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Quarterly Financial Data | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Data [Abstract] |
Quarterly Financial Data | (14)Quarterly Financial Data (Unaudited) ﻿ Summarized quarterly financial data is as follows:
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿
| Three Months Ended
| March 31 |  | June 30 |  | September 30 |  | December 31
| (In thousands, except per share data)
2016: |  |  |  |  |  |  |
﻿Revenue | $ | 75,885 |  |  | $ | 68,564 |  |  | $ | 65,767 |  |  | $ | 71,234 |
﻿Operating income | 13,745 |  |  | 10,987 |  |  | 7,946 |  |  | 8,237 |
﻿Net income (loss) * | 6,162 |  |  | 5,853 |  |  | 4,322 |  |  | (3,827 | )
﻿Basic income per common share | $ | 0.21 |  |  | $ | 0.19 |  |  | $ | 0.14 |  |  | $ | (0.13 | )
2015: |  |  |  |  |  |  |
﻿Revenue | $ | 98,001 |  |  | $ | 95,253 |  |  | $ | 82,013 |  |  | $ | 64,853 |
﻿Operating income | 16,459 |  |  | 12,631 |  |  | 10,986 |  |  | 3,549 |
﻿Net income | 7,591 |  |  | 6,853 |  |  | 5,144 |  |  | 544 |
﻿Basic income per common share | $ | 0.25 |  |  | $ | 0.23 |  |  | $ | 0.17 |  |  | $ | 0.02 |
______________________ * See Note 3 related to asset impairment taken in December 2016. ﻿

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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