
Total consolidated operating income	[1]	16,041	4,224	40,435	10,927
Other Activities
Segment Reporting Information [Line Items]
Total consolidated depreciation and amortization		550	411	1,523	1,241
Total consolidated operating income	[1]	$ (2,977)	$ (3,366)	$ (9,549)	$ (9,993)
[1]	Segment income from operations includes allocated corporate overhead expenses, but excludes restructuring and realignment charges, which are included in other activities.

Schedule of Debt (Detail)

Schedule of Debt (Detail) - USD ($) $ in Thousands	Apr. 30, 2018	Jul. 31, 2017
Debt Instrument [Line Items]
Total debt	$ 330,000	$ 540,000
Current maturities of long-term debt		(3,167)
Unamortized debt issuance costs and original issue discount	(6,450)	(13,731)
Long-term debt, net of current maturities	323,550	523,102
Senior Secured Debt | Term Loan | Debt instrument, maturing on June 15, 2024
Debt Instrument [Line Items]
Total debt	$ 330,000	$ 540,000

Schedule of Debt (Parenthetical

Schedule of Debt (Parenthetical) (Detail) - Senior Secured Debt - Term Loan - Debt instrument, maturing on June 15, 2024	9 Months Ended
	Apr. 30, 2018
Debt Instrument [Line Items]
Loan maturity date	Jun. 15, 2024
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Variable interest rate	2.75%

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)	Jun. 15, 2017	Apr. 30, 2018
Debt Instrument [Line Items]
Credit agreement initiation date	Jun. 15, 2017
Payments of Term Loan		$ 210,000,000
Net proceeds from public offering of common stock		175,669,000
Loss on extinguishment of debt		$ 6,400,000
Through Fiscal Quarter Ended April 30, 2018 | Maximum
Debt Instrument [Line Items]
Consolidated net leverage ratio		6.50%
Until Twelve Months Ended April 30, 2022 | Maximum
Debt Instrument [Line Items]
Consolidated net leverage ratio		4.00%
Term Loan | Senior Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 550,000,000
Line of credit facility, term	7 years
Line of credit facility, outstanding		$ 330,000,000
Line of credit facility, outstanding interest rate		4.651%
Revolving Loan Facility | Senior Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 50,000,000
Line of credit facility, term	5 years
Line of credit facility, outstanding		$ 0
Line of credit facility, additional borrowing capacity		46,800,000
Reserved for outstanding letters of credit		$ 3,200,000
Line of credit facility, outstanding interest rate		4.151%
Percentage of unused commitment fee on unused amount of commitments under revolving loan facility		0.375%

Ratio of Net Funded Debt to Adj

Ratio of Net Funded Debt to Adjusted EBITDA (Detail) - Senior Secured Debt	Jun. 15, 2017
Term Loan | Range One
Debt Instrument [Line Items]
Variable interest rate	2.75%
Term Loan | Range Two
Debt Instrument [Line Items]
Variable interest rate	2.50%
Revolving Loan Facility | Range One
Debt Instrument [Line Items]
Variable interest rate	2.75%
Revolving Loan Facility | Range Three
Debt Instrument [Line Items]
Variable interest rate	2.50%
Revolving Loan Facility | Range Four
Debt Instrument [Line Items]
Variable interest rate	2.25%

Ratio of Net Funded Debt to A55

Ratio of Net Funded Debt to Adjusted EBITDA (Parenthetical) (Detail) - Senior Secured Debt	Jun. 15, 2017
Term Loan | Range One | Minimum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	250.00%
Term Loan | Range Two | Maximum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	250.00%
Revolving Loan Facility | Range One | Minimum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	425.00%
Revolving Loan Facility | Range Three | Minimum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	375.00%
Revolving Loan Facility | Range Three | Maximum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	425.00%
Revolving Loan Facility | Range Four | Maximum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	375.00%

Schedule of Assets and Liabilit

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value Measured on Recurring Basis $ in Thousands	Apr. 30, 2018USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives assets	$ 5,238
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives assets	5,238
Interest Rate Swap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives assets	5,238
Interest Rate Swap | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives assets	$ 5,238

Derivative Financial Instrume57

Derivative Financial Instruments - Additional Information (Detail) - Interest Rate Swap	9 Months Ended
	Apr. 30, 2018USD ($)Counterparty
Derivatives Fair Value [Line Items]
Derivative notional amounts | $	$ 243,000,000
Derivative agreements number of counterparties | Counterparty	2
Derivative agreements termination dates	Jun. 15, 2024
London Interbank Offered Rate (LIBOR)
Derivatives Fair Value [Line Items]
Description of variable rate basis on term loans	The Company entered into certain interest rate swaps with notional amounts totaling $243.0 million, to limit its exposure to variability of the one-month LIBOR floating interest rate on a significant portion of the outstanding balance of its Term Loans.

Derivative Financial Instrume58

Derivative Financial Instruments - Summary of Combined Fair Value of Derivatives not Designated as Hedging Instruments included in Accompanying Condensed Consolidated Balance Sheet (Details) $ in Thousands	Apr. 30, 2018USD ($)
Derivative Instruments – Interest Rate Swaps | Other Assets, Net | Not Designated As Hedging Instruments
Derivatives Fair Value [Line Items]
Fair value of derivatives	$ 5,238

Derivative Financial Instrume59

Derivative Financial Instruments - Summary of Effects of Derivatives not Designated as Hedging Instuments on Condensed Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 30, 2018	Apr. 30, 2018
Derivative Instruments Gain Loss [Line Items]
Effects of derivative instruments	$ 1,365	$ 5,238
Derivative Instruments – Interest Rate Swaps | Derivative Fair Vale Gain | Not Designated As Hedging Instruments
Derivative Instruments Gain Loss [Line Items]
Effects of derivative instruments	$ 1,365	$ 5,238

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended		12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Dec. 21, 2017	Apr. 30, 2018	Apr. 30, 2017	Jul. 31, 2019	Jul. 31, 2018
Income Taxes [Line Items]
Effective income tax rate	24.40%	34.10%			(1.10%)	31.10%
Corporate income tax rate			21.00%	35.00%
Net income tax expense (benefit) from new legislation	$ 11
Deferred tax assets, valuation allowance net	$ 0.2		$ 0.2		$ 0.2
Scenario, Plan
Income Taxes [Line Items]
Corporate income tax rate							21.00%	27.00%

Litigation and Other Continge61

Litigation and Other Contingencies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2017	Apr. 30, 2018	Apr. 30, 2015
Commitments And Contingencies Disclosure [Abstract]
EPA estimated remediation cost	$ 22
Litigation reserve			$ 1.3
Remaining litigation reserve		$ 1

Restructuring and Realignment62

Restructuring and Realignment Events - Additional Information (Detail) $ in Millions	1 Months Ended	9 Months Ended
	Dec. 31, 2015Facility	Apr. 30, 2018USD ($)
Asia | Electronic Chemicals
Restructuring Cost And Reserve [Line Items]
Severance Costs | $		$ 0.1
Milan, Italy
Restructuring Cost And Reserve [Line Items]
Number of closed facilities | Facility	1

Restructuring and Realignment63

Restructuring and Realignment Events - Accrued Liability Associated with Restructuring and Other Related Charges (Detail) $ in Thousands	9 Months Ended
	Apr. 30, 2018USD ($)
Restructuring Cost And Reserve [Line Items]
Accrued liability, Beginning balance	$ 77
Payments	(36)
Adjustments	(41)
Decommissioning and Environmental
Restructuring Cost And Reserve [Line Items]
Accrued liability, Beginning balance	77
Payments	(36)
Adjustments	$ (41)