Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2017

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.

	At June 30, 2017
	Carrying Amount		Level 1		Level 2		Level 3		Estimated Fair Value
	(dollars in thousands)
Assets:
Cash and cash equivalents	$	229,281	$	229,281	$	—	$	—	$	229,281
Interest-bearing time deposits with financial institutions	3,944		3,944		—		—		3,944
Investments held-to-maturity	7,750		—		7,703		—		7,703
Securities available-for-sale	703,083		—		703,083		—		703,083
Federal Reserve Bank and FHLB stock, at cost	56,612		N/A		N/A		N/A		N/A
Loans held for sale, net	6,840		—		7,665		—		7,665
Loans held for investment, net	4,858,611		—		—		4,843,801		4,843,801
Accrued interest receivable	20,607		20,607		—		—		20,607
Liabilities:
Deposit accounts	4,946,431		3,745,568		801,765		—		4,547,333
FHLB advances	346,202		—		346,985		—		346,985
Other borrowings	51,065		—		51,742		—		51,742
Subordinated debentures	79,800		—		81,280		—		81,280
Accrued interest payable	443		443		—		—		443

	At December 31, 2016
	Carrying Amount		Level 1		Level 2		Level 3		Estimated Fair Value
	(dollars in thousands)
Assets:
Cash and cash equivalents	$	156,857	$	156,857	$	—	$	—	$	156,857
Interest-bearing time deposits with financial institutions	3,944		3,944		—		—		3,944
Investments held-to-maturity	8,565		—		8,461				8,461
Securities available-for-sale	380,963		—		380,963		—		380,963
Federal Reserve Bank and FHLB stock, at cost	37,304		N/A		N/A		N/A		N/A
Loans held for sale, net	7,711		—		8,405		—		8,405
Loans held for investment, net	3,220,317		—		—		3,211,154		3,211,154
Accrued interest receivable	13,145		13,145		—		—		13,145
Liabilities:
Deposit accounts	3,145,581		2,330,579		573,467		—		2,904,046
FHLB advances	278,000		—		277,935		—		277,935
Other borrowings	49,971		—		50,905		—		50,905
Subordinated debentures	69,383		—		69,982		—		69,982
Accrued interest payable	263		263		—		—		263

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:

	June 30, 2017
	Fair Value Measurement Using
	Level 1		Level 2		Level 3		Securities at Fair Value
	(dollars in thousands)
Investment securities available-for-sale:
Agency	$	—	$	55,071	$	—	$	55,071
Corporate	—		54,349		—		54,349
Municipal bonds	—		252,078		—		252,078
Collateralized mortgage obligation: residential	—		46,321		—		46,321
Mortgage-backed securities: residential	—		295,264		—		295,264
Total securities available-for-sale	$	—	$	703,083	$	—	$	703,083

	December 31, 2016
	Fair Value Measurement Using
	Level 1		Level 2		Level 3		Securities at Fair Value
	(dollars in thousands)
Investment securities available-for-sale:
Corporate	$	—	$	37,642	$	—	$	37,642
Municipal bonds	—		118,803		—		118,803
Collateralized mortgage obligation: residential	—		31,388		—		31,388
Mortgage-backed securities: residential	—		193,130		—		193,130
Total securities available-for-sale	$	—	$	380,963	$	—	$	380,963