Notes and Contracts Payable (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Schedule of Notes and Contracts Payable

	December 31,
	2015		2014
	(in thousands, except percentages)
4.60% senior unsecured notes due November 15, 2024, net of unamortized discount of $66 and $74 at December 31, 2015 and 2014, respectively, effective interest rate of 4.60%	$	299,934	$	299,926
4.30% senior unsecured notes due February 1, 2023, net of unamortized discount of $680 and $760 at December 31, 2015 and 2014, respectively, effective interest rate of 4.35%		249,320		249,240
Trust deed notes with maturities through 2023, collateralized by land and buildings with a net book value of $50,514 and $52,414 at December 31, 2015 and 2014, respectively, weighted-average interest rate of 5.34% and 5.39%, at December 31, 2015 and 2014, respectively		30,308		34,420
Other notes and contracts payable with maturities through 2032, weighted-average interest rate of 4.21% and 5.30% at December 31, 2015 and 2014, respectively		5,540		3,751
	$	585,102	$	587,337

Aggregate Annual Maturities of Notes and Contracts Payable

The aggregate annual maturities for notes and contracts payable for the next five years and thereafter, are as follows:

Year	Annual maturities
	(in thousands)
2016	$	5,018
2017		5,493
2018		4,582
2019		4,234
2020		3,871
Thereafter		561,904
	$	585,102