Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 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 March 31, 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	$	3,612	$	—	$	3,612	$	—
Obligations of U.S. government agencies	407,243			—	407,243			—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	1,243,663			—	1,243,663			—
Private mortgage-backed securities	106			—	106			—
Other investments	2,967			—	2,967			—
Loans held for sale	23,237			—	23,237			—
Derivative assets:
Interest rate swap contracts	1,311			—	1,311			—
Interest rate lock commitments	1,712			—	1,712			—
Derivative liabilities:
Interest rate swap contracts	1,283			—	1,283			—
Forward loan sale contracts	405			—	405			—
Deferred compensation plan assets	11,108			—	11,108			—
Deferred compensation plan liabilities	11,108			—	11,108			—

			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 March 31, 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	$	37,484	$	—	$	—	$	37,484
Other real estate owned	1,682			—		—	1,682
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
	March 31, 2017		December 31, 2016		Valuation Technique	Unobservable Inputs	Range (Weighted Average)
Impaired loans	$	37,484	$	39,344	Appraisal	Appraisal adjustment	0%	-	66%	(31%)
Other real estate owned	1,682		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 March 31, 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	$	807,952	$	807,952	$	807,952	$	—	$	—
Investment securities available-for-sale	1,657,591		1,657,591		—		1,657,591		—
Investment securities held-to-maturity	490,968		493,925		—		493,925		—
Accrued interest receivable	27,712		27,712		—		27,712		—
Mortgage servicing rights, net	19,454		36,151		—		36,151		—
Loans held for sale	23,237		23,237		—		23,237		—
Net loans held for investment	5,300,311		5,148,977		—		5,111,493		37,484
Derivative assets	3,023		3,023		—		3,023		—
Deferred compensation plan assets	11,108		11,108		—		11,108		—
Total financial assets	$	8,341,356	$	8,209,676	$	807,952	$	7,364,240	$	37,484
Financial liabilities:
Total deposits, excluding time deposits	$	6,299,343	$	6,299,343	$	6,299,343	$	—	$	—
Time deposits	1,000,836		992,746		—		992,746		—
Securities sold under repurchase agreements	587,570		587,570		—		587,570		—
Other borrowed funds	1		1		—		1		—
Accrued interest payable	4,831		4,831		—		4,831		—
Long-term debt	27,994		27,520		—		27,520		—
Subordinated debentures held by subsidiary    trusts	82,477		85,442		—		85,442		—
Derivative liabilities	1,688		1,688		—		1,688		—
Deferred compensation plan liabilities	11,108		11,108		—		11,108		—
Total financial liabilities	$	8,015,848	$	8,010,249	$	6,299,343	$	1,710,906	$	—

					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	$	—