Stockholders' Equity (Details) (USD $)	0 Months Ended	12 Months Ended
	Nov. 15, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stockholders' Equity
Stock authorized to be issued (in shares)		120,000,000
Common stock authorized to be issued (in shares)		100,000,000	100,000,000
Preferred stock authorized to be issued (in shares)		20,000,000
Common stock, shares issued		21,387,152	21,202,673
Common stock, shares outstanding		21,387,152	21,202,673
Proceeds from exercise of stock options		$ 925,000	$ 1,564,000	$ 31,000
Common Operating Partnership units redeemed for common stock (in shares)	889,610
Reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital	13,800,000
Number of shares issued		4,600,000	4,600,000
Dividend rate on preferred stock (as a percent)		7.25%	7.25%
Net Proceeds from issuance of preferred stock			110,615,000
Liquidation preference on preferred stock (in dollars per share)		$ 25.00	$ 25.00
2010 Plan
Stockholders' Equity
Proceeds from exercise of stock options		900,000	1,600,000
Amount of shares of common stock issued under the plan		184,479	454,879	214,142
2010 Plan | Maximum
Stockholders' Equity
Proceeds from exercise of stock options				100,000
Series A Cumulative Redeemable Preferred Stock
Stockholders' Equity
Number of shares issued			4,600,000
Dividend rate on preferred stock (as a percent)			7.25%
Net Proceeds from issuance of preferred stock			$ 110,600,000
Cumulative dividends each year on preferred stock (in dollars per share)		$ 1.8125
Liquidation preference on preferred stock (in dollars per share)		$ 25.00
Redemption price of preferred stock (in dollars per share)		$ 25.00
Minimum number of quarters in which no payment of preferred stock dividends leads to entitlement of voting rights		6
Conversion ratio of preferred stock		1.944