Rent and tenant receivables and other assets, net consisted of the following as of June 30, 2016 and December 31, 2015 (in thousands):



	June 30, 2016		December 31, 2015
Accounts receivable, net⁽¹⁾	$	46,533	$	44,798
Straight-line rent receivable	187,721		161,079
Deferred costs, net ⁽²⁾	23,374		26,110
Prepaid expenses	11,981		9,773
Leasehold improvements, property and equipment, net ⁽³⁾	17,551		18,180
Restricted escrow deposits	2,746		1,190
Deferred tax asset and tax receivable	28,284		25,287
Program development costs, net ⁽⁴⁾	12,115		12,855
Interest rate swap assets, at fair value	—		1,892
Other assets	2,819		2,473
Total	$	333,124	$	303,637

___________________________________


(1)	Allowance for doubtful accounts was $7.8 million and $6.6 million as of June 30, 2016 and December 31, 2015, respectively.

(2)

Amortization expense for deferred costs related to the revolving credit facility totaled $2.6 million and $5.2 million for the three and six months ended June 30, 2016, respectively, and $2.7 million and $5.5 million for the three and six months ended June 30, 2015, respectively. Accumulated amortization for deferred costs related to the revolving credit facility were $24.6 million and $19.4 million as of June 30, 2016 and December 31, 2015, respectively.

(3)

Amortization expense for leasehold improvements totaled $0.3 million and $0.6 million for the three and six months ended June 30, 2016, respectively, and $0.4 million and $0.7 million for the three and six months ended June 30, 2015, respectively. Accumulated amortization was $3.2 million and $2.6 million as of June 30, 2016 and December 31, 2015, respectively. Depreciation expense for property and equipment totaled $0.5 million for each of the three month periods ended June 30, 2016 and 2015 and $1.0 million for each of the six month periods ended June 30, 2016 and 2015, respectively. Accumulated depreciation was $4.7 million and $3.7 million as of June 30, 2016 and December 31, 2015, respectively.


(4)	As of June 30, 2016 and December 31, 2015, the Company had reserves of $43.9 million and $34.8 million, respectively, relating to the program development costs.