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Quarterly Financial Data (Unaudited) - Consolidated Operating Results by Quarter (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 2,102,966 | $ 2,042,186 | $ 1,792,430 | $ 1,713,737 | $ 1,899,272 | $ 1,939,438 | $ 1,872,340 | $ 1,861,386 | $ 7,651,319 | $ 7,572,436 | $ 7,747,229
Gross profit | 307,688 | 302,582 | 200,217 | 203,313 | 223,039 | 235,215 | 227,505 | 237,906 | 1,013,800 | 923,665 | 1,168,794
Net income (loss) | 88,358 | 74,152 | 16,729 | 20,859 | (4,882) | 218,956 | 49,565 | 58,185 | 200,098 | 321,824 | 315,082
Net income (loss) attributable to common stock | 87,583 | 73,742 | 16,562 | 20,496 | (5,074) | 216,388 | 46,109 | 53,484 | 198,383 | 310,907 | 296,714
Net income (loss) from continuing operations attributable to common stock | $ 88,530 | $ 73,137 | $ 16,562 | $ 20,496 | $ (2,586) | $ 43,176 | $ 32,007 | $ 47,689 | $ 198,725 | $ 120,286 | $ 269,224
Earnings (loss) per share from continuing operations attributable to common stock - basic and diluted | $ 0.57 | $ 0.47 | $ 0.11 | $ 0.13 | $ (0.02) | $ 0.23 | $ 0.15 | $ 0.22 | $ 1.26 | $ 0.62 | $ 1.22

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