Investments In Unconsolidated Entities (Summary Schedule Of Joint Ventures) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Investment in Joint Ventures with Limited recourse debt to Company	$ 37,063	$ 0
Investments in joint ventures with debt non-recourse to Company	3,567	33,436
Investments in other active joint ventures	22,327	18,011
Total investments in unconsolidated entities	62,957	51,447
Joint Venture Debt Total	59,500	4,605
Company proportionate share of joint venture debt:
Joint venture debt with limited recourse guaranties	28,157	0
Joint venture debt non-recourse to Company	700	1,349
Company's total proportionate share of joint venture debt	$ 28,857	$ 1,349