Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis

Financial assets and financial liabilities measured at fair value on a recurring basis are as follows:

			Fair Value Measurements at Reporting Date Using
As of June 30, 2017	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale:
U.S. Treasury Notes	$	3,607	$	—	$	3,607	$	—
Obligations of U.S. government agencies	675,318			—	675,318			—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	1,222,937			—	1,222,937			—
Private mortgage-backed securities	108,485			—	108,485			—
Corporate securities	66,884			—	66,884
Other investments	2,963			—	2,963			—
Loans held for sale	30,383			—	30,383			—
Derivative assets:
Interest rate swap contracts	9,001			—	9,001			—
Interest rate lock commitments	1,301			—	1,301			—
Forward loan sale contracts	297			—	297			—
Derivative liabilities:
Interest rate swap contracts	9,797			—	9,797			—
Deferred compensation plan assets	11,598			—	11,598			—
Deferred compensation plan liabilities	11,598			—	11,598			—

			Fair Value Measurements at Reporting Date Using
As of December 31, 2016	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale:
U.S. Treasury notes	$	3,612	$	—	$	3,612	$	—
Obligations of U.S. government agencies	391,297			—	391,297			—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	1,213,701			—	1,213,701			—
Private mortgage-backed securities	116			—	116			—
Other investments	2,972			—	2,972			—
Loans held for sale	61,794			—	61,794			—
Derivative assets:
Interest rate swap contracts	1,332			—	1,332			—
Interest rate lock commitments	1,131			—	1,131			—
Forward loan sales contracts	286			—	286			—
Derivative liabilities
Interest rate swap contracts	1,314			—	1,314			—
Deferred compensation plan assets	10,627			—	10,627			—
Deferred compensation plan liabilities	10,627			—	10,627			—

Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Non-Recurring Basis

The following table presents information about the Company’s assets and liabilities measured at fair value on a non-recurring basis:

				Fair Value Measurements at Reporting Date Using
As of June 30, 2017	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Impaired loans	$	34,975	$	—	$	—	$	34,975
Other real estate owned	1,422			—		—	1,422
Long-lived assets to be disposed of by sale	356			—		—	356
				Fair Value Measurements at Reporting Date Using
As of December 31, 2016	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Impaired loans	$	39,344	$	—	$	—	$	39,344
Other real estate owned	2,110			—		—	2,110
Long-lived assets to be disposed of by sale	1,335			—		—	1,335

Fair Value Inputs, Assets, Quantitative Information

	Fair Value As of
	June 30, 2017		December 31, 2016		Valuation Technique	Unobservable Inputs	Range (Weighted Average)
Impaired loans	$	34,975	$	39,344	Appraisal	Appraisal adjustment	0%	-	66%	(31%)
Other real estate owned	1,422		2,110		Appraisal	Appraisal adjustment	8%	-	96%	(18%)
Long-lived assets to be disposed of by sale	356		1,335		Appraisal	Appraisal adjustment	0%	-	9%	(6%)

Fair Value, by Balance Sheet Grouping

					Fair Value Measurements at Reporting Date Using
As of June 30, 2017	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	$	919,775	$	919,775	$	919,775	$	—	$	—
Investment securities available-for-sale	2,080,194		2,080,194		—		2,080,194		—
Investment securities held-to-maturity	529,442		535,145		—		535,145		—
Accrued interest receivable	35,830		35,830		—		35,830		—
Mortgage servicing rights, net	23,715		34,580		—		34,580		—
Loans held for sale	30,383		30,383		—		30,383		—
Net loans held for investment	7,449,889		7,325,012		—		7,290,037		34,975
Derivative assets	10,599		10,599		—		10,599		—
Deferred compensation plan assets	11,598		11,598		—		11,598		—
Total financial assets	$	11,091,425	$	10,983,116	$	919,775	$	10,028,366	$	34,975
Financial liabilities:
Total deposits, excluding time deposits	$	8,817,211	$	8,817,211	$	8,817,211	$	—	$	—
Time deposits	1,202,789		1,195,454		—		1,195,454		—
Securities sold under repurchase agreements	579,772		579,772		—		579,772		—
Other borrowed funds	15,019		15,019		—		15,019		—
Accrued interest payable	8,917		8,917		—		8,917		—
Long-term debt	28,017		28,240		—		28,240		—
Subordinated debentures held by subsidiary    trusts	82,477		91,519		—		91,519		—
Derivative liabilities	9,797		9,797		—		9,797		—
Deferred compensation plan liabilities	11,598		11,598		—		11,598		—
Total financial liabilities	$	10,755,597	$	10,757,527	$	8,817,211	$	1,940,316	$	—

					Fair Value Measurements at Reporting Date Using
As of December 31, 2016	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	$	782,023	$	782,023	$	782,023	$	—	$	—
Investment securities available-for-sale	1,611,698		1,611,698		—		1,611,698		—
Investment securities held-to-maturity	512,770		513,273		—		513,273		—
Accrued interest receivable	29,852		29,852		—		29,852		—
Mortgage servicing rights, net	18,457		35,656		—		35,656		—
Loans held for sale	61,794		61,794		—		61,794
Net loans held for investment	5,340,536		5,248,127		—		5,208,783		39,344
Derivative assets	2,749		2,749		—		2,749		—
Deferred compensation plan assets	10,627		10,627		—		10,627		—
Total financial assets	$	8,370,506	$	8,295,799	$	782,023	$	7,474,432	$	39,344
Financial liabilities:
Total deposits, excluding time deposits	$	6,324,512	$	6,324,512	$	6,324,512	$	—	$	—
Time deposits	1,051,598		1,044,670		—		1,044,670		—
Securities sold under repurchase agreements	537,556		537,556		—		537,556		—
Other borrowed funds	6		6		—		6		—
Accrued interest payable	5,421		5,421		—		5,421		—
Long-term debt	27,970		27,477		—		27,477		—
Subordinated debentures held by subsidiary    trusts	82,477		73,554		—		73,554		—
Derivative liabilities	1,314		1,314		—		1,314		—
Deferred compensation plan liabilities	10,627		10,627		—		10,627		—
Total financial liabilities	$	8,041,481	$	8,025,137	$	6,324,512	$	1,700,625	$	—