We have operating leases primarily for office facilities, automobiles and information technology equipment. Office facilities account for approximately 96% of our total lease liability.

Balance sheet information related to the Company’s operating leases as of March 31, 2019 was as follows (in thousands):



	March 31, 2019
Operating lease ROU assets	$	145,574
Current portion of operating lease liabilities		28,647
Noncurrent portion of operating lease liabilities		138,373
Total operating lease liabilities	$	167,020

		March 31, 2019
Weighted-average remaining lease term		7.1 years
Weighted-average discount rate		4.1%

The components of lease expense and other lease information as of and during the three-month period ended March 31, 2019 are as follows (in thousands):

	March 31, 2019
Operating lease cost	$	9,242
Cash paid for amounts included in measurement of lease liabilities
Operating cash flows from operating leases	$	9,260

Our leases have remaining lease terms of 1 year to 11 years. These leases generally contain renewal options for periods ranging from two to five years. Because the Company is not reasonably certain to exercise these renewal options, the options are not considered in determining the lease term, and associated potential option payments are excluded from lease payments. Expenses associated with operating leases was $38 million, $38.4 million and $37 million for the years ended December 31, 2018, 2017 and 2016, respectively.

A number of businesses acquired by us are located in properties owned indirectly by and leased from persons employed by the Company, none of whom are members of our senior management. In the aggregate, we made lease payments to those related parties of approximately $0.6 million and $0.9 million for the three months ended March 31, 2019 and 2018, respectively.

The following table summarizes the maturity of our operating lease liabilities as of March 31, 2019 (in thousands):

	Operating Leases
2019	$	25,975
2020		30,588
2021		26,243
2022		20,423
2023		19,097
Thereafter		66,194
Total undiscounted lease payments		188,520
Less: imputed interest		(21,500	)
Total lease liabilities	$	167,020

The following table summarizes the maturity of our operating lease commitments as of December 31, 2018 (in thousands):

	Operating Leases
2019	$	34,256
2020		30,419
2021		26,172
2022		20,358
2023		18,981
Thereafter		65,854
Total future minimum rental commitments	$	196,040