Non-controlling Interests (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 12, 2018	Jan. 02, 2013	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest			$ 31,337	$ 20,862
Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest			$ 31,337	$ 20,862	$ 7,116
Non-controlling interest in Operating Partnership [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Operating Partnership Units Issued		212,000
Operating Partnership LTIP Units Issued	17,383
Operating Partnership LTIP Units Redeemed			503,988
Operating Partnership LTIP Units Distributed			503,988
Operating Partnership Units			212,000	212,000
Noncontrolling Interest in Operating Partnerships			$ 13,900	$ 4,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			2.40%	0.70%
Operating Partnership LTIP Units			521,371
Non-controlling interest of joint venture partner [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest			$ 17,300	$ 16,700