|
Consolidated Balance Sheets (Parentheticals) (USD $)
|
Mar. 31, 2015
|
Dec. 31, 2014
|
| Amortized Cost on Deferred Financing and Leasing Costs |
$ 173,076,000 |
$ 169,468,000 |
| Noncontrolling Interest Operating Partnership Common Units Outstanding |
3,539,075 |
3,553,566 |
| Common Stock, Par or Stated Value Per Share |
$ 0.001 |
$ 0.001 |
| Common Stock, Shares Authorized |
283,987,000 |
283,987,000 |
| Common Stock, Shares, Issued |
150,367,813 |
149,807,179 |
| Common Stock, Shares, Outstanding |
150,367,813 |
149,807,179 |
| Treasury Stock, Shares |
1,249,909 |
1,249,909 |
| Liberty Property Limited Partnership [Member] |
|
|
| Amortized Cost on Deferred Financing and Leasing Costs |
$ 173,076,000 |
$ 169,468,000 |
| Limited Partners' Capital Account, Units Outstanding |
3,539,075 |
3,553,566 |
| Common Stock, Shares, Outstanding |
149,117,904 |
148,557,270 |
| Treasury Stock, Shares |
1,249,909 |
1,249,909 |
| Series I 2 [Member] |
|
|
| Temporary Equity, Shares Outstanding |
301,483 |
301,483 |
| Series I 2 [Member] | Liberty Property Limited Partnership [Member] |
|
|
| Temporary Equity, Shares Outstanding |
301,483 |
301,483 |