Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

After-tax Changes in Accumulated Other Comprehensive Loss

The after-tax changes in accumulated other comprehensive loss are as follows:

	Foreign currency translation adjustment			Pension and post-retirement benefits plans			Accumulated other comprehensive loss
Ending balance, December 31, 2017	$	(17,172	)	$	(24,063	)	$	(41,235	)
Net current period change	1,470			—			1,470
Amortization of actuarial losses	—			(338		)	(338		)
Ending balance, March 31, 2018	$	(15,702	)	$	(24,401	)	$	(40,103	)

	Foreign currency translation adjustment			Pension and post-retirement benefit plans			Accumulated other comprehensive loss
Ending balance, December 31, 2016	$	(24,313	)	$	(24,532	)	$	(48,845	)
Net current period change	1,822			—			1,822
Amortization of actuarial losses	—			(740		)	(740		)
Ending balance, March 31, 2017	$	(22,491	)	$	(25,272	)	$	(47,763	)

Related Tax Effects Allocated to Each Component of Accumulated Other Comprehensive Loss

The related tax effects allocated to each component of other comprehensive income are as follows:

	Three Months Ended
	March 31, 2018
	Before Tax Amount			Tax Expense		After Tax Amount
Cumulative translation adjustment	1,470			—		1,470
Amortization of actuarial losses	$	(506	)	$	168	$	(338	)
Total other comprehensive income	$	964		$	168	$	1,132

	Three Months Ended
	March 31, 2017
	Before Tax Amount			Tax Expense		After Tax  Amount
Cumulative translation adjustment	1,822			—		1,822
Amortization of actuarial losses	$	(957	)	$	217	$	(740	)
Total other comprehensive loss	$	865		$	217	$	1,082