Mortgage Loans Payable and Unsecured Credit Facilities (Effect of Derivative Financial Instruments on Consolidated Statements of Operations and Consolidated Statements of Equity) (Details) - USD ($) |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Designation/Cash Flow [Member] | Interest Rate Swap [Member] | |||
Derivative Instruments Gain Loss [Line Items] | |||
Net amount of gain recognized in other comprehensive (loss) income (effective portion) | $ 2,185,000 | $ 2,492,000 | $ 1,162,000 |
Continuing Operations [Member] | |||
Derivative Instruments Gain Loss [Line Items] | |||
Net amount of gain (loss) recognized in other comprehensive (loss) income reclassified into earnings (effective portion) | $ 667,000 | $ (2,345,000) | $ (3,739,000) |