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Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 | Mar. 31, 2013
Sales: |  |  |  |  |  |  |  |
Product | $ 839,953 |  | $ 732,949 |  | $ 1,303,340 |  | $ 1,187,419 |
Installations and service | 52,288 |  | 52,190 |  | 109,511 |  | 114,245 |
Total sales | 892,241 |  | 785,139 |  | 1,412,851 |  | 1,301,664 |
Cost and expenses: |  |  |  |  |  |  |  |
Cost of product | 639,564 |  | 571,790 |  | 998,141 |  | 928,403 |
Cost of installations and service | 53,032 |  | 51,338 |  | 106,475 |  | 108,559 |
(Increase) decrease in the fair value of derivative instruments | 4,105 |  | (3,447) |  | (1,353) |  | 4,518 |
Delivery and branch expenses | 92,428 |  | 83,322 |  | 160,828 |  | 151,709 |
Depreciation and amortization expenses | 4,917 |  | 4,321 |  | 9,276 |  | 8,679 |
General and administrative expenses | 6,449 |  | 4,761 |  | 11,855 |  | 9,252 |
Finance charge income | (2,207) |  | (2,174) |  | (3,211) |  | (3,262) |
Operating income | 93,953 |  | 75,228 |  | 130,840 |  | 93,806 |
Interest expense, net | (4,274) |  | (4,014) |  | (7,897) |  | (7,431) |
Amortization of debt issuance costs | (390) |  | (418) |  | (811) |  | (910) |
Income before income taxes | 89,289 |  | 70,796 |  | 122,132 |  | 85,465 |
Income tax expense | 37,073 |  | 29,117 |  | 50,628 |  | 34,034 |
Net income | 52,216 |  | 41,679 |  | 71,504 |  | 51,431 |
General Partner's interest in net income | 294 |  | 225 |  | 403 |  | 278 |
Limited Partners' interest in net income | $ 51,922 |  | $ 41,454 |  | $ 71,101 |  | $ 51,153 |
Basic and diluted income per Limited Partner Unit | $ 0.75 | [1] | $ 0.58 | [1] | $ 1.03 | [1] | $ 0.72 | [1]
Weighted average number of Limited Partner units outstanding: |  |  |  |  |  |  |  |
Basic and Diluted | 57,468 |  | 59,837 |  | 57,490 |  | 60,192 |
[1] | See Note 14 Earnings Per Limited Partner Unit.

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