Fair Value Disclosures - Narrative (Details)					3 Months Ended	6 Months Ended		12 Months Ended
	Jul. 01, 2014 USD ($)	Jan. 27, 2014 USD ($)	May. 01, 2013 USD ($)	May. 31, 2012 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2015 USD ($) loan borrowers	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Goodwill, period increase						$ 1,525,000	$ 5,470,000
Valuation adjustments for loans held for sale						0		$ 0
Carrying value of impaired loans held for investment						42,947,000		56,191,000
Valuation allowance of impaired loans held for investment						444,000		998,000
Mortgage Servicing Rights Carrying Amount Before Valuation Allowance						5,700,000		5,500,000
Mortgage Servicing Rights Valuation Allowance						0		0
Fair Value Measured on Recurring Basis [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a recurring basis						332,638,000		315,071,000
Level 3 [Member] | Fair Value Measured on Recurring Basis [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a recurring basis						0		0
Sterner Insurance Associates Inc [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Potential cash payments from contingent consideration, minimum	$ 0
Potential cash payments from contingent consideration, maximum	$ 5,700,000.0
Potential cash payments from contingent consideration, period of measurement (in years)	3 years
Potential cash payments from contingent consideration, end date	Jun. 30, 2017
Goodwill, period increase						1,525,000
Girard Partners [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Potential cash payments from contingent consideration, minimum		$ 0
Potential cash payments from contingent consideration, maximum		$ 13,800,000.0
Potential cash payments from contingent consideration, end date		Dec. 31, 2018
Goodwill, period increase						0	5,470,000
Remaining potential cash payments from contingent consideration, period of measurement (in years)		4 years
John T. Fretz Insurance Agency [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Potential cash payments from contingent consideration, minimum			$ 0
Potential cash payments from contingent consideration, maximum			$ 360,000
Potential cash payments from contingent consideration, end date			Apr. 30, 2016
Goodwill, period increase						0	$ 0
Remaining potential cash payments from contingent consideration, period of measurement (in years)			1 year
Javers Group [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Potential cash payments from contingent consideration, period of measurement (in years)				3 years
Potential cash payments from contingent consideration, end date				Jun. 30, 2015
Reduction of other noninterest expense					$ 959,000
Fair value of contingent consideration liability						0
Original potential cash payments from contingent consideration, minimum				$ 0
Original potential cash payments from contingent consideration, maximum				$ 1,700,000
Held for Investment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of impaired loans held for investment						$ 38,900,000
Real Estate-Construction [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Nonaccrual Loans Held for Sale, Number of Loans | loan						2
Nonaccrual Loans Held for Sale, Number of Borrowers | borrowers						1
Amount of Nonaccrual Loans Transferred to Loans Held for Sale						$ 4,000,000
Carrying value of impaired loans held for investment						863,000		5,931,000
Valuation allowance of impaired loans held for investment						$ 0		$ 0