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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Amounts reclassified from accumulated other comprehensive loss:
Interest expense, net	$ 4,271	$ 4,379	$ 12,610	$ 12,420
Tax expense (benefit)	3,113	1,148	10,949	6,802
Reclassification net of tax	$ (12,266)	$ (9,790)	(37,105)	(28,819)
Interest rate swap \| Amount reclassified from accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive loss:
Interest expense, net				334
Tax expense (benefit)				(87)
Reclassification net of tax				247
Other Postretirement Benefit Liability \| Amount reclassified from accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive loss:
Actuarial (gains) losses			(234)	(156)
Tax expense (benefit)			61	41
Reclassification net of tax			(173)	(115)
Pension Liability \| Amount reclassified from accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive loss:
Actuarial (gains) losses			447	528
Tax expense (benefit)			(117)	(137)
Reclassification net of tax			330	$ 391
Unrealized Net Loss on Interest Rate Swap \| Interest rate swap
Amounts reclassified from accumulated other comprehensive loss:
Interest expense, net			206
Tax expense (benefit)			(54)
Reclassification net of tax			$ 152