Loans Receivable and Other Lending Investments, net (Narrative) (Details) - USD ($)	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Loans Receivable Net of Deferred Income	$ 1,623,509,000		$ 1,288,662,000
Loans, Sold Loans Carrying Value	5,500,000	$ 30,800,000
Realized Investment Gains (Losses)	0	$ 19,100,000
Loans Receivable One
Loans Receivable Net of Deferred Income	$ 146,700,000

The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.3(a))

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 325

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6485959&loc=d3e22529-158502

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration