Other Liabilities - Accrued and other liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Accrued and other liabilities	$ 20,862	$ 8,916
Accrued compensation and related taxes
Accrued and other liabilities	3,901	5,471
Deferred compensation
Accrued and other liabilities	3,525	0
Deferred revenue
Accrued and other liabilities	4,297	1,308
Investment purchases not settled
Accrued and other liabilities	3,330	0
Insurance
Accrued and other liabilities	1,648	0
Professional services
Accrued and other liabilities	329	763
Accrued fuel and rig-related charges
Accrued and other liabilities	1,103	601
Tax-related
Accrued and other liabilities	2,024	238
Other
Accrued and other liabilities	$ 705	$ 535