Period over which grantee's right to exercise award under business combination arrangement over the service period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

No definition available.

Business Combinations (Narrative) (Details) - Rouse Services LLC [Member] - USD ($)		3 Months Ended		6 Months Ended
	Dec. 08, 2020	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Jun. 30, 2020
Business Acquisition [Line Items]
Total purchase price	$ 251,724,000
Cash consideration paid, including cash placed in escrow	250,265,000
Total consideration	250,996,000
Cash consideration	249,537,000	$ 249,537,000
Cash consideration, placed in escrow	$ 2,169,000
Post-closing release from escrow		728,000
Increase in liabilities assumed			$ 603,000
Reduction in purchase price		728,000
Decrease in liabilities assumed		1,677,000
Decrease in goodwill		1,802,000
Escrow deposit		$ 1,169,000		$ 1,169,000
Common stock consideration (in shares)	312,193
Vesting period	3 years
Common stock consideration fair value	$ 1,459,000
Shares forfeited			55,510	55,510
Reversal of share based continuing employment costs			$ 98,000
Number of common shares expected to vest		256,683		256,683
Unrecognized share based continuing employment costs		$ 11,898,000		$ 11,898,000	$ 0
Acquisition-related costs for legal, advisory, integration and other professional fees		3,049,000
Acquisition related share based continuing employment costs		$ 2,678,000
Employment Costs [Member]
Business Acquisition [Line Items]
Common stock consideration fair value	$ 20,735,000