Stockholders' Equity - Dividend Activity (Details) - USD ($) |
12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Nov. 24, 2017 |
Aug. 31, 2017 |
May 19, 2017 |
Mar. 03, 2017 |
Nov. 25, 2016 |
Aug. 26, 2016 |
May 20, 2016 |
Mar. 24, 2016 |
Nov. 20, 2015 |
Aug. 28, 2015 |
May 29, 2015 |
Mar. 27, 2015 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Stockholders' Equity Note [Abstract] | |||||||||||||||
| Dividends Per Share, Common (in dollars per share) | $ 0.12 | $ 0.11 | $ 0.10 | $ 0.09 | $ 0.08 | $ 0.07 | $ 0.06 | $ 0.05 | $ 0.05 | $ 0.04 | $ 0.03 | $ 0.02 | $ 1.52 | $ 0.61 | $ 0.14 |
| CommonStockSpecialDividendsPerShareDeclared | $ 0.15 | $ 0.25 | $ 0.35 | $ 0.35 | $ 0.35 | ||||||||||
| Dividends, cash | $ 1,360,000 | $ 1,246,000 | $ 1,133,000 | $ 1,019,000 | $ 901,000 | $ 787,000 | $ 686,000 | $ 576,000 | $ 598,000 | $ 489,000 | $ 372,000 | $ 250,000 | $ 17,218,000 | $ 6,891,000 | $ 1,709,000 |
| Payment Date | Nov. 24, 2017 | Aug. 31, 2017 | May 19, 2017 | Mar. 03, 2017 | Nov. 25, 2016 | Aug. 26, 2016 | May 20, 2016 | Mar. 24, 2016 | Nov. 20, 2015 | Aug. 28, 2015 | May 29, 2015 | Mar. 27, 2015 | |||
| Dividends, Common Stock, Cash | $ 1,701,000 | $ 2,833,000 | $ 3,964,000 | $ 3,962,000 | $ 3,941,000 | ||||||||||
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- Definition Special dividends declared during the period for each share of common stock outstanding. No definition available.
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of paid and unpaid cash dividends declared for classes of stock, for example, but not limited to, common and preferred. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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