Significant Accounting Policies (Narrative) (Details) - USD ($)
|
3 Months Ended |
12 Months Ended |
|
|
Mar. 31, 2016 |
Dec. 31, 2015 |
Mar. 31, 2015 |
Dec. 31, 2015 |
Apr. 05, 2016 |
Jan. 06, 2016 |
| Significant Accounting Policies [Line Items] |
|
|
|
|
|
|
| Capitalized development and construction salaries and other related costs |
$ 600,000
|
|
$ 1,300,000
|
|
|
|
| Construction, tenant improvement, and development in-progress |
$ 144,900,000
|
$ 88,700,000
|
|
$ 88,700,000
|
|
|
| Maximum period after cessation of major construction activity that projects are considered complete |
1 year
|
|
|
|
|
|
| Threshold of investment value for discontinuation of equity method accounting |
$ 0
|
|
|
|
|
|
| Amortization of deferred financing costs |
1,169,000
|
|
953,000
|
|
|
|
| Write off of unamortized deferred financing costs |
0
|
|
0
|
|
|
|
| Deferred leasing costs |
780,000
|
|
970,000
|
|
|
|
| Deferred tax asset |
23,400,000
|
|
|
|
|
|
| Income taxes, material adjustment amount |
$ 0
|
|
|
|
|
|
| Common stock, shares outstanding |
89,638,312
|
89,583,950
|
|
89,583,950
|
|
89,584,008
|
| Common units outstanding |
10,499,844
|
10,516,844
|
|
10,516,844
|
|
10,516,844
|
| LTIP units outstanding |
657,373
|
|
|
|
|
|
| Distributions payable, record date |
Apr. 05, 2016
|
|
|
Jan. 06, 2016
|
|
|
| Distributions payable, approved date |
Mar. 08, 2016
|
Dec. 08, 2015
|
|
|
|
|
| Common stock dividends and common unit distributions per share |
$ 0.15
|
$ 0.15
|
|
|
|
|
| Restricted stock expense |
$ 785,000
|
|
$ 313,000
|
|
|
|
| Distributions payable, pay date |
Apr. 15, 2016
|
Jan. 15, 2016
|
|
|
|
|
| Subsequent Event [Member] |
|
|
|
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
|
|
|
| Common stock, shares outstanding |
|
|
|
|
89,638,337
|
|
| Common units outstanding |
|
|
|
|
10,499,844
|
|
| LTIP units outstanding |
|
|
|
|
657,373
|
|