Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value of Financial Instruments
Cost to assume off-balance sheet commitments and standby letters of credit as a percentage of notional amount	10.00%
Assets:
Securities available for sale	$ 256,089	$ 84,066
Federal Reserve Bank and FHLB stock, at cost	15,450	11,247
Other real estate owned	1,186	2,258	1,231
Accrued interest receivable	6,254	4,126
Liabilities:
FHLB advances	156,000	87,000
Off-balance sheet commitments and standby letters of credit
Notional Amount	337,181	131,450
Cost to Cede or Assume	33,718	13,145
Level 1
Assets:
Cash and cash equivalents	126,813	59,352
Federal Reserve Bank and FHLB stock, at cost	15,450	11,247
Accrued interest receivable	6,254	4,126
Liabilities:
Deposit accounts	991,630	548,101
FHLB advances	156,000	87,000
Accrued interest payable	166	142
Level 2
Assets:
Securities available for sale	256,089	83,114
Loans held for sale, net	3,147	3,681
Loans held for investment, net	1,227,889	1,046,853
Other real estate owned	1,186	2,258
Liabilities:
Deposit accounts	301,007	363,382
Other borrowings	49,058	31,267
Subordinated debentures	4,696	4,973
Off-balance sheet commitments and standby letters of credit
Cost to Cede or Assume	33,718	13,145
Level 3
Assets:
Securities available for sale		952
Loans held for investment, net	2,427	2,736
Carrying Amount
Assets:
Cash and cash equivalents	126,813	59,352
Securities available for sale	256,089	84,066
Federal Reserve Bank and FHLB stock, at cost	15,450	11,247
Loans held for sale, net	3,147	3,681
Loans held for investment, net	1,231,923	974,213
Other real estate owned	1,186	2,258
Accrued interest receivable	6,254	4,126
Liabilities:
Deposit accounts	1,306,286	904,768
FHLB advances	156,000	87,000
Other borrowings	48,091	28,500
Subordinated debentures	10,310	10,310
Accrued interest payable	166	142
Estimated Fair Value
Assets:
Cash and cash equivalents	126,813	59,352
Securities available for sale	256,089	84,066
Federal Reserve Bank and FHLB stock, at cost	15,450	11,247
Loans held for sale, net	3,147	3,681
Loans held for investment, net	1,230,316	1,049,589
Other real estate owned	1,186	2,258
Accrued interest receivable	6,254	4,126
Liabilities:
Deposit accounts	1,292,637	911,483
FHLB advances	156,000	87,000
Other borrowings	49,058	31,267
Subordinated debentures	4,696	4,973
Accrued interest payable	$ 166	$ 142