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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Basic Net Earnings Per Common Share [Abstract] |  |
Earnings (loss) from continuing operations | $ 8,597 | $ 16,367
Loss from discontinued operations | (608) | (633)
Net earnings available to common stockholders | $ 7,989 | $ 15,734
Weighted average common shares outstanding (in shares) | 22,498,510 | 22,846,595
Earnings from continuing operations per common share (in dollars per share) | $ 0.38 | $ 0.72
Loss from discontinued operations per common share (in dollars per share) | (0.02) | (0.03)
Net earnings per common share - Basic (in dollars per share) | $ 0.36 | $ 0.69
Diluted Net Earnings Per Common Share [Abstract] |  |
Earnings from continuing operations | $ 8,597 | $ 16,367
Loss from discontinued operations | (608) | (633)
Net earnings available to common stockholders | $ 7,989 | $ 15,734
Weighted average common shares outstanding (in shares) | 22,498,510 | 22,846,595
Plus incremental shares from assumed conversions [Abstract] |  |
Dilutive effect of restricted shares and performance shares (in shares) | 468,000 | 467,000
Weighted average common shares outstanding - Diluted (in shares) | 22,967,281 | 23,313,773
Earnings from continuing operations per common share (in dollars per share) | $ 0.37 | $ 0.70
Loss from discontinued operations per common share (in dollars per share) | (0.02) | (0.03)
Net earnings per common share - Diluted (in dollars per share) | $ 0.35 | $ 0.67
Restricted and Performance Shares [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 277,000 | 249,000

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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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