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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Issuance of restricted stock | $ 1 |  | $ 1 | $ 0 |
Capital increase related to Equity Incentive Plan | $ 4,265 |  | $ 698 | $ 3,457 |
Common stock, dividends per share (in USD per share) | $ 1.78 |  | $ 1.60 | $ 1.60 |
Common Stock [Member] |  |  |  |  |
Issuance of restricted stock | $ 1 |  | $ 1 | $ 0 | [1]
Capital increase related to Equity Incentive Plan | $ 0 | [1] | $ 2 |  |
[1] | Rounds to zero.

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- Definition Aggregate value of stock related to Restricted Stock Awards issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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