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v3.3.0.814

Summary of Change in Stockholder's Equity (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Stockholders Equity Note [Line Items] |  |  |  |
Balance at Beginning of Period |  |  | $ 1,010,593 |
Net Earnings | $ 29,819 | $ 50,319 | 67,581 | $ 88,029
Balance at End of Period | 1,069,691 |  | 1,069,691 |
Common Stock [Member] |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Balance at Beginning of Period |  |  | 502 |
Stock Option Exercises |  |  | 1 |
Balance at End of Period | 503 |  | 503 |
Capital in Excess of Par Value [Member] |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Balance at Beginning of Period |  |  | 272,441 |
Stock Compensation Expense |  |  | 8,329 |
Shares Redeemed to Settle Employee Taxes |  |  | (1,728) |
Stock Option Exercises |  |  | 5,074 |
Share Repurchases and Retirement |  |  | (10,744) |
Balance at End of Period | 273,372 |  | 273,372 |
Retained Earnings [Member] |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Balance at Beginning of Period |  |  | 749,717 |
Dividends Declared to Stockholders |  |  | (10,054) |
Net Earnings |  |  | 67,581 |
Balance at End of Period | 807,244 |  | 807,244 |
Accumulated Other Comprehensive Losses [Member] |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Balance at Beginning of Period |  |  | (12,067) |
Change in Funded Status of Pension Plan, net of tax |  |  | 639 |
Balance at End of Period | $ (11,428) |  | $ (11,428) |

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- Definition This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415241&loc=d3e4534-113899 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11149-113907 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11178-113907 + Details
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