Douglas Dynamics, Inc. Quarterly report pursuant to Section 13 or 15(d)

Changes in Accumulated Other Comprehensive Loss by Component - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Amounts reclassified from accumulated other comprehensive loss:
Interest expense, net	$ 2,167	$ 5,007	$ 9,514	$ 15,709
Tax expense (benefit)	1,204	3,234	1,943	(17,484)
Reclassification net of tax	$ (6,913)	$ (9,109)	(21,518)	104,715
Interest rate swap \| Amount reclassified from accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive loss:
Interest expense, net				2,277
Tax expense (benefit)				(592)
Reclassification net of tax				1,685
Other Postretirement Benefit Liability \| Amount reclassified from accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive loss:
Actuarial (gains) losses			(234)	(231)
Tax expense (benefit)			61	60
Reclassification net of tax			(173)	$ (171)
Unrealized Net Loss on Interest Rate Swap \| Interest rate swap
Amounts reclassified from accumulated other comprehensive loss:
Interest expense, net			3,182
Tax expense (benefit)			(827)
Reclassification net of tax			$ 2,355

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.