LEASES

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

LEASES

LEASES

We lease certain warehouse, plant and office facilities as well as certain equipment under noncancelable operating and finance leases expiring at various dates through the year 2034. Most of the operating leases contain renewal options and certain leases include options to purchase the related asset during or at the end of the lease term.

Amortization expense related to finance leases is included in depreciation expense while rent expense related to operating leases is included within cost of sales and selling research & development and administrative expenses (“SG&A”).

The components of lease expense for the three and nine months ended September 30, 2020 and 2019 were as follows:​

​	Three Months Ended September 30,				Nine Months Ended September 30,
​	2020		2019		2020		2019
Operating lease cost	$	6,076	$	6,001	$	17,171	$	17,442
Finance lease cost:	​		​		​		​
Amortization of right-of-use assets	$	905	$	1,165	$	3,010	$	3,041
Interest on lease liabilities	$	356	$	344	$	1,073	$	984
Total finance lease cost	$	1,261	$	1,509	$	4,083	$	4,025
Short-term lease and variable lease costs	$	2,466	$	1,757	$	7,344	$	6,027

Supplemental cash flow information related to leases was as follows:

Nine Months Ended September 30,	2020		2019
Cash paid for amounts included in the measurement of lease liabilities:	​		​
Operating cash flows from operating leases	$	17,060	$	15,874
Operating cash flows from finance leases	1,089		877
Financing cash flows from finance leases	3,678		3,365
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	19,255	$	11,673
Finance leases	3,356		12,401

LEASES

LEASES

We lease certain warehouse, plant and office facilities as well as certain equipment under noncancelable operating and finance leases expiring at various dates through the year 2034. Most of the operating leases contain renewal options and certain leases include options to purchase the related asset during or at the end of the lease term.

Amortization expense related to finance leases is included in depreciation expense while rent expense related to operating leases is included within cost of sales and selling research & development and administrative expenses (“SG&A”).

The components of lease expense for the three and nine months ended September 30, 2020 and 2019 were as follows:​

​	Three Months Ended September 30,				Nine Months Ended September 30,
​	2020		2019		2020		2019
Operating lease cost	$	6,076	$	6,001	$	17,171	$	17,442
Finance lease cost:	​		​		​		​
Amortization of right-of-use assets	$	905	$	1,165	$	3,010	$	3,041
Interest on lease liabilities	$	356	$	344	$	1,073	$	984
Total finance lease cost	$	1,261	$	1,509	$	4,083	$	4,025
Short-term lease and variable lease costs	$	2,466	$	1,757	$	7,344	$	6,027

Supplemental cash flow information related to leases was as follows:

Nine Months Ended September 30,	2020		2019
Cash paid for amounts included in the measurement of lease liabilities:	​		​
Operating cash flows from operating leases	$	17,060	$	15,874
Operating cash flows from finance leases	1,089		877
Financing cash flows from finance leases	3,678		3,365
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	19,255	$	11,673
Finance leases	3,356		12,401