Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Cash and cash equivalents, Carrying Amount	$ 145,346	$ 253,172	$ 208,515	$ 294,335
Investment securities, Carrying Amount	373,145	375,696
Loans, net, Carrying Amount	673,980	647,420
Accrued interest receivable, Carrying Amount	5,556	6,647
Assets, Carrying Amount	1,198,027	1,282,935
Cash and cash equivalents, Fair Value	145,346	253,172
Investment securities, Fair Value	373,145	375,696
Loans, net, Fair Value	675,686	649,161
Accrued interest receivable, Fair Value	5,556	6,647
Assets, Fair Value	1,199,733	1,284,676
Deposits	605,845	646,484
Accounts and drafts payable	536,725	577,259
Accrued interest payable, Carrying Amount	46	35
Liabilities, Carrying Amount	1,142,616	1,223,778
Deposits, Fair Value	606,236	646,892
Accounts and drafts payable, Fair Value	536,725	577,259
Accrued interest payable, Fair Value	46	35
Liabilities, Fair Value	$ 1,143,007	$ 1,224,186