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Acquisition (Pro Forma Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012
Acquisition [Abstract] |  |
Net operating revenue | $ 59,397 | $ 56,717
Net earnings | $ 5,153 | $ 2,143
Basic and diluted earnings per share | $ 0.21 | $ 0.09

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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463 + Details
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