Summary of Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred expenses, net	$ 33,360	$ 42,000
Mortgages and notes payable, net	738,047	872,643
Senior notes payable, net	494,362	493,526
Trust preferred securities, net	127,096	126,996
LCIF [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred expenses, net	5,070	8,459
Mortgages and notes payable, net	$ 169,212	431,599
Accounting Standards Update 2015-03 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred expenses, net		42,000
Mortgages and notes payable, net		872,643
Term loans payable, net		500,076
Senior notes payable, net		493,526
Convertible guaranteed notes payable, net		12,126
Trust preferred securities, net		126,996
Accounting Standards Update 2015-03 [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred expenses, net		63,832
Mortgages and notes payable, net		882,952
Term loans payable, net		505,000
Senior notes payable, net		497,947
Convertible guaranteed notes payable, net		12,180
Trust preferred securities, net		129,120
Accounting Standards Update 2015-03 [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred expenses, net		(21,832)
Mortgages and notes payable, net		(10,309)
Term loans payable, net		(4,924)
Senior notes payable, net		(4,421)
Convertible guaranteed notes payable, net		(54)
Trust preferred securities, net		(2,124)
Accounting Standards Update 2015-03 [Member] | LCIF [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred expenses, net		8,459
Mortgages and notes payable, net		431,599
Accounting Standards Update 2015-03 [Member] | LCIF [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred expenses, net		14,352
Mortgages and notes payable, net		437,492
Accounting Standards Update 2015-03 [Member] | LCIF [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred expenses, net		(5,893)
Mortgages and notes payable, net		$ (5,893)