Notes Payable (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Components of Notes Payable

Notes payable consists of the following:

(in thousands)	December 31,
	2014		2013
Unsecured revolving lines of credit	$	202,478	$	190,003
4.03% senior notes due in 2018		80,000		100,000
3.68% senior notes due in 2021		40,000		—
	$	322,478	$	290,003

Schedule of Future Minimum Payments under Unsecured Revolving Lines of Credit and 4.03% Senior Notes and 3.68% Senior Notes

As of December 31, 2014, the future minimum payments under the unsecured revolving lines of credit, 4.03% senior notes due in 2018 and 3.68% senior notes due in 2021 are as follows:

(in thousands)
Year Ended December 31,
2015	$	20,000
2016		20,000
2017		222,478
2018		20,000
2019 and thereafter		40,000
	$	322,478

Schedule of Information Related to Lines of Credit

The following information relates to the lines of credit for each of the following periods:

(dollar amounts in thousands)	Year Ended December 31,
	2014			2013
Maximum amount outstanding	$	208,894		$	202,000
Average amount outstanding	$	191,248		$	187,644
Weighted average interest rate, during the period		2.41	%		2.45	%
Prime interest rate, end of period		3.25	%		3.25	%