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Debt and Financing Arrangements - Classification of the Company Lease Obligations (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Operating Lease Obligations:
Other Current Liabilities (current portion)	$ 1,600
Other Noncurrent Liabilities (long-term portion)	3,500
Capital Lease Obligations:
Other Current Liabilities (current portion)	200
Other Noncurrent Liabilities (long-term portion)	200
Lease Obligations [Member]
Operating Lease Obligations:
Other Current Liabilities (current portion)	1,600	$ 1,500	$ 1,600
Other Noncurrent Liabilities (long-term portion)	3,500	3,700	4,000
Total Operating Lease Obligations	5,100	5,200	5,600
Capital Lease Obligations:
Other Current Liabilities (current portion)	200	200	200
Other Noncurrent Liabilities (long-term portion)	200	200	300
Total Capital Lease Obligations	353	400	500
Total Lease Obligations	$ 5,500	$ 5,600	$ 6,100

X

- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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