Significant Accounting Policies (Narrative) (Details) - USD ($)
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|
3 Months Ended |
12 Months Ended |
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|
Jan. 01, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Apr. 02, 2019 |
Jan. 03, 2019 |
| Significant Accounting Policies [Line Items] |
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|
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| Capitalized development and construction salaries and other related costs |
|
$ 600,000
|
|
$ 600,000
|
|
|
|
| Maximum period after cessation of major construction activity that projects are considered complete |
|
1 year
|
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|
|
|
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| Threshold of investment value for discontinuation of equity method accounting |
|
$ 0
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|
|
|
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| Amortization of deferred financing costs |
|
1,189,000
|
|
1,096,000
|
|
|
|
| Loss from extinguishment of debt, net |
|
1,311,000
|
|
(10,289,000)
|
|
|
|
| Write-off of unamortized deferred financing costs |
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|
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105,000
|
|
|
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| Deferred leasing costs |
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|
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693,000
|
|
|
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| Leasing personnel costs |
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742,000
|
|
|
|
|
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| Deferred tax asset |
|
11,600,000
|
|
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$ 5,300,000
|
|
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| Income taxes, material adjustment amount |
|
$ 0
|
|
|
|
|
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| Common stock, shares outstanding |
|
90,325,783
|
90,320,306
|
|
|
|
90,320,408
|
| Common units outstanding |
|
10,009,355
|
10,229,349
|
|
|
|
10,174,285
|
| LTIP units outstanding |
|
1,826,331
|
1,707,106
|
|
|
|
1,762,170
|
| Distributions payable, record date |
|
Apr. 02, 2019
|
Jan. 03, 2019
|
|
|
|
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| Distributions payable, approved date |
|
Mar. 14, 2019
|
Dec. 11, 2018
|
|
|
|
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| Common stock dividends and common unit distributions per share |
|
$ 0.20
|
$ 0.20
|
|
|
|
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| Restricted stock expense |
|
$ 1,880,000
|
|
2,532,000
|
|
|
|
| Distributions payable, pay date |
|
Apr. 12, 2019
|
Jan. 11, 2019
|
|
|
|
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| Increase (decrease) to valuation allowance |
|
|
|
|
$ (5,300,000)
|
|
|
| Federal income tax rate |
|
21.00%
|
|
|
|
|
|
| Loss from extinguishment of debt, net |
|
$ 1,311,000
|
|
$ (10,289,000)
|
|
|
|
| Accounting Standards Update 2017-12 [Member] |
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| Significant Accounting Policies [Line Items] |
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| Adjustment to retained earnings |
$ 400,000
|
|
|
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| Subsequent Event [Member] |
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| Significant Accounting Policies [Line Items] |
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| Common stock, shares outstanding |
|
|
|
|
|
90,326,046
|
|
| Common units outstanding |
|
|
|
|
|
9,876,865
|
|
| LTIP units outstanding |
|
|
|
|
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1,958,821
|
|