Investment Securities, Available-for-sale Securities, Maturities (Details) $ in Thousands	Jun. 30, 2016 USD ($)
Amortized Cost [Abstract]
Due in one year or less	$ 1,407
Due in one year through five years	76,137
Due after five years through ten years	40,557
Due after ten years	9
Amortized Cost	616,023
Fair Value [Abstract]
Due in one year or less	1,408
Due in one year through five years	76,219
Due after five years through ten years	40,583
Due after ten years	9
Fair Value	620,471
Mortgage-Backed Securities and Collateralized Mortgage Obligations-Residential [Member]
Amortized Cost [Abstract]
Securities, amortized cost	400,527
Fair Value [Abstract]
Securities, fair value	404,138
Small Business Administration-Guaranteed Participation Securities [Member]
Amortized Cost [Abstract]
Securities, amortized cost	87,102
Fair Value [Abstract]
Securities, fair value	87,740
Mortgage-Backed Securities and Collateralized Mortgage Obligations-Commercial [Member]
Amortized Cost [Abstract]
Securities, amortized cost	10,284
Fair Value [Abstract]
Securities, fair value	$ 10,374