v3.3.1.900

Selected Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Net sales | $ 66,004 | $ 49,325 | $ 80,815 | $ 93,050 | $ 74,401 | $ 66,733 | $ 77,215 | $ 80,316 | $ 289,194 | $ 298,665 | $ 323,672
Operating costs and expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of product sold (exclusive of depreciation and amortization) | 9,495 | 14,501 | 15,424 | 25,769 | 15,374 | 15,434 | 19,436 | 21,708 | 65,189 | 71,952 | 58,075
Direct operating expenses (exclusive of depreciation and amortization) | 23,317 | 33,179 | 25,146 | 24,414 | 21,744 | 26,108 | 26,917 | 24,189 | 106,056 | 98,958 | 94,092
Selling, general and administrative expenses (exclusive of depreciation and amortization) | 5,620 | 6,042 | 4,523 | 4,583 | 3,816 | 3,963 | 5,270 | 4,654 | 20,768 | 17,703 | 21,076
Depreciation and amortization | 7,214 | 7,409 | 7,010 | 6,819 | 6,978 | 6,812 | 6,792 | 6,667 | 28,452 | 27,249 | 25,578
Total operating costs and expenses | 45,646 | 61,131 | 52,103 | 61,585 | 47,912 | 52,317 | 58,415 | 57,218 | 220,465 | 215,862 | 198,821
Operating income | 20,358 | (11,806) | 28,712 | 31,465 | 26,489 | 14,416 | 18,800 | 23,098 | 68,729 | 82,803 | 124,851
Interest expense and other financing costs | (1,739) | (1,727) | (1,717) | (1,697) | (1,731) | (1,724) | (1,669) | (1,659) | (6,880) | (6,783) | (6,294)
Interest income | 6 | 10 | 12 | 12 | 11 | 7 | 6 | 6 | 40 | 30 | 74
Other income, net | 99 | 54 | 5 | 6 | 23 | 33 | 0 | 15 | 164 | 71 | 93
Total other income (expense) | (1,634) | (1,663) | (1,700) | (1,679) | (1,697) | (1,684) | (1,663) | (1,638) | (6,676) | (6,682) | (6,127)
Income before income tax expense (benefit) | 18,724 | (13,469) | 27,012 | 29,786 | 24,792 | 12,732 | 17,137 | 21,460 | 62,053 | 76,121 | 118,724
Income tax expense (benefit) | (7) | 9 | (4) | 12 | (55) | 13 | 7 | 7 | 11 | (28) | 108
Net income | $ 18,731 | $ (13,478) | $ 27,016 | $ 29,774 | $ 24,847 | $ 12,719 | $ 17,130 | $ 21,453 | $ 62,042 | $ 76,149 | $ 118,616
Net income per common unit - basic (in dollars per unit) | $ 0.26 | $ (0.18) | $ 0.37 | $ 0.41 | $ 0.34 | $ 0.17 | $ 0.23 | $ 0.29 | $ 0.85 | $ 1.04 | $ 1.62
Net income per common unit - diluted (in dollars per unit) | $ 0.26 | $ (0.18) | $ 0.37 | $ 0.41 | $ 0.34 | $ 0.17 | $ 0.23 | $ 0.29 | $ 0.85 | $ 1.04 | $ 1.62
Weighted-average common units outstanding: |  |  |  |  |  |  |  |  |  |  |
Basic (in units) | 73,123 | 73,123 | 73,123 | 73,123 | 73,117 | 73,115 | 73,113 | 73,113 | 73,123 | 73,115 | 73,072
Diluted (in units) | 73,131 | 73,123 | 73,131 | 73,131 | 73,133 | 73,139 | 73,146 | 73,145 | 73,131 | 73,139 | 73,228
Affiliates |  |  |  |  |  |  |  |  |  |  |
Operating costs and expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of product sold (exclusive of depreciation and amortization) | $ 1,552 | $ 1,147 | $ 2,184 | $ 1,818 | $ 2,619 | $ 2,232 | $ 2,327 | $ 2,246 | $ 6,701 | $ 9,424 | $ 10,791
Direct operating expenses (exclusive of depreciation and amortization) | 841 | 1,030 | 1,195 | 1,027 | 833 | 621 | 817 | 753 | 4,093 | 3,024 | 4,072
Selling, general and administrative expenses (exclusive of depreciation and amortization) | 3,672 | 3,661 | 3,361 | 3,267 | 2,867 | 3,035 | 3,973 | 3,536 | 13,961 | 13,411 | 16,118
Third parties |  |  |  |  |  |  |  |  |  |  |
Operating costs and expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of product sold (exclusive of depreciation and amortization) | 7,943 | 13,354 | 13,240 | 23,951 | 12,755 | 13,202 | 17,109 | 19,462 | 58,488 | 62,528 | 47,284
Direct operating expenses (exclusive of depreciation and amortization) | 22,476 | 32,149 | 23,951 | 23,387 | 20,911 | 25,487 | 26,100 | 23,436 | 101,963 | 95,934 | 90,020
Selling, general and administrative expenses (exclusive of depreciation and amortization) | $ 1,948 | $ 2,381 | $ 1,162 | $ 1,316 | $ 949 | $ 928 | $ 1,297 | $ 1,118 | $ 6,807 | $ 4,292 | $ 4,958

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