Fair Value Disclosures - Contingent Consideration Liability Change in Amount (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance	$ 903
Contingent Consideration from New Acquisition	454	842
Payment of Contingent Consideration
Adjustment of Contingent Consideration	(874)	34
Ending Balance	483	876
Javers Group [Member]
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance	903
Contingent Consideration from New Acquisition		842
Payment of Contingent Consideration
Adjustment of Contingent Consideration	(903)	34
Ending Balance		876
John T. Fretz Insurance Agency, Inc. [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent Consideration from New Acquisition	454
Adjustment of Contingent Consideration	29
Ending Balance	$ 483