Other Liabilities - Accrued and other liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accrued and other liabilities	$ 10,974	$ 8,916
Accrued compensation and related taxes
Accrued and other liabilities	3,751	5,471
Deferred compensation
Accrued and other liabilities	3,535	0
Deferred revenue
Accrued and other liabilities	450	1,308
Investment purchases not settled
Accrued and other liabilities	267	0
Insurance
Accrued and other liabilities	462	0
Professional services
Accrued and other liabilities	464	763
Accrued fuel and rig-related charges
Accrued and other liabilities	247	601
Tax-related
Accrued and other liabilities	1,012	238
Other
Accrued and other liabilities	$ 786	$ 535