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Summary Selected Quarterly Financial Data (unaudited) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Summary Selected Quarterly Financial Data (Unaudited) | (12) Summary Selected Quarterly Financial Data (unaudited) The following is a summary of selected unaudited consolidated quarterly financial data for the years ended December 31, 2017 and 2016 (in thousands, except per share data):
|  | Three Months Ended |
|  | March 31, |  |  | June 30, |  |  | September 30, |  |  | December 31, |
|  | 2017 |  |  | 2017 |  |  | 2017 |  |  | 2017 |
Total revenues |  | $ | 77,194 |  |  | $ | 89,733 |  |  | $ | 80,369 |  |  | $ | 90,377 |
Income from operations |  | $ | 3,136 |  |  | $ | 10,213 |  |  | $ | 6,749 |  |  | $ | 7,451 |
Net income |  | $ | 3,030 |  |  | $ | 6,064 |  |  | $ | 3,953 |  |  | $ | 2,093 |
Basic income per common share |  | $ | 0.17 |  |  | $ | 0.34 |  |  | $ | 0.22 |  |  | $ | 0.12 |
Diluted income per common share |  | $ | 0.16 |  |  | $ | 0.34 |  |  | $ | 0.22 |  |  | $ | 0.11 |
|  | Three Months Ended |
|  | March 31, |  |  | June 30, |  |  | September 30, |  |  | December 31, |
|  | 2016 |  |  | 2016 |  |  | 2016 |  |  | 2016 |
Total revenues |  | $ | 77,401 |  |  | $ | 87,821 |  |  | $ | 77,427 |  |  | $ | 83,446 |
Income from operations |  | $ | 2,712 |  |  | $ | 11,472 |  |  | $ | 7,552 |  |  | $ | 9,038 |
Net income |  | $ | 1,289 |  |  | $ | 7,460 |  |  | $ | 3,112 |  |  | $ | 5,790 |
Basic income per common share |  | $ | 0.07 |  |  | $ | 0.42 |  |  | $ | 0.17 |  |  | $ | 0.32 |
Diluted income per common share |  | $ | 0.07 |  |  | $ | 0.41 |  |  | $ | 0.17 |  |  | $ | 0.31 |

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- References No definition available. + Details
Name: | us-gaap_QuarterlyFinancialInformationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
Name: | us-gaap_QuarterlyFinancialInformationTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration