Debt Debt (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Debt [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Debt consists of the following (in thousands):

	December 31, 2013		December 31, 2012
Revolving credit facility - unsecured	$	167,000	$	64,000
Bank term loans - unsecured	370,000		120,000
Bank term loan - secured	—		19,250
Fannie Mae term loans - secured (including a premium of $1,756)	80,080		—
	$	617,080	$	203,250

Schedule of Interest Expense [Table Text Block]

The following table summarizes interest expense (in thousands):

	Year Ended December 31,
	2013		2012		2011
Interest expense	$	8,523	$	3,172	$	2,070
Amortization of loan costs	706		320		581
Change in fair value of interest rate swap agreement	—		—		1,197
Total interest expense	$	9,229	$	3,492	$	3,848

Schedule of Interest Rate Derivatives [Table Text Block]

December 31, 2013 (dollars in thousands):

Date Entered	Maturity Date	Fixed Rate	Rate Index	Notional Amount		Fair Value
May 2012	April 2019	3.29%	1-month LIBOR	$	40,000	$	544
June 2013	June 2020	3.86%	1-month LIBOR	$	80,000	$	431