Fair Value Disclosures - Contingent consideration liability change in amount (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 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	(892)
Ending Balance	465	842
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)
Ending Balance		842
John T. Fretz Insurance Agency, Inc. [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent Consideration from New Acquisition	454
Adjustment of Contingent Consideration	11
Ending Balance	$ 465