(8) Employee Benefits (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Contribution Plan, Employer Matching Contribution, Percent	100.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	4.00%
Participants in Employee Health Plan	1,050
Health Care Cap Per Person	$ 110,000
Insured Capped Maximum Exposure Health Care	3,600,000
Defined Contribution Plan, Cost Recognized	0.617	0.486
Policyholder Benefits and Claims Incurred, Health Care	3,600,000	3.2
Amortized Deferred Bonus Plan	367,000	254,000
Production Bonus Plan	684,000	910,000
Workers' Compensation Liability	0.875	1.3
Insured Maximum Exposure Per Employee	1
Aggragate Insurance Deductable for Employees	$ 4