Fair Value - Summary of Carrying Value and Fair Value of Company's Financial Instruments (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity		$ 203,525	$ 207,904
Loans, net		2,137,202	1,804,814
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	[1]	0	0
Loans, net		0	0
Deposit liabilities		0	0
Borrowings		0	0
Subordinated debt		0	0
Significant Other Observable Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	[1]	202,813	208,788
Loans, net		0	0
Deposit liabilities		0	0
Borrowings		51,788	52,735
Subordinated debt		52,785	53,861
Significant Unobservable Inputs Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	[1]	0	0
Loans, net		2,147,024	1,814,746
Deposit liabilities		2,843,800	2,417,355
Borrowings		0	0
Subordinated debt		0	0
Carrying Amount [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	[1]	203,525	207,904
Loans, net		2,129,691	1,794,405
Deposit liabilities		2,844,387	2,416,534
Borrowings		50,000	50,000
Subordinated debt		$ 69,961	$ 64,583

[1] See Note D for further detail of recurring fair value basis of individual investment categories.