Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of carrying amount and estimated fair value of financial instruments

The fair value estimates presented herein are based on pertinent information available to management as of the periods indicated, representing an exit price.

	At March 31, 2018
	Carrying Amount		Level 1		Level 2		Level 3		Estimated Fair Value
	(dollars in thousands)
Assets:
Cash and cash equivalents	$	128,996	$	128,996	$	—	$	—	$	128,996
Interest-bearing time deposits with financial institutions	3,693		3,693		—		—		3,693
Investments held-to-maturity	24,559		—		23,915		—		23,915
Investment securities available-for-sale	863,243		—		863,243		—		863,243
FHLB, FRB and other stock	82,115		N/A		N/A		N/A		N/A
Loans held for sale	29,034		—		31,255		—		31,255
Loans held for investment, net	6,241,841		—		—		6,254,567		6,254,567
Derivative asset	2,717		—		2,717		—		2,717
Accrued interest receivable	27,073		27,073		—		—		27,073
Liabilities:
Deposit accounts	6,192,273		5,074,330		1,109,351		—		6,183,681
FHLB advances	439,647		—		438,664		—		438,664
Other borrowings	43,876		—		43,991		—		43,991
Subordinated debentures	105,188		—		115,544		—		115,544
Derivative liability	2,717		—		2,717		—		2,717
Accrued interest payable	1,638		1,638		—		—		1,638

	At December 31, 2017
	Carrying Amount		Level 1		Level 2		Level 3		Estimated Fair Value
	(dollars in thousands)
Assets:
Cash and cash equivalents	$	200,064	$	200,064	$	—	$	—	$	200,064
Interest-bearing time deposits with financial institutions	3,693		3,693		—		—		3,693
Investments held-to-maturity	18,291		—		18,082		—		18,082
Investment securities available-for-sale	787,429		—		787,429		—		787,429
FHLB, FRB and other stock	65,881		N/A		N/A		N/A		N/A
Loans held for sale	23,426		—		23,524		—		23,524
Loans held for investment, net (1)	6,167,532		—		—		6,269,366		6,269,366
Derivative asset	1,135		—		1,135		—		$	1,135
Accrued interest receivable	27,053		27,053		—		—		27,053
Liabilities:
Deposit accounts	6,085,868		5,001,053		1,074,564		—		6,075,617
FHLB advances	490,148		—		489,823		—		489,823
Other borrowings	46,139		—		46,373		—		46,373
Subordinated debentures	105,123		—		115,159		—		115,159
Derivative liability	1,135		—		1,135		—		1,135
Accrued interest payable	2,131		2,131		—		—		2,131

(1) The estimated fair value of loans held for investment, net for December 31, 2017 is not based on an exit price assumption.

Schedule of Company's financial instruments measured at fair value on a recurring basis

The following fair value hierarchy table presents information about the Company’s financial instruments measured at fair value on a recurring basis at the dates indicated:

	March 31, 2018
	Fair Value Measurement Using
	Level 1		Level 2		Level 3		Securities at Fair Value
	(dollars in thousands)
Investment securities available-for-sale:
Agency	$	—	$	44,164	$	—	$	44,164
Corporate	—		104,406		—		104,406
Municipal bonds	—		223,657		—		223,657
Collateralized mortgage obligation	—		31,709		—		31,709
Mortgage-backed securities	—		459,307		—		459,307
Total securities available-for-sale	$	—	$	863,243	$	—	$	863,243

	December 31, 2017
	Fair Value Measurement Using
	Level 1		Level 2		Level 3		Securities at Fair Value
	(dollars in thousands)
Investment securities available-for-sale:
Agency	$	—	$	47,209	$	—	$	47,209
Corporate	—		79,546		—		79,546
Municipal bonds	—		232,128		—		232,128
Collateralized mortgage obligation	—		33,781		—		33,781
Mortgage-backed securities	—		394,765		—		394,765
Total securities available-for-sale	$	—	$	787,429	$	—	$	787,429