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Summary of Operations and Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012 Segment	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2011 Maximum [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2011 Minimum [Member]	Mar. 01, 2010 Ecole Insurance Company [Member]
Summary of Operations and Significant Accounting Policies (Textual) [Abstract]
Restricted capital	$ 9,726,000	$ 9,923,000						$ 6,100,000
Restricted marketable securities maturity period				2 years	2 years	180 days	180 days
Workers Compensation Coverage Per Occurrence				5,000,000		1,000,000
Summary of Operations and Significant Accounting Policies (Additional Textual) [Abstract]
Revenue from attributable to geographic area	79.00%	75.00%	69.00%
Operating and reporting segment	1
Revenue recognition PEO service contract minimum term	1 year
PEO Service Contract Cancellation and Termination Period	30 days
Likelihood Of Tax Benefit Being Realized Upon Settlement	50.00%
Impairment	0
Income taxes paid	3,300,000	4,700,000	1,800,000
Cash and cash equivalents exceeded federally insured limits Value	$ 44,600,000

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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