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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Statement of Stockholders' Equity [Abstract] |  |  |
Cumulative Effect on Retained Earnings, Tax | $ 0 | $ 300 | $ 0
Unrealized loss on investment, taxes | 657 | (141) | 208
Reclassification adjustment for gain on investment, taxes | $ 1,198 | $ 0 | $ 805
Common stock, dividends per share, paid | $ 0.81 | $ 0.78 | $ 0.75

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- Definition Aggregate dividends paid 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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