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Earning Per Common Share (Schedule of Earnings Per Share, Basic and Diluted) (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
Numerator for basic and diluted earnings (loss) per common share: |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ 289 | $ 3,222 | $ 3,024 | $ (2,422) | $ (40,851) | $ (5,982) | $ (91,996) | $ (2,832) | $ 4,113 | $ (141,660) | $ (44,445)
Denominator: |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding (shares) |  |  |  |  |  |  |  |  | 10,334 | 10,273 | 10,254
Denominator for basic earnings per common share (shares) |  |  |  |  |  |  |  |  | 10,334 | 10,273 | 10,254
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Other stock compensation plans (shares) |  |  |  |  |  |  |  |  | 149 | 0 | 0
Dilutive potential common shares (shares) |  |  |  |  |  |  |  |  | 149 | 0 | 0
Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversions (shares) |  |  |  |  |  |  |  |  | 10,483 | 10,273 | 10,254
Basic earnings (loss) per common share (usd per share) | $ 0.03 | $ 0.31 | $ 0.29 | $ (0.23) | $ (3.97) | $ (0.58) | $ (8.96) | $ (0.28) | $ 0.40 | $ (13.79) | $ (4.33)
Diluted earnings (loss) per common share (usd per share) | 0.03 | 0.31 | 0.29 | (0.23) | (3.97) | (0.58) | (8.96) | (0.28) | 0.39 | (13.79) | (4.33)
Dividends paid per common share (usd per share) | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0.04 | $ 0.04 | $ 0.04 | $ 0.00 | $ 0.12 | $ 0.16
Antidilutive shares excluded from computation of earnings per share (shares) |  |  |  |  |  |  |  |  |  | 143 | 130

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=96948231&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1252-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1252-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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