Loans and Allowance for Loan Losses - Summary of non acquired loans - (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loans and Allowance for Loan Losses
Deferred fees	$ 1,200	$ 2,100
Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	4,220,726	3,467,826	$ 2,865,216
Less allowance for loan losses	(34,090)	(34,539)	(34,331)	$ (44,378)
Loans, net	4,186,636	3,433,287
Commercial non-owner occupied real estate \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	889,756	697,811
Commercial non-owner occupied real estate \| Construction and land development \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	401,979	364,221	299,951
Less allowance for loan losses	(4,116)	(5,666)	(6,789)	(10,836)
Commercial non-owner occupied real estate \| Other commercial non-owner occupied real estate \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	487,777	333,590	291,171
Less allowance for loan losses	(3,568)	(3,154)	(3,677)	(4,921)
Consumer real estate \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	1,338,239	1,070,712
Consumer real estate \| Consumer owner occupied \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	1,018,984	786,778	548,170
Less allowance for loan losses	(7,212)	(6,866)	(6,069)	(6,568)
Consumer real estate \| Home equity loans \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	319,255	283,934	257,139
Less allowance for loan losses	(2,929)	(2,829)	(2,782)	(3,626)
Commercial owner occupied real estate \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	1,033,398	907,913	833,513
Less allowance for loan losses	(8,341)	(8,415)	(7,767)	(8,743)
Commercial and industrial \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	503,808	405,923	321,824
Less allowance for loan losses	(3,974)	(3,561)	(3,592)	(4,939)
Other income producing property \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	175,848	150,928	143,204
Less allowance for loan losses	(1,963)	(2,232)	(2,509)	(3,747)
Consumer \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	233,104	189,317	136,410
Less allowance for loan losses	(1,694)	(1,367)	(937)	(781)
Other Loans \| Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	46,573	45,222	33,834
Less allowance for loan losses	$ (293)	$ (449)	$ (209)	$ (217)

The amount of deferred fees, net of deferred costs as of the reporting period.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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