Income Taxes (Schedule Presents Net Current and Net Long-Term Deferred Tax Assets and Liabilities by Tax Jurisdiction) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Current	$ 0	$ 4,613
Deferred Tax Assets, Long-term	248	134
Deferred Tax Liabilities, Current	0	0
Deferred Tax Liabilities, Long-term	15,849	14,997
Federal
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Current	0	3,684
Deferred Tax Assets, Long-term	0	0
Deferred Tax Liabilities, Current	0	0
Deferred Tax Liabilities, Long-term	7,705	12,504
State
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Current	0	147
Deferred Tax Assets, Long-term	0	134
Deferred Tax Liabilities, Current	0	0
Deferred Tax Liabilities, Long-term	531	0
Foreign
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Current	0	782
Deferred Tax Assets, Long-term	248	0
Deferred Tax Liabilities, Current	0	0
Deferred Tax Liabilities, Long-term	$ 7,613	$ 2,493