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Significant Accounting Policies - Deferred Leasing Commissions and Revenue Recognition (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) item shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares
Deferred Leasing Commissions |  |  |
Amortization expense of deferred leasing commissions | $ 7,100 | $ 10,700 | $ 9,600
Estimated annual amortization of deferred leasing commissions for the succeeding five years |  |  |
2023 | 7,254 |  |
2024 | 5,174 |  |
2025 | 4,313 |  |
2026 | 3,602 |  |
2027 | 3,206 |  |
2028 and thereafter | 12,160 |  |
Summary of rental revenue |  |  |
Income from leases | 107,990 | 148,705 | 180,899
Reimbursable expenses | 49,736 | 54,825 | 61,310
Straight line rent adjustments | 5,895 | 4,017 | 1,685
Amortization of favorable and unfavorable leases | 118 | 34 | 313
Total | $ 163,739 | $ 207,581 | $ 244,207
Segment Reporting |  |  |
Number of reporting segments | item | 1 |  |
Net Income Per Share |  |  |
Potential dilutive shares outstanding | shares | 0 | 0 | 0
Denominator used for calculating basic net income per share (in shares) | shares | 103,338,000 | 106,667,000 | 107,303,000
Denominator used for calculating diluted net income per share (in shares) | shares | 103,338,000 | 106,667,000 | 107,303,000
Derivative instruments |  |  |
Fair value hedges outstanding | $ 0 |  |
Rental |  |  |
Summary of rental revenue |  |  |
Total | $ 163,739 | $ 207,581 | $ 244,207

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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=123420820&loc=SL77919311-209978 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI https://asc.fasb.org/extlink&oid=126900988&loc=SL77927221-108306 + Details
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