Acquisitions 2015 Acquisitions Table (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 98,737	$ 65,995	$ 69,400	$ 52,987
Restricted Cash and Cash Equivalents		22,093	18,778
Accounts and premiums receivable, net		44,700	57,056
Real estate, net		280,831	203,961
Goodwill		92,767	92,767
Other assets		112,843	104,500
Liabilities
Deferred revenue		56,716	63,081
Deferred tax liabilities, net		27,072	22,699
Other liabilities and accrued expenses		(106,449)	(95,160)
2015 Acquisitions
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	94,068
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	11,960
Business Combination, Contingent Consideration, Liability	2,200
Fair value of total consideration	108,228
Acquisition Costs	1,790
Assets
Cash and cash equivalents	13,934
Restricted Cash and Cash Equivalents	919
Loans Receivable Held-for-sale, Amount	59,308
Accounts and premiums receivable, net	2,369
Real estate, net	76,003
Goodwill	1,708
Intangible assets, net	10,240
Deferred Tax Assets, Net	150
Other assets	3,804
Liabilities
Business Combination, Fair Value of Debt Assumed	52,836
Deferred revenue	589
Other liabilities and accrued expenses	(6,782)
Specialty finance
Assets
Goodwill		2,913	2,913
Specialty finance | 2015 Acquisitions
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	10,281
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	11,960
Business Combination, Contingent Consideration, Liability	2,200
Fair value of total consideration	24,441
Acquisition Costs	223
Assets
Cash and cash equivalents	13,934
Restricted Cash and Cash Equivalents	919
Loans Receivable Held-for-sale, Amount	59,308
Accounts and premiums receivable, net	2,369
Goodwill	1,708
Intangible assets, net	1,440
Deferred Tax Assets, Net	150
Other assets	3,712
Liabilities
Business Combination, Fair Value of Debt Assumed	52,836
Other liabilities and accrued expenses	(6,263)
Total identifiable net assets assumed	24,441
Real estate
Assets
Goodwill		$ 0	$ 0
Real estate | 2015 Acquisitions
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	83,787
Fair value of total consideration	83,787
Acquisition Costs	1,567
Assets
Real estate, net	76,003
Intangible assets, net	8,800
Other assets	92
Liabilities
Deferred revenue	589
Other liabilities and accrued expenses	(519)
Total identifiable net assets assumed	$ 83,787