Acquisition - Initial Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Aug. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Fair value of assets acquired
Goodwill	$ 35,674	$ 35,176		$ 20,150	$ 20,923
Partsmaster
Cash paid and payable and liabilities assumed
Cash paid and payable			$ 34,523
Accounts payable and accrued expenses			4,086
Deferred compensation			2,938
Lease obligation			620
Cash paid and payable and liabilities assumed			42,167
Fair value of assets acquired
Goodwill			15,816
Inventories			7,797
Accounts receivable			7,706
Property, plant and equipment			2,121
Right of use asset			620
Other assets			371
Fair value of assets acquired			42,167
Partsmaster | Customer relationships
Fair value of assets acquired
Intangibles			4,961
Partsmaster | Trade names
Fair value of assets acquired
Intangibles			$ 2,775