Fair Value Disclosures - Contingent Consideration Liability Change in Amount (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance	$ 501	$ 903
Contingent Consideration from New Acquisition	5,470	454
Payment of Contingent Consideration	310
Adjustment of Contingent Consideration liability	526	(892)
Ending Balance	6,187	465
Girard Partners [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent Consideration from New Acquisition	5,470
Adjustment of Contingent Consideration liability	384
Ending Balance	5,854
John T. Fretz Insurance Agency [Member]
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance	501
Contingent Consideration from New Acquisition		454
Payment of Contingent Consideration	310
Adjustment of Contingent Consideration liability	142	11
Ending Balance	333	465
Javers Group [Member]
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance		903
Adjustment of Contingent Consideration liability		$ (903)