XML 130 R107.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Subsequent Events (Details) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 17, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares | Dec. 31, 2014 USD ($) | Jan. 05, 2017 right $ / shares shares
Subsequent Event [Line Items] |  |  |  |  |  |
Common stock, par value | $ / shares |  |  | $ 1.00 | $ 1.00 |  |
Proceeds from sale of oil and gas property and equipment |  |  | $ 80,374,000 | $ 17,800,000 | $ 17,660,000 |
Non-cash impairment charges |  |  | $ 60,939,000 | $ 108,184,000 | $ 15,934,000 |
Forecast | The Mineral Companies | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Gain on disposition of oil and gas property |  | $ 82,400,000 |  |  |  |
Gain of sale of assets |  | 10,600,000 |  |  |  |
Non-cash impairment charges |  | $ 37,900,000 |  |  |  |
Subsequent Event |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Number of rights issued | right |  |  |  |  |  | 1
Common stock, par value | $ / shares |  |  |  |  |  | $ 1.00
Subsequent Event | The Mineral Companies | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Purchase price of properties sold | $ 85,600,000 |  |  |  |  |
Proceeds from sale of oil and gas property and equipment | $ 75,000,000 |  |  |  |  |
Subsequent Event | Series B Preferred Stock |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Number of securities called by each right | shares |  |  |  |  |  | 0.001
Preferred stock, par value | $ / shares |  |  |  |  |  | $ 0.01
Purchase price of stock called by each right (dollars in share) | $ / shares |  |  |  |  |  | $ 50

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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