COMPONENTS OF RENTAL INCOME AND EXPENSE

The principal components of rental income are as follows (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Minimum rents
Retail	$	19,548	$	18,544	$	39,202	$	37,078
Office	24,140		23,213		47,446		46,335
Multifamily	11,721		10,249		23,207		17,484
Mixed-use	2,740		2,581		5,565		5,142
Cost reimbursement	8,491		8,128		16,833		16,016
Percentage rent	355		456		791		911
Hotel revenue	9,530		9,345		19,313		19,210
Other	367		409		736		789
Total rental income	$	76,892	$	72,925	$	153,093	$	142,965

Minimum rents include $(2.8) million and $(0.5) million for the three months ended June 30, 2018 and 2017, respectively, and $(3.5) million and $(0.3) million for the six months ended June 30, 2018 and 2017, respectively, to recognize minimum rents on a straight-line basis. In addition, net amortization of above and below market leases included in minimum rents were $0.7 million and $0.9 million for the three months ended June 30, 2018 and 2017, respectively, and $1.4 million and $1.7 million for the six months ended June 30, 2018 and 2017, respectively.

The principal components of rental expenses are as follows (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Rental operating	$	8,742	$	8,437	$	17,402	$	16,510
Hotel operating	5,995		5,746		12,027		12,297
Repairs and maintenance	3,389		2,984		6,390		5,515
Marketing	503		462		915		898
Rent	806		794		1,600		1,551
Hawaii excise tax	969		945		2,002		1,970
Management fees	478		473		966		959
Total rental expenses	$	20,882	$	19,841	$	41,302	$	39,700