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Selected Quarterly Financial Data (Tables) | 12 Months Ended
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Sep. 30, 2017
Selected Quarterly Financial Data |
|  | Three Months Ended |  |  |  |
(in thousands—except per unit data) |  | Dec. 31, 2016 |  |  | Mar. 31, 2017 |  |  | Jun. 30, 2017 |  |  | Sep. 30, 2017 |  |  | Total |
Sales |  | $ | 384,118 |  |  | $ | 532,052 |  |  | $ | 225,801 |  |  | $ | 181,584 |  |  | $ | 1,323,555 |
Gross profit for product, installation and service |  | $ | 118,038 |  |  | $ | 184,685 |  |  | $ | 63,309 |  |  | $ | 42,467 |  |  |  | 408,499 |
Operating income (loss) |  | $ | 33,237 |  |  | $ | 69,032 |  |  | $ | (19,811 | ) |  | $ | (27,126 | ) |  |  | 55,332 |
Income (loss) before income taxes |  | $ | 31,138 |  |  | $ | 66,996 |  |  | $ | (21,766 | ) |  | $ | (29,092 | ) |  |  | 47,276 |
Net income (loss) |  | $ | 18,275 |  |  | $ | 39,704 |  |  | $ | (13,332 | ) |  | $ | (17,747 | ) |  |  | 26,900 |
Limited Partner interest in net income (loss) |  | $ | 18,170 |  |  | $ | 39,471 |  |  | $ | (13,253 | ) |  | $ | (17,644 | ) |  |  | 26,744 |
Net income (loss) per Limited Partner unit: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted (a) |  | $ | 0.28 |  |  | $ | 0.59 |  |  | $ | (0.24 | ) |  | $ | (0.32 | ) |  | $ | 0.46 |
|  | Three Months Ended |  |  |  |
(in thousands—except per unit data) |  | Dec. 31, 2015 |  |  | Mar. 31, 2016 |  |  | Jun. 30, 2016 |  |  | Sep. 30, 2016 |  |  | Total |
Sales |  | $ | 319,055 |  |  | $ | 462,025 |  |  | $ | 218,194 |  |  | $ | 162,064 |  |  | $ | 1,161,338 |
Gross profit for product, installation and service |  |  | 106,041 |  |  |  | 183,303 |  |  |  | 61,354 |  |  | $ | 41,799 |  |  |  | 392,497 |
Operating income (loss) |  |  | 23,646 |  |  |  | 96,319 |  |  |  | (2,955 | ) |  | $ | (29,606 | ) |  |  | 87,404 |
Income (loss) before income taxes |  |  | 21,475 |  |  |  | 94,113 |  |  |  | (4,993 | ) |  | $ | (31,923 | ) |  |  | 78,672 |
Net income (loss) |  |  | 12,058 |  |  |  | 55,209 |  |  |  | (3,238 | ) |  | $ | (19,095 | ) |  |  | 44,934 |
Limited Partner interest in net income (loss) |  |  | 11,990 |  |  |  | 54,896 |  |  |  | (3,219 | ) |  | $ | (18,985 | ) |  |  | 44,682 |
Net income (loss) per Limited Partner unit: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted (a) |  | $ | 0.19 |  |  | $ | 0.79 |  |  | $ | (0.06 | ) |  | $ | (0.34 | ) |  | $ | 0.70 |
(a) The sum of the quarters do not add-up to the total due to the weighting of Limited Partner Units outstanding, rounding or the theoretical effects of FASB ASC 260-10-45-60 to Master Limited Partners earnings per unit.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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