Summary of Significant Accounting Policies - Debt Issuance Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Other assets, net	$ 195,666	$ 186,416
Total assets	3,040,647	2,810,224
Notes and bonds payable	1,264,370	1,424,992
Total liabilities	1,387,233	1,567,477
Total liabilities and stockholders' equity	$ 3,040,647	2,810,224
As Previously Reported [Member]
Debt Instrument [Line Items]
Other assets, net		192,918
Total assets		2,816,726
Notes and bonds payable		1,431,494
Total liabilities		1,573,979
Total liabilities and stockholders' equity		$ 2,816,726