Non-controlling Interests (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended
	Jan. 02, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest		6,389	$ 5,648
Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest		6,389	5,648	0	0
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, Ownership Percentage by Noncontrolling Owners		0.60%
Non-controlling interest of joint venture partner [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		5.00%
Stockholders' Equity Attributable to Noncontrolling Interest		1,500