Transaction and Other Costs (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Transaction and Other Costs
Relocation of corporate headquarters		$ 10,900
Demolition Costs	$ 682	5,432
Integration and severance costs	3,694	5,252	$ 15,907
Completed, potential and pursued transaction expenses	294	651	9,008
Other	4,000	1,000	2,791
Transaction and other costs	$ 8,670	$ 23,235	$ 27,706

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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