Supplementary Data - Selected Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 31, 2013 |
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, 2013 |
Sep. 30, 2013 |
Jun. 30, 2013 |
Mar. 31, 2013 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Quarterly Financial Information Disclosure [Abstract] | ||||||||||||||||
| Net revenue | $ 25,492 | $ 33,941 | $ 38,605 | $ 33,298 | $ 55,070 | $ 68,124 | $ 73,408 | $ 61,927 | $ 58,565 | $ 44,196 | $ 42,272 | $ 36,269 | $ 131,336 | $ 258,529 | $ 181,302 | |
| Net operating expenses | (38,671) | (272,462) | (46,970) | (45,686) | (50,136) | (45,525) | (50,812) | (44,899) | (40,402) | (34,314) | (31,329) | (31,665) | (403,789) | (191,372) | (137,710) | |
| Interest expense, net | (6,436) | (6,465) | (6,243) | (5,922) | (5,715) | (5,442) | (5,357) | (5,137) | (5,225) | (5,179) | (2,451) | (1,229) | (25,066) | (21,651) | (14,084) | |
| Gain on debt extinguishment | 9,080 | 1,483 | 10,563 | |||||||||||||
| Equity in earnings (losses) of investee | 5 | (186) | (4) | 340 | (64) | (116) | (181) | 156 | ||||||||
| Gain on sale of Wildcat pipeline | $ 90,700 | 90,743 | 90,743 | |||||||||||||
| Realized gain (loss) on commodity derivatives | 14,552 | 12,755 | 9,281 | 15,901 | 7,782 | (764) | (3,320) | (1,339) | 199 | (840) | (714) | 307 | 52,489 | 2,359 | (1,048) | |
| Unrealized (loss) gain on commodity derivatives | (10,285) | 296 | (13,904) | (9,321) | 36,907 | 18,810 | (7,678) | (5,926) | (1,348) | (3,438) | 4,290 | (4,100) | (33,214) | 42,113 | (4,596) | |
| Other income (expense) | 225 | (91) | 12 | 26 | 176 | (109) | 172 | 67 | ||||||||
| (LOSS) INCOME BEFORE INCOME TAX (BENEFIT) PROVISION | (6,043) | (230,543) | (19,219) | (11,704) | 44,089 | 35,203 | 5,946 | 4,626 | 102,528 | 765 | 12,004 | (534) | (267,509) | 89,864 | 114,763 | |
| Income tax provision (benefit) | (284) | (81,756) | (7,369) | (3,996) | 17,102 | 12,756 | 2,153 | 1,681 | 38,207 | 270 | 4,217 | (187) | (93,405) | 33,692 | 42,507 | |
| NET (LOSS) INCOME | $ (5,759) | $ (148,787) | $ (11,850) | $ (7,708) | $ 26,987 | $ 22,447 | $ 3,793 | $ 2,945 | $ 64,321 | $ 495 | $ 7,787 | $ (347) | $ (174,104) | $ 56,172 | $ 72,256 | |
| Basic net income (loss) applicable to common stockholders per common share | $ (0.14) | $ (3.67) | $ (0.29) | $ (0.19) | $ 0.68 | $ 0.57 | $ 0.10 | $ 0.08 | $ 1.65 | $ 0.01 | $ 0.20 | $ (0.01) | $ (4.30) | $ 1.43 | $ 1.85 | |
| Diluted net income (loss) applicable to common stockholders per common share | $ (0.14) | $ (3.67) | $ (0.29) | $ (0.19) | $ 0.68 | $ 0.57 | $ 0.10 | $ 0.08 | $ 1.65 | $ 0.01 | $ 0.20 | $ (0.01) | $ (4.30) | $ 1.42 | $ 1.85 | |