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Dividends Declared and Paid - Dividend Information (Details) - $ / shares | 1 Months Ended | 3 Months Ended | 12 Months Ended
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Dec. 30, 2018 | Nov. 30, 2018 | Oct. 31, 2018 | Sep. 30, 2018 | Aug. 31, 2018 | Jul. 31, 2018 | Jun. 29, 2018 | May 31, 2018 | Apr. 30, 2018 | Mar. 30, 2018 | Feb. 28, 2018 | Jan. 30, 2018 | Dec. 30, 2017 | Nov. 30, 2017 | Oct. 31, 2017 | Sep. 29, 2017 | Aug. 31, 2017 | Jul. 31, 2017 | Jun. 29, 2017 | May 31, 2017 | Apr. 30, 2017 | Mar. 30, 2017 | Feb. 28, 2017 | Jan. 30, 2017 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Share Distribution Amount (in dollars per share) | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.33 | $ 0.33 | $ 0.33 | $ 0.33 | $ 0.33 | $ 0.33 | $ 0.33 | $ 0.33 | $ 1.32 | $ 1.32
LTIP Unit Distribution Amount (in dollars per share) | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 1.32 | 1.32
Ordinary Income (in dollars per share) | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.0954 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.1042 | 0.2862 | 0.2862 | 0.2862 | 0.2862 | 0.3126 | 0.3126 | 0.3126 | 0.3126 | 1.1448 | 1.2504
Capital Gain (in dollars per share) | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 | $ 0.0146 |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0438 | $ 0.0438 | $ 0.0438 | $ 0.0438 |  |  |  |  | $ 0.1752 |
Unrecaptured section 1250 gain (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 | $ 0.0058 |  |  |  |  | $ 0.0174 | $ 0.0174 | $ 0.0174 | $ 0.0174 |  | $ 0.0696

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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