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EARNINGS PER SHARE (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Earnings Per Share Reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  | 44,182 | 44,389 | 46,624
Dilutive effect of stock options and deferred stock compensation |  |  |  |  |  |  |  |  | 579 | 656 | 992
Diluted |  |  |  |  |  |  |  |  | 44,761 | 45,045 | 47,616
Earnings from continuing operations | $ 1.54 | $ 1.45 | $ 1.15 | $ 0.74 | $ 1.60 | $ 1.04 | $ 0.90 | $ 0.74 | $ 4.86 | $ 4.27 | $ 4.12
Earnings from continuing operations | $ 1.52 | $ 1.43 | $ 1.13 | $ 0.73 | $ 1.58 | $ 1.02 | $ 0.88 | $ 0.73 | $ 4.80 | $ 4.20 | $ 4.04
Earnings from continuing operations | $ 67,750 | $ 63,944 | $ 50,650 | $ 32,547 | $ 70,668 | $ 45,932 | $ 39,963 | $ 32,819 | $ 214,891 | $ 189,382 | $ 192,248

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- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4613673-111683 + Details
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