Notes Payable (Table)

12 Months Ended

Dec. 31, 2012

Notes Payable [Abstract]

Components of notes payable

(in thousands)	December 31,
	2012		2011
Unsecured Revolving Lines of Credit	$	202,000	$	196,500
4.03% Senior Notes due in 2018		100,000		100,000
	$	302,000	$	296,500

Unsecured revolving lines of credit

(in thousands)
Year Ended December 31,
2013	$	—
2014		20,000
2015		20,000
2016		20,000
2017		222,000
Thereafter		20,000
		$302,000

Information relates to the lines of credit

(dollar amounts in thousands)	Year Ended December 31,
	2012			2011
Maximum amount outstanding	$	220,799		$	262,461
Average amount outstanding	$	206,514		$	206,227
Weighted average interest rate, during the period		2.51	%		2.22	%
Weighted average interest rate, end of period		1.71	%		1.79	%
Prime interest rate, end of period		3.25	%		3.25	%