9. Leases

The Company leases certain office furniture, computer equipment, and office space under operating and capital leases. Generally, the leases contain renewal terms at the option of the Company at rates reflecting market rates at the time of renewal. Minimum annual lease payments under noncancelable lease arrangements at December 31, 2015, are as follows:


	Capital		Operating
	Leases		Leases
Year ending December 31:
2016	$	5,174	$	3,214
2017		3,051		2,445
2018		789		1,310
2019		477		1,129
2020		40		654
Thereafter		—		41
Total minimum lease payments	$	9,531	$	8,793
Less amount representing interest		740
Present value of future minimum lease payments		8,791
Less current installments of obligations under capital leases		4,626
Long-term capital lease obligations	$	4,165

Total rent expense charged to operations under terms of these operating leases was $3.2 million, $3.4 million, and $3.3 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Amortization of the capital leases of $4.6 million, $2.3 million, and $1.9 million for the years ended December 31, 2015, 2014, and 2013, respectively, is included in depreciation and amortization expense on the consolidated statements of operations.