CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Parent	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interest
Balance at Dec. 31, 2013	$ 1,121,588	$ 704,236	$ 56	$ 665,301	$ 1,132	$ 37,747	$ 417,352
Balance (in Shares) at Dec. 31, 2013	55,643,068		55,643,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares)			27,000
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	0	648	0	648	0	0	(648)
Issuance of Common Shares, net of issuance costs (in Shares)			1,054,000
Issuance of Common Shares, net of issuance costs	27,404	27,404	1	27,403	0	0	0
Dividends declared	(13,740)	(13,017)	0	0	0	(13,017)	(723)
Vesting of employee Restricted Share and LTIP awards (in Shares)			16,000
Vesting of employee Restricted Share and LTIP awards	2,135	281	0	281	0	0	1,854
Noncontrolling interest distributions	(32,921)	0	0	0	0	0	(32,921)
Noncontrolling Interest, Increase from Contributions	8,712	0	0	0	0	0	8,712
Balance before adjustment towards comprehensive income (in Shares)			56,740,000
Balance before adjustment towards comprehensive income	1,113,178	719,552	57	693,633	1,132	24,730	393,626
Comprehensive (loss) income:
Net income	19,115	21,595	0	0	0	21,595	(2,480)
Unrealized loss on valuation of swap agreements	(2,329)	(2,376)	0	0	(2,376)	0	47
Reclassification of realized interest on swap agreements	837	837	0	0	837	0	0
Total comprehensive (loss) income	17,623	20,056	0	0	(1,539)	21,595	(2,433)
Balance at Mar. 31, 2014	$ 1,130,801	$ 739,608	$ 57	$ 693,633	$ (407)	$ 46,325	$ 391,193
Balance (in Shares) at Mar. 31, 2014	56,739,739		56,740,000