Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2019

Statement of Comprehensive Income [Abstract]

Schedule of Comprehensive Income (Loss)

The following tables display the components of Other Comprehensive Income (Loss), after-tax, and the related tax effects (in thousands):

	December 31,
	2019									2018							2017
	Before-Tax Amount			Tax Expense (Benefit)			Net-of-Tax Amount			Before-Tax Amount		Tax Expense			Net-of-Tax Amount		Before-Tax Amount			Tax Expense			Net-of-Tax Amount
Foreign currency translation adjustment	$	(35	)	$	—		$	(35	)	$	270	$	—		$	270	$	(202	)	$	—		$	(202	)
Reclassification of net income (loss) on derivative instruments	614			(162		)	452			614		(116		)	498		613			(242		)	371
Postretirement medical liability adjustment	(175		)	44			(131		)	346		(133		)	213		1,257			(484		)	773
Other comprehensive income (loss)	$	404		$	(118	)	$	286		$	1,230	$	(249	)	$	981	$	1,668		$	(726	)	$	942

Accumulated Other Comprehensive Income [Table Text Block]

Balances by classification included within AOCL on the Consolidated Balance Sheets are as follows, net of tax (in thousands):

	December 31,
	2019			2018
Foreign currency translation	$	1,413		$	1,448
Derivative instruments designated as cash flow hedges	(11,181		)	(11,633		)
Postretirement medical plans	120			251
Accumulated other comprehensive loss	$	(9,648	)	$	(9,934	)

Schedule of Accumulated Comprehensive Income (Loss)

The following table displays the changes in AOCL by component, net of tax (in thousands):

		December 31, 2019
		Year Ended
	Affected Line Item in the Consolidated Statements of Income	Interest Rate Derivative Instruments Designated as Cash Flow Hedges			Postretirement Medical Plans			Foreign Currency Translation			Total
Beginning balance		$	(11,633	)	$	251		$	1,448		$	(9,934	)
Other comprehensive income before reclassifications		—			—			(35		)	(35		)
Amounts reclassified from AOCL	Interest Expense	452			—			—			452
Amounts reclassified from AOCL		—			(131		)	—			(131		)
Net current-period other comprehensive income (loss)		452			(131		)	(35		)	286
Ending Balance		$	(11,181	)	$	120		$	1,413		$	(9,648	)

		December 31, 2018
		Year Ended
	Affected Line Item in the Consolidated Statements of Income	Interest Rate Derivative Instruments Designated as Cash Flow Hedges			Postretirement Medical Plans		Foreign Currency Translation		Total
Beginning balance		$	(9,981	)	$	31	$	1,178	$	(8,772	)
Other comprehensive income before reclassifications		—			—		270		270
Amounts reclassified from AOCL	Interest Expense	498			—		—		498
Amounts reclassified from AOCL		—			213		—		213
Net current-period other comprehensive income		498			213		270		981
Reclassification of certain tax effects from AOCL		(2,150		)	7		—		(2,143		)
Ending Balance		$	(11,633	)	$	251	$	1,448	$	(9,934	)