Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal income tax expense (benefit)	$ 33,023	$ 33,408	$ (27,815)
U.S. state income taxes, net of federal income tax benefit	1,614	786	(355)
U.S. domestic deductions and credits	(6,145)	(1,210)	(661)
Capital loss on sale of equity interest in Brand with no realizable tax benefit	0	0	16,106
Difference in effective tax rates on international earnings and remittances	5,399	675	2,006
Uncertain tax position contingencies and settlements	(1,180)	(1,517)	(1,886)
Changes in realization on beginning of the year deferred tax assets	(6,937)	2,758	1,978
Forward Loss Provisions in SBB Contract with no realizable tax benefits	0	0	15,768
Global Intangible Low-Taxed Income	400	0	0
U.S. non-deductible expenses	2,277	664	724
Income related to the Infrastructure Transaction	0	0	(644)
Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Amount	(15,409)	48,680	0
Cumulative effect of change in statutory tax rates/laws	0	(153)	(388)
Income from unconsolidated entities	0	0	2,098
Other, net	(143)	(288)	(294)
Total income tax expense	$ 12,899	$ 83,803	$ 6,637
Annual effective income tax rate	8.20%	87.80%	(8.40%)