v3.8.0.1

Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Weighted average shares, issuance of restricted stock |  |  |  |  |  |  |  |  | 100 | 100 | 100
Nonvested restricted stock shares excluded from total weighted average shares | 0 |  |  |  | 100 |  |  |  | 0 | 100 | 300
Numerator: |  |  |  |  |  |  |  |  |  |  |
Basic net income (loss) | $ (23,545) | $ (1,477) | $ 647 | $ 2,439 | $ 17,058 | $ 11,897 | $ 117,361 | $ 791 | $ (21,936) | $ 147,107 | $ 11,950
Effect of diluted securities |  |  |  |  |  |  |  |  |  | 2,969 |
Diluted net income (loss) |  |  |  |  |  |  |  |  | $ (21,936) | $ 150,076 | $ 11,950
Denominator: |  |  |  |  |  |  |  |  |  |  |
Basic weighted average shares outstanding (in shares) |  |  |  |  |  |  |  |  | 22,493 | 22,346 | 22,010
Effect of diluted securities (in shares) |  |  |  |  |  |  |  |  |  | 4,163 | 120
Diluted weighted average shares outstanding (in shares) |  |  |  |  |  |  |  |  | 22,493 | 26,509 | 22,130
Basic earnings (loss) per share (in dollars per share) | $ (1.05) | $ (0.07) | $ 0.03 | $ 0.11 | $ 0.77 | $ 0.53 | $ 5.24 | $ 0.04 | $ (0.98) | $ 6.58 | $ 0.54
Diluted earnings (loss) per share (in dollars per share) | $ (1.05) | $ (0.07) | $ 0.03 | $ 0.11 | $ 0.68 | $ 0.49 | $ 4.45 | $ 0.04 | $ (0.98) | $ 5.66 | $ 0.54

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