Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	PreferredStock/Units [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2014	$ 1,115,341	$ 351,250	$ 66	$ 764,025	$ 0
Balance, shares at Dec. 31, 2014	66,061,804
Net income attributable to controlling interests	22,614				22,614
Dividends declared on common stock	(27,457)			(11,654)	(15,803)
Dividends earned on preferred stock	(6,811)				(6,811)
Redemption of operating partnership units	598			598
Common stock repurchase	(31,912)		(1)	(31,911)
Common stock repurchase, shares	(1,002,610)
Redemption of operating partnership units, shares	18,000
Issuance of stock awards	1,761			1,761
Issuance of stock awards, shares	530,419
Retirement and forfeiture of stock awards	(7,489)			(7,489)
Retirement and forfeiture of stock awards, shares	(232,388)
Amortization of deferred compensation costs	3,623			3,623
Adjustments to redeemable noncontrolling interests – operating partnership	5,878			5,878
Balance at Mar. 31, 2015	$ 1,076,146	$ 351,250	$ 65	$ 724,831	$ 0
Balance, shares at Mar. 31, 2015	65,375,225