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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Deferred income taxes	$ 4,050	$ 2,664	$ 7,039	$ 3,442
Changes in Fair Value of Marketable Securities [Member]
Deferred income taxes	58	434	96	693
Unrealized Losses on Marketable Securities [Member]
Deferred income taxes	$ 0	$ 0	$ 0	$ 0

X

- Definition

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 28



-Subparagraph (b)



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Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Deferred Tax Expense (or Benefit)



-URI http://asc.fasb.org/extlink&oid=6510177



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section 50



-Paragraph 9



-Subparagraph (b)



-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



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-SubTopic 10



-Section S99



-Paragraph 1



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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



Reference 5: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SAB TOPIC 6.I.7)



-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817



Reference 6: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Staff Accounting Bulletin (SAB)



-Number Topic 6



-Section I



-Subsection 7

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