Basis of Presentation (Details) $ / shares in Units, $ in Millions |
6 Months Ended | ||||||||
---|---|---|---|---|---|---|---|---|---|
Jun. 13, 2017
£ / shares
shares
|
Jun. 09, 2017
USD ($)
|
Jun. 30, 2017
USD ($)
property
$ / shares
|
Jun. 30, 2016
USD ($)
|
Dec. 31, 2017
$ / shares
|
Apr. 24, 2017
shares
|
Dec. 31, 2016
USD ($)
|
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Noncontrolling Interest [Line Items] | |||||||||
Assets | [1] | $ 8,284.3 | $ 7,659.1 | ||||||
Borrowings under line of credit | $ 400.0 | $ 100.0 | |||||||
Dividends payable (per share) | $ / shares | $ 0.17 | ||||||||
Forecast [Member] | |||||||||
Noncontrolling Interest [Line Items] | |||||||||
Dividends payable (per share) | $ / shares | $ 0.19 | ||||||||
Unsecured Debt [Member] | Revolving Credit Facility [Member] | KW Revolving Facility [Member] | |||||||||
Noncontrolling Interest [Line Items] | |||||||||
Borrowings under line of credit | $ 350.0 | $ 400.0 | |||||||
KWE [Member] | |||||||||
Noncontrolling Interest [Line Items] | |||||||||
Cash consideration (per share) | £ / shares | £ 2.50 | ||||||||
Properties, Loans and Servicing Platform in Europe [Member] | Europe [Member] | |||||||||
Noncontrolling Interest [Line Items] | |||||||||
Assets | $ 934.2 | ||||||||
KWE [Member] | |||||||||
Noncontrolling Interest [Line Items] | |||||||||
Ownership percentage by parent | 75.00% | 23.80% | 64.00% | 23.60% | |||||
Shares issued per outstanding share | shares | 0.3854 | 0.667 | |||||||
Cash consideration to shareholders (per share) | £ / shares | £ 3.00 | ||||||||
Ownership percentage by noncontrolling owners | 25.00% | 36.00% | |||||||
Escrow deposit | $ 18.0 | ||||||||
Properties, Loans and Servicing Platform in Europe [Member] | |||||||||
Noncontrolling Interest [Line Items] | |||||||||
Number of real estate investment properties in Europe | property | 17 | ||||||||
Properties, Loans and Servicing Platform in Europe [Member] | Europe [Member] | |||||||||
Noncontrolling Interest [Line Items] | |||||||||
Ownership percentage by parent | 65.00% | ||||||||
Equity in consolidated investments | $ 264.2 | ||||||||
Equity Securities [Member] | KWE [Member] | |||||||||
Noncontrolling Interest [Line Items] | |||||||||
Investment, gross cash basis | $ 492.6 | ||||||||
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