Amount of net investment in sales-type lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919379-209981

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Amount of net investment in sales-type lease originated four years prior to current fiscal year.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447

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Amount of net investment in sales-type lease originated in current fiscal year.

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Amount of net investment in sales-type lease originated in fiscal year prior to current fiscal year.

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Amount of net investment in sales-type lease originated three years prior to current fiscal year.

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Amount of net investment in sales-type lease originated two years prior to current fiscal year.

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Current Expected Credit Losses - Amortized Cost Basis in Sales-Type Leases based on Payment Activity (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Sales Type Lease Net Investment In Lease Credit Quality Indicator [Line Items]
2020	$ 55
2019	192
2018	354
2017	128
2016	52
Net investment in sales-type leases	781	$ 1,600	$ 1,562
Payment Performance Performing [Member]
Sales Type Lease Net Investment In Lease Credit Quality Indicator [Line Items]
2020	55
2019	192
2018	354
2017	128
2016	52
Net investment in sales-type leases	$ 781