Other Long-Term Liabilities (Other Long-Term Liabilities) (Detail) - USD ($) $ in Thousands	Sep. 30, 2017		Dec. 31, 2016
Schedule of Other Liabilities [Line Items]
Accrued lease liability	$ 10,700		$ 10,700
Accrued Bonuses	4,255		1,995
Uncertain tax position	30,488		41,591
Dividends Payable	149		270
Liabilities, Other than Long-term Debt, Noncurrent	416		0
Total	$ 46,008	[1]	$ 54,556	[2]

[1] unaudited

[2] Note 1