Consolidated Statements Of Cash Flows (USD $)
| 9 Months Ended |
|---|
Sep. 30, 2011 | Sep. 30, 2010 |
|---|
| CASH FLOWS FROM OPERATING ACTIVITIES | | |
| Net income | $ 62,949,000 | $ 55,207,000 |
| Adjustments to reconcile net income to net cash provided by Operating activities: | | |
| Depreciation and amortization, including related intangible assets | 144,481,000 | 143,124,000 |
| Depreciation and amortization on discontinued operations | | 409,000 |
| Amortization of stock compensation | 2,393,000 | 2,173,000 |
| Amortization of deferred financing costs and debt discount | 1,752,000 | 2,021,000 |
| Equity in earnings of unconsolidated joint venture, net | (1,174,000) | (213,000) |
| Realized gains on disposition of rental property | | (4,447,000) |
| Distributions of cumulative earnings from unconsolidated joint ventures | 2,482,000 | 313,000 |
| Changes in operating assets and liabilities: | | |
| Increase in unbilled rents receivable, net | (4,927,000) | (5,034,000) |
| Increase in deferred charges and other assets, net | (31,238,000) | (22,964,000) |
| Decrease (increase) in accounts receivable, net | 3,779,000 | (6,602,000) |
| Increase in accounts payable, accrued expenses and other liabilities | 5,928,000 | 3,376,000 |
| Decrease in rents received in advance and security deposits | (5,653,000) | (4,980,000) |
| Decrease in accrued interest payable | (10,163,000) | (18,429,000) |
| Net cash provided by operating activities | 170,609,000 | 143,954,000 |
| CASH FLOWS FROM INVESTING ACTIVITIES | | |
| Additions to rental property and related intangibles | (65,230,000) | (47,175,000) |
| Investment in unconsolidated joint ventures | (334,000) | (833,000) |
| Distributions in excess of cumulative earnings from unconsolidated joint ventures | 1,280,000 | 438,000 |
| (Increase) decrease in restricted cash | (2,321,000) | 1,292,000 |
| Net cash used in investing activities | (66,605,000) | (46,278,000) |
| CASH FLOW FROM FINANCING ACTIVITIES | | |
| Borrowings from revolving credit facility | 219,000,000 | |
| Repayment of revolving credit facility | (420,000,000) | |
| Repayment of senior unsecured notes | | (150,000,000) |
| Proceeds from offering of common stock | 227,374,000 | |
| Repayment of mortgages, loans payable and other obligations | (6,382,000) | (6,032,000) |
| Payment of financing costs | (14,000) | (2,010,000) |
| Proceeds from stock options exercised | 3,048,000 | 1,473,000 |
| Payment of dividends and distributions | (133,027,000) | (126,354,000) |
| Net cash used in financing activities | (110,001,000) | (282,923,000) |
| Net decrease in cash and cash equivalents | (5,997,000) | (185,247,000) |
| Cash and cash equivalents, beginning of period | 21,851,000 | 291,059,000 |
| Cash and cash equivalents, end of period | $ 15,854,000 | $ 105,812,000 |