Transaction and Other Costs (Tables)

12 Months Ended

Dec. 31, 2020

Transaction and Other Costs

Schedule of transaction and other costs

	Year Ended December 31,
	2020		2019		2018
	(In thousands)
Relocation of corporate headquarters (1)	$	—	$	10,900	$	—
Demolition costs (2)		682		5,432		—
Integration and severance costs (3)		3,694		5,252		15,907
Completed, potential and pursued transaction expenses		294		651		9,008
Other (4)		4,000		1,000		2,791
Transaction and other costs	$	8,670	$	23,235	$	27,706

(1) In November 2019, we relocated our corporate headquarters. Upon the relocation of our corporate headquarters, we incurred an impairment loss on the right-of-use assets for leases related to our former corporate headquarters as well as other costs. See Note 18 for additional information.

(2) For the year ended December 31, 2020, related to 223 23^rd Street and 2250 Crystal Drive (formerly 2300 Crystal Drive). For the year ended December 31, 2019, related to 1900 Crystal Drive.

(3) For the year ended December 31, 2018, included transition services provided by our former parent.

(4) For the years ended December 31, 2020 and 2019, related to charitable commitments to the Washington Housing Conservancy, a non-profit that acquires and owns affordable workforce housing in the Washington D.C. metropolitan region. For the year ended December 31, 2018, related costs associated with the successful pursuit of Amazon's new headquarters at our properties in National Landing for the year ended December 31, 2018.