Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Operating leases – We lease offices, manufacturing plants, equipment, vehicles and warehouses under operating lease agreements expiring through December 2024. Rental expense amounted to approximately $10.4 million, $10.5 million and $10.1 million for the years ended December 31, 2017, 2016 and 2015, respectively.  We do not have purchase options related to the operating lease agreements. The table below sets forth the approximate amount for future minimum lease payments under non-cancelable operating leases at December 31, 2017:

2018	$	9,187
2019		7,662
2020		5,642
2021		3,931
2022		3,365
Thereafter		2,068
	$	31,855

Summary of Land Right Leases

In addition, we have the following land right leases.    None of the leases requires a rental payment.

Location	Term (years)	Expiration Date
Chengdu, China	50	2061
Shanghai, China	50	2056
Shandong, China	50	2058
Shanghai, China	50	2058
Yangzhou, China	50	2065