The following table summarizes the carrying amounts of accounts receivable, net as of December 31, 2017 and 2016 (in thousands):



	2017			2016
Receivable from tenants	$	19,923		$	7,564
Receivable from non-tenants	3,932			497
Receivable from insurance proceeds	—			1,967
Receivable from Sullivan County Infrastructure Revenue Bonds	14,718			22,164
Straight-line rent receivable	62,605			67,618
Allowance for doubtful accounts	(7,485		)	(871		)
Total	$	93,693		$	98,939

In October 2017, the Company terminated nine leases with various subsidiaries of Children’s Learning Adventure USA, LLC (CLA), seven of which relate to completed construction and two of which relate to unimproved land. These subsidiaries of CLA continue to operate these properties (other than the two unimproved properties) as holdover tenants. In December 2017, these CLA subsidiaries (other than one of the CLA tenants for an unimproved land parcel) and other CLA subsidiaries that are tenants of the Company's remaining leases filed petitions in bankruptcy under Chapter 11 seeking the protections of the Bankruptcy Code.

The above total includes receivable from tenants of approximately $6.0 million from CLA, which were fully reserved in the allowance for doubtful accounts at December 31, 2017. Additionally, during the three months ended December 31, 2017, the Company wrote-off the full amount of straight-line rent receivables of approximately $9.0 million related to CLA to straight-line rental revenue classified in rental revenue in the accompanying consolidated statements of income.

At December 31, 2017, the Company had approximately $255.7 million related to CLA classified in rental properties, net, in the accompanying consolidated balance sheets at December 31, 2017. Additionally, the Company had approximately $11.2 million classified in land held for development and $14.5 million classified in property under development in the accompanying consolidated balance sheets at December 31, 2017. The Company reviewed these balances for impairment at December 31, 2017 and determined that the estimated undiscounted future cash flows exceeded the carrying value of these properties.