Fair Value Disclosures - Change in Contingent Consideration Liability (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance	$ 5,999	$ 5,577
Contingent Consideration from New Acquisition	0	0
Payment of Contingent Consideration	5,317	1,160
Adjustment of Contingent Consideration	(275)	796
Ending Balance	407	5,213
Sterner Insurance Associates Inc [Member]
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance	331	1,144
Contingent Consideration from New Acquisition	0	0
Payment of Contingent Consideration	0	0
Adjustment of Contingent Consideration	(303)	490
Ending Balance	28	1,634
Girard Partners [Member]
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance	5,668	4,241
Contingent Consideration from New Acquisition	0	0
Payment of Contingent Consideration	5,317	900
Adjustment of Contingent Consideration	28	238
Ending Balance	$ 379	3,579
John T. Fretz Insurance Agency [Member]
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance		192
Contingent Consideration from New Acquisition		0
Payment of Contingent Consideration		260
Adjustment of Contingent Consideration		68
Ending Balance		$ 0