Other Liabilities - Accrued and other liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Accrued and other liabilities	$ 10,942	$ 7,763
Accrued compensation and related taxes
Accrued and other liabilities	6,061	4,207
Deferred revenue
Accrued and other liabilities	941	857
Insurance
Accrued and other liabilities	1,520	310
Professional services
Accrued and other liabilities	287	608
Accrued fuel and rig-related charges
Accrued and other liabilities	1,163	889
Tax-related
Accrued and other liabilities	341	385
Other
Accrued and other liabilities	$ 629	$ 507