Non-controlling Interests (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 02, 2013	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest		$ 14,089	$ 7,116
Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest		$ 14,089	7,116	$ 8,850	$ 6,903
Non-controlling interest in Operating Partnership [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Operating Partnership Units Issued	212,000
Operating Partnership Units		212,000
Noncontrolling Interest in Operating Partnerships		$ 4,000	4,100
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		0.60%
Non-controlling interest of joint venture partner [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest		$ 9,900	$ 3,000