Income Taxes - Schedule of Income Tax Expense as Percentage of Pre-Tax Earnings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income taxes at statutory rate (percent)	21.00%	35.00%	35.00%
Valuation allowance on foreign tax credits (percent)	(0.10%)	(12.00%)	(33.00%)
Valuation allowance on state net operating loss carryforwards (percent)	(0.10%)	(2.00%)	(19.00%)
Valuation Allowance – Other (percent)	(0.10%)	(3.00%)	0.00%
Goodwill impairment (percent)	(10.60%)	0.00%	0.00%
Change in tax rate on deferred items (percent)	0.70%	0.00%	18.00%
Tax reform – Impact of change in tax rate (percent)	0.00%	96.00%	0.00%
State income taxes, net of federal benefit (percent)	1.10%	3.00%	5.00%
Foreign income tax rate differential (percent)	3.70%
Other items - net (percent)	(0.10%)	(2.00%)	(4.00%)
Total (percent)	15.50%	115.00%	2.00%
Increase (decrease) in taxes resulting from:
Income taxes at statutory rate	$ (35,167)	$ (18,004)	$ (9,502)
Valuation allowance on foreign tax credits	229	6,145	8,991
Valuation allowance on state net operating loss carryforwards	107	868	5,028
Valuation Allowance - Other	88	1,353	0
Goodwill impairment	17,729	0	0
Change in tax rate on deferred items	(1,163)	0	(4,772)
Tax reform – Impact of change in tax rate	0	(49,219)	0
State income taxes, net of federal benefit	(1,774)	(1,386)	(1,384)
Foreign income tax rate differential	(6,245)
Other items - net	250	1,270	1,170
Total	$ (25,946)	$ (58,973)	$ (469)