Notes Payable (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Components of Notes Payable

Notes payable consists of the following:

(in thousands)	December 31,
	2015		2014
Unsecured revolving lines of credit	$	221,441	$	202,478
4.03% Series A senior notes due in 2018		60,000		80,000
3.68% Series B senior notes due in 2021		40,000		40,000
3.84% Series C senior notes due in 2022		60,000		—
	$	381,441	$	322,478

Schedule of Future Minimum Payments under Unsecured Revolving Lines of Credit and 4.03% Senior Notes, 3.68% Senior Notes and 3.84% Senior Notes

As of December 31, 2015, the future minimum payments under the unsecured revolving lines of credit, 4.03% Series A senior notes due in 2018, 3.68% Series B senior notes due in 2021 and 3.84% Series C senior notes due in 2022 are as follows:

(in thousands)
Year Ended December 31,
2016	$	20,000
2017		241,441
2018		20,000
2019		—
2020		—
2021 and thereafter		100,000
	$	381,441

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,
	2015			2014
Maximum amount outstanding	$	295,588		$	208,894
Average amount outstanding	$	236,860		$	191,248
Weighted average interest rate, during the period		2.35	%		2.41	%
Prime interest rate, end of period		3.50	%		3.25	%