Future Commitments Pursuant to Senior Executive Employment Agreements, which Include Non-Compete Clauses, and Excluding any Discretionary Bonuses (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Commitments and Contingencies Disclosure [Line Items]
2012	$ 2,090
2013	1,560
2014	1,560
2015	515
2016	515
Thereafter	1,030
Total	7,270
Base Salary
Commitments and Contingencies Disclosure [Line Items]
2012	1,560
2013	1,560
2014	1,560
2015	515
2016	515
Thereafter	1,030
Total	6,740
Maximum Cash Bonus
Commitments and Contingencies Disclosure [Line Items]
2012	530
Total	$ 530