Investment Securities Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Due within 1 year	$ 0
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value	0
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	5
Held-to-maturity Securities	131,780
Securities held to maturity, fair value	130,454	$ 0
Due after 1 but within 5 years	0
Due after 5 but within 10 years	8,061
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	7,964
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	0
Due after 10 years	4,957
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	4,845
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	13,018
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value	12,809
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Net Carrying Amount	118,762
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Fair Value	117,645
Residential Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	0
Held-to-maturity Securities	118,762
Securities held to maturity, fair value	$ 117,645