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CONDENSED CONSOLIDATED STATEMENTS OF INCOME - UNAUDITED - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2018 | Oct. 31, 2017
Revenue, net | $ 448,622 | $ 451,731 |  | $ 859,523 | $ 863,175 |
Costs and Expenses |  |  |  |  |  |
Cost of sales | 120,157 | 119,865 |  | 234,548 | 234,653 |
Operating and administrative expenses | 248,627 | 241,301 | [1] | 502,400 | 487,039 | [1]
Restructuring and related charges (credits) | 9,996 | (1,406) |  | 3,910 | 24,323 |
Amortization of intangibles | 12,367 | 11,183 |  | 25,050 | 23,802 |
Total Costs and Expenses | 391,147 | 370,943 |  | 765,908 | 769,817 |
Operating Income | 57,475 | 80,788 | [2] | 93,615 | 93,358 | [2]
Interest Expense | (3,608) | (3,455) |  | (6,404) | (6,728) |
Foreign Exchange Transaction Losses | (54) | (416) |  | (1,783) | (5,552) |
Interest and Other Income | 2,509 | 2,559 |  | 4,975 | 4,494 |
Income Before Taxes | 56,322 | 79,476 |  | 90,403 | 85,572 |
Provision for Income Taxes | 12,538 | 19,428 |  | 20,324 | 16,288 |
Net Income | $ 43,784 | $ 60,048 |  | $ 70,079 | $ 69,284 |
Earnings Per Share |  |  |  |  |  |
Basic (in dollars per share) | $ 0.76 | $ 1.06 |  | $ 1.22 | $ 1.22 |
Diluted (in dollars per share) | $ 0.76 | $ 1.04 |  | $ 1.21 | $ 1.20 |
Weighted Average Number of Common Shares Outstanding |  |  |  |  |  |
Basic (in shares) | 57,379 | 56,875 |  | 57,392 | 56,948 |
Diluted (in shares) | 57,870 | 57,554 |  | 57,955 | 57,633 |
Class A Common [Member] |  |  |  |  |  |
Cash Dividends Per Share |  |  |  |  |  |
Common stock (in dollars per share) | $ 0.33 | $ 0.32 |  | $ 0.66 | $ 0.64 |
Class B Common [Member] |  |  |  |  |  |
Cash Dividends Per Share |  |  |  |  |  |
Common stock (in dollars per share) | $ 0.33 | $ 0.32 |  | $ 0.66 | $ 0.64 |
[1] | Due to the retrospective adoption of Accounting Standards Update ("ASU") 2017-07, total net benefits of $2.0 million and $3.9 million related to the non-service components of defined benefit and other post-employment benefit plans were reclassified from Operating and Administrative Expenses to Interest and Other Income for the three and six months ended October 31, 2017, respectively. Total net benefits related to the non-service components of defined benefit and other post-employment benefit plans were $2.1 million and $4.5 million for the three and six months ended October 31, 2018, respectively. Refer to Note 2, "Recent Accounting Standards," in the Notes to Condensed Consolidated Financial Statements for more information.
[2] | Due to the retrospective adoption of ASU 2017-07, total net benefits of $2.0 million and $3.9 million related to the non-service components of defined benefit and other post-employment benefit plans were reclassified from Operating and Administrative Expenses to Interest Income and Other for the three and six months ended October 31, 2017, respectively. Refer to Note 2, "Recent Accounting Standards," in the Notes to Condensed Consolidated Financial Statements for more information. The impact of the reclassification on Contribution to Profit by segment for the three months ended October 31, 2017 was $1.0 million in Research, $0.6 million in Publishing, and $0.4 million in Corporate expenses. The impact of the reclassification on Contribution to Profit by segment for the six months ended October 31, 2017 was $2.0 million in Research, $1.1 million in Publishing, and $0.8 million in Corporate expenses.

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