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Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  | 6 Months Ended
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May 18, 2016 | Feb. 16, 2016 | Oct. 30, 2015 | Aug. 17, 2015 | May 18, 2015 | Feb. 17, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Distributions |  |  |  |  |  |  |  |
Dividend declared per common stock (in dollars per share) | $ 0.095 | $ 0.1875 | $ 0.15 | $ 0.15 | $ 0.15 | $ 0.15 |  |
Total Dividends | $ 6,700 | $ 13,100 | $ 10,400 | $ 10,500 | $ 10,400 | $ 10,300 | $ 19,763 | $ 20,743

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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