These updates were also made in the tables below. Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Owned Properties Rental revenues and other income $ 177,488 $ 203,903 $ 410,299 $ 429,104 Interest income 115 119 232 238 Total revenues from external customers 177,603 204,022 410,531 429,342 Operating expenses before depreciation, amortization, and ground/facility lease expense (85,749 ) (90,763 ) (178,223 ) (182,932 ) Ground/facility lease expense (2,639 ) (2,408 ) (5,848 ) (5,075 ) Interest expense, net (1) (3,057 ) (4,014 ) (6,103 ) (8,777 ) Operating income before depreciation and amortization $ 86,158 $ 106,837 $ 220,357 $ 232,558 Depreciation and amortization $ 63,511 $ 65,628 $ 126,754 $ 131,132 Capital expenditures $ 85,621 $ 129,833 $ 181,832 $ 245,352 On-Campus Participating Properties Rental revenues and other income $ 4,101 $ 6,396 $ 14,810 $ 17,844 Interest income 7 70 26 111 Total revenues from external customers 4,108 6,466 14,836 17,955 Operating expenses before depreciation, amortization, and ground/facility lease expense (3,208 ) (3,806 ) (6,574 ) (7,763 ) Ground/facility lease expense (254 ) (828 ) (1,114 ) (1,710 ) Interest expense, net (1) (1,173 ) (1,311 ) (2,315 ) (2,614 ) Operating (loss) income before depreciation and amortization $ (527 ) $ 521 $ 4,833 $ 5,868 Depreciation and amortization $ 2,045 $ 2,016 $ 4,082 $ 4,045 Capital expenditures $ 601 $ 537 $ 1,166 $ 767 Development Services Development and construction management fees $ 1,290 $ 3,607 $ 3,345 $ 6,778 Operating expenses (2,080 ) (1,985 ) (4,605 ) (4,285 ) Operating (loss) income before depreciation and amortization $ (790 ) $ 1,622 $ (1,260 ) $ 2,493 Property Management Services Property management fees from external customers $ 2,668 $ 3,465 $ 6,497 $ 5,776 Operating expenses (2,897 ) (2,528 ) (6,579 ) (4,414 ) Operating (loss) income before depreciation and amortization $ (229 ) $ 937 $ (82 ) $ 1,362 Reconciliations Total segment revenues and other income $ 185,669 $ 217,560 $ 435,209 $ 459,851 Unallocated interest income earned on investments and corporate cash 748 780 1,463 1,546 Total consolidated revenues, including interest income $ 186,417 $ 218,340 $ 436,672 $ 461,397 Segment income before depreciation and amortization $ 84,612 $ 109,917 $ 223,848 $ 242,281 Segment depreciation and amortization (65,556 ) (67,644 ) (130,836 ) (135,177 ) Corporate depreciation (885 ) (1,171 ) (1,774 ) (2,393 ) Net unallocated expenses relating to corporate interest and overhead (31,957 ) (29,078 ) (64,995 ) (56,622 ) (Loss) gain from disposition of real estate  (282 ) 48,525 (282 ) Amortization of deferred financing costs (1,255 ) (1,218 ) (2,542 ) (2,350 ) Provision for impairment    (3,201 ) Loss from early extinguishment of debt   (4,827 )  Income tax provision (381 ) (314 ) (760 ) (678 ) Net (loss) income $ (15,422 ) $ 10,210 $ 66,639 $ 41,578 (1) Net of capitalized interest and amortization of debt premiums and discounts.