FCB Financial 10-Q 4 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 01, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Trading Symbol	FCB
Entity Registrant Name	FCB FINANCIAL HOLDINGS, INC.
Entity Central Index Key	1,476,651
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		43,335,655
Class B Non-voting Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 62,578	$ 52,903
Interest-earning deposits in other banks	37,424	30,973
Investment securities:
Available for sale securities, at fair value	2,046,488	1,876,434
Federal Home Loan Bank and other bank stock, at cost	68,372	51,656
Total investment securities	2,114,860	1,928,090
Loans held for sale	24,145	20,220
Loans:
Loans	7,251,401	6,634,894
Allowance for loan losses	(41,334)	(37,897)
Loans, net	7,210,067	6,596,997
Premises and equipment, net	36,111	36,652
Other real estate owned	18,540	19,228
Goodwill	81,204	81,204
Core deposit intangible	4,179	4,691
Deferred tax assets, net	50,612	61,391
Bank-owned life insurance	198,250	198,438
Other assets	63,422	59,347
Total assets	9,901,392	9,090,134
Transaction accounts:
Noninterest-bearing	1,135,922	905,905
Interest-bearing	4,489,554	4,183,972
Total transaction accounts	5,625,476	5,089,877
Time deposits	2,069,714	2,215,794
Total deposits	7,695,190	7,305,671
Borrowings (including FHLB advances of $944,000 and $592,250, respectively)	1,019,494	751,103
Other liabilities	69,430	50,919
Total liabilities	8,784,114	8,107,693
Commitments and contingencies (Note 12)
Stockholders’ Equity:
Additional paid-in capital	916,360	875,314
Retained earnings	262,521	188,451
Accumulated other comprehensive income (loss)	15,724	(3,995)
Treasury stock, at cost; 2,694,489; 2,694,489 Class A and 192,132; 192,132 Class B common shares	(77,373)	(77,373)
Total stockholders’ equity	1,117,278	982,441
Total liabilities and stockholders’ equity	9,901,392	9,090,134
Class A Common Stock
Stockholders’ Equity:
Common stock	46	44
Class B Non-voting Common Stock
Stockholders’ Equity:
Common stock	0	0
New loans
Loans:
Loans	6,900,380	6,259,406
Allowance for loan losses	(37,619)
Acquired loans
Loans:
Loans	351,021	$ 375,488
Allowance for loan losses	$ (1,499)

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
FHLB advances	$ 944,000	$ 592,250
Class A Common Stock
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	45,902,907	43,663,586
Common stock, shares outstanding	43,208,418	40,969,097
Treasury stock, shares	2,694,489	2,694,489
Class B Non-voting Common Stock
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	192,132	380,606
Common stock, shares outstanding	0	197,950
Treasury stock, shares	192,132	192,132

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest income:
Interest and fees on loans	$ 71,516	$ 62,642	$ 138,105	$ 123,930
Interest and dividends on investment securities	18,921	14,470	37,482	28,844
Other interest income	136	96	208	162
Total interest income	90,573	77,208	175,795	152,936
Interest expense:
Interest on deposits	15,625	10,340	29,143	19,633
Interest on borrowings	3,061	1,938	5,095	3,931
Total interest expense	18,686	12,278	34,238	23,564
Net interest income	71,887	64,930	141,557	129,372
Provision for loan losses	2,115	1,976	3,758	3,416
Net interest income after provision for loan losses	69,772	62,954	137,799	125,956
Noninterest income:
Service charges and fees	902	842	1,817	1,648
Loan and other fees	3,048	2,248	5,543	4,262
Bank-owned life insurance income	1,414	1,286	2,828	2,571
Income from resolution of acquired assets	320	478	1,082	1,158
Gain (loss) on sales of other real estate owned	(23)	2,102	22	1,992
Gain (loss) on investment securities	255	324	1,032	270
Other noninterest income	2,957	942	6,536	1,755
Total noninterest income	8,873	8,222	18,860	13,656
Noninterest expense:
Salaries and employee benefits	21,486	19,614	41,983	38,259
Occupancy and equipment expenses	3,336	3,034	6,733	6,606
Loan and other real estate related expenses	1,188	2,235	2,415	4,055
Professional services	1,508	1,105	2,860	2,442
Data processing and network	3,090	2,796	6,055	5,659
Regulatory assessments and insurance	2,184	1,840	4,361	3,957
Amortization of intangibles	256	297	512	676
Marketing and promotions	947	1,108	2,293	2,165
Other operating expenses	1,257	1,946	3,124	3,456
Total noninterest expense	35,252	33,975	70,336	67,275
Income before income tax expense	43,393	37,201	86,323	72,337
Income tax expense	8,312	13,697	12,253	26,381
Net income	$ 35,081	$ 23,504	$ 74,070	$ 45,956
Earnings per share:
Basic (usd per share)	$ 0.82	$ 0.58	$ 1.76	$ 1.13
Diluted (usd per share)	$ 0.76	$ 0.55	$ 1.62	$ 1.07
Weighted average shares outstanding:
Basic (shares)	42,659,101	40,646,498	42,197,420	40,672,682
Diluted (shares)	46,042,552	42,997,811	45,856,494	42,935,862

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 35,081	$ 23,504	$ 74,070	$ 45,956
Other comprehensive income (loss):
Unrealized net holding gains (losses) on investment securities available for sale, net of taxes of $(5,781), $(8,360), $(12,500), and $(9,389) respectively	9,331	13,297	20,117	14,938
Reclassification adjustment for realized (gains) losses on investment securities available for sale included in net income, net of taxes of $215, $153, $247, and $428, respectively	(348)	(241)	(398)	(679)
Total other comprehensive income (loss)	8,983	13,056	19,719	14,259
Total comprehensive income	$ 44,064	$ 36,560	$ 93,789	$ 60,215

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Unrealized net holding gains (losses) on investment securities available for sale, Tax	$ (5,781)	$ (8,360)	$ (12,500)	$ (9,389)
Reclassification adjustment for realized (gains) losses on investment securities available for sale included in net income, Tax	$ 215	$ 153	$ 247	$ 428

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Additional Paid in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Class A	Class ACommon Stock	Class B	Class BCommon Stock
Beginning Balance at Dec. 31, 2015	$ 876,109	$ 850,609	$ 88,535	$ (53,635)	$ (9,443)		$ 39		$ 4
Beginning Balance, shares at Dec. 31, 2015							37,126,571		3,733,882
Net income	45,956		45,956
Exchange of B shares to A shares							$ 1		$ (1)
Exchange of B shares to A shares, shares							834,862		(834,862)
Stock-based compensation and warrant expense	2,238	2,238
Treasury stock purchases	(20,264)			(20,264)
Treasury stock purchases, shares							(617,550)
Stock issued in connection with equity awards and warrants	4,889	4,889
Exercise of stock options and warrants, shares							295,010
Other	(15)	(15)
Other comprehensive income (loss)	14,259				14,259
Ending Balance at Jun. 30, 2016	923,172	857,721	134,491	(73,899)	4,816		$ 40		$ 3
Ending Balance, shares at Jun. 30, 2016							37,638,893		2,899,020
Beginning Balance at Dec. 31, 2016	982,441	875,314	188,451	(77,373)	(3,995)		$ 44		$ 0
Beginning Balance, shares at Dec. 31, 2016						40,969,097	40,969,097	197,950	197,950
Net income	74,070		74,070
Exchange of B shares to A shares, shares							197,950		(197,950)
Stock-based compensation and warrant expense	3,756	3,756
Treasury stock purchases	0
Stock issued in connection with equity awards and warrants	37,322	37,320					$ 2
Exercise of stock options and warrants, shares							2,041,371
Other	(30)	(30)
Other comprehensive income (loss)	19,719				19,719
Ending Balance at Jun. 30, 2017	$ 1,117,278	$ 916,360	$ 262,521	$ (77,373)	$ 15,724		$ 46		$ 0
Ending Balance, shares at Jun. 30, 2017						43,208,418	43,208,418	0	0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows From Operating Activities:
Net income	$ 74,070	$ 45,956
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan losses	3,758	3,416
Amortization of intangible assets	512	676
Depreciation and amortization of premises and equipment	1,766	1,713
Amortization of discount on loans	(363)	(506)
Net amortization (accretion) of premium (discount) on investment securities	972	744
Net amortization (accretion) of premium (discount) on time deposits	0	(37)
Net amortization (accretion) on FHLB advances and other borrowings	(753)	(1,306)
Impairment of other real estate owned	383	886
(Gain) loss on investment securities	(1,032)	(270)
(Gain) loss on sale of loans	(2,026)	(816)
(Gain) loss on sale of other real estate owned	(22)	(1,992)
(Gain) loss on sale of premises and equipment	(1)	44
Deferred tax expense	0	0
Stock-based compensation	3,756	2,238
Increase in cash surrender value of BOLI	(2,828)	(2,571)
Net change in operating assets and liabilities:
Net change in loans held for sale	(2,865)	(2,033)
Net change in other assets	(813)	8,811
Net change in other liabilities	14,513	5,532
Net cash provided by (used in) operating activities	89,027	60,485
Cash Flows From Investing Activities:
Purchase of investment securities available for sale	(416,404)	(222,112)
Sales of investment securities available for sale	70,496	174,766
Paydown and maturities of investment securities available for sale	207,148	32,665
Purchase of FHLB and other bank stock	(80,536)	(52,477)
Sales of FHLB and other bank stock	63,820	60,397
Net change in loans	(776,805)	(677,978)
Purchase of loans	0	(192,195)
Proceeds from sale of loans	159,912	57,261
Proceeds from sale of other real estate owned	1,721	21,778
Purchase of premises and equipment	(1,238)	(2,744)
Proceeds from the sale of premises and equipment	14	2
Proceeds from life insurance	3,016	0
Net cash provided by (used in) investing activities	(768,856)	(800,637)
Cash Flows From Financing Activities:
Net change in deposits	389,519	1,037,065
Net change in FHLB advances	351,750	(215,250)
Net change in repurchase agreements	(82,606)	(9,868)
Repurchase of stock	0	(20,264)
Exercise of stock options	37,322	4,889
Other financing costs	(30)	(15)
Net cash provided by (used in) financing activities	695,955	796,557
Net Change in Cash and Cash Equivalents	16,126	56,405
Cash and Cash Equivalents at Beginning of Period	83,876	102,460
Cash and Cash Equivalents at End of Period	100,002
Supplemental Disclosures of Cash Flow Information:
Interest paid	34,044	23,057
Income taxes paid	525	28,642
Supplemental disclosure of noncash investing and financing activities:
Transfer of loans to other real estate owned	$ 1,394	$ 10,622

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES General The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all information and notes to the consolidated financial statements necessary for a complete presentation of financial position, results of operations, comprehensive income and cash flows in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) and should be read in conjunction with the audited consolidated financial statements and the notes thereto for FCB Financial Holdings, Inc. (the “Company”) previously filed with the SEC in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 . In the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair presentation, have been included. The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the full year or any other interim period. Nature of Operations The Company is a national bank holding company with one wholly-owned national bank subsidiary, Florida Community Bank, N.A. (“Florida Community Bank” or the “Bank”), headquartered in Weston, Florida, offering a comprehensive range of traditional banking products and services to individual and corporate customers through 46 banking centers located in Florida at June 30, 2017 . Principles of Consolidation The consolidated financial statements include the accounts of the Company, its wholly-owned subsidiary, the Bank, and the Bank’s subsidiaries, which consist of a group of real estate holding companies. Intercompany transactions and balances have been eliminated in consolidation. Use of Estimates The Company’s financial reporting and accounting policies conform to U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates subject to significant change include the allowance for loan losses, valuation of and accounting for acquired loans, the carrying value of OREO, the fair value of financial instruments, the valuation of goodwill and other intangible assets, acquisition-related fair value computations, stock-based compensation and deferred taxes. Recently Adopted Accounting Pronouncements In March 2016, the FASB issued ASU No. 2016-09, “Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” which simplifies several aspects of the accounting for employee share-based payment transactions including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. This ASU eliminates equity treatment for tax benefits or deficiencies that result from differences between the compensation cost recognized for GAAP purposes and the related tax deduction at settlement or expiration with such changes recognized in income tax expense and excludes excess tax benefits and tax deficiencies from the calculation of assumed proceeds for earnings per share purposes since such amounts are recognized in the income statement. In addition, this ASU simplifies the statements of cash flows by eliminating the bifurcation of excess tax benefits from operating activities to financing activities. The Company recognized approximately $6.7 million and $15.9 million for the three and six months ended June 30, 2017, respectively, of tax benefit in the consolidated statements of income during as a result of the adoption of this guidance that previously would have been recorded in additional paid in capital. The requirement to recognize excess tax benefits and tax deficiencies in the income statement was applied prospectively. This ASU became effective for the first quarter ended March 31, 2017. In March 2016, the FASB issued ASU No. 2016-06, “Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments” which clarifies the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under the amendments in this ASU is required to assess the embedded call (put) options solely in accordance with the four-stop decision sequence. This ASU became effective for the first quarter ended March 31, 2017. The adoption of this guidance did not have a material impact on the consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-07, “Investments-Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting” which eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments in this ASU require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. This ASU became effective for the first quarter ended March 31, 2017. The adoption of this guidance did not have a material impact on the consolidated financial statements. In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements – Going Concern (Subtopic 205-40)”. This update requires management to evaluate whether there are conditions and events that raise substantial doubt about an entity’s ability to continue as a going concern. The guidance is intended to incorporate into GAAP a requirement that management perform a going concern evaluation similar to the auditor’s evaluation required by standards issued by the Public Company Accounting Oversight Board (“PCAOB”) and American Institute of Certified Public Accountants (“AICPA”). This ASU became effective for the first quarter ended March 31, 2017. The adoption of this guidance did not have a material impact on the consolidated financial statements. Recently Issued Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, which will supersede the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific revenue recognition guidance throughout the Accounting Standards Codification. Under ASU No. 2014-09, revenue should be recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying the guidance, an entity should 1) identify the contract(s) with a customer, 2) identify the performance obligations in the contract, 3) determine the transaction price, 4) allocate the transaction price to the performance obligations in the contract, and 5) recognize revenue when the entity satisfies a performance obligation. For public entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. In August 2015, the FASB issued ASU No. 2015-14 delaying the effective date of ASU No. 2014-09. Public business entities, certain not-for-profit entities, and certain employee benefit plans should apply the guidance in ASU No. 2014-09 to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Because this guidance does not apply to revenue associated with financial instruments, including loans or securities, the new guidance is not expected to have a material impact on the components of income most closely associated with financial instruments, including securities gains/losses and interest income. The Company is currently evaluating this guidance to determine the impact on components of noninterest income. Although management has not completed its evaluation of the impact of adoption of this ASU on noninterest income, management does not expect the amount or timing of the recognition of such revenue to be materially impacted and does not expect adoption to have a material impact on the Company's consolidated financial position, results of operations or cash flows. The Company does not plan to early adopt this guidance and has not yet identified which transition method will be applied upon adoption. In January 2017, the FASB issued ASU No. 2017-04, "Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment." The amendments in this ASU modify the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. An entity no longer will determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2019 including any interim periods within that reporting period where goodwill impairment tests are performed. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows. In Februry 2017, the FASB issued ASU No. 2017-05, "Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20) : Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets." The FASB is issuing this ASU to clarify the scope of Subtopic 610-20, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets, and to add guidance for partial sales of nonfinancial assets. The amendments in this ASU will require all entities to account for the derecognition of a business or nonprofit activity in accordance with Topic 810. The amendments also eliminate several accounting differences between transactions involving assets and transactions involving businesses. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017. Public entities may apply the guidance earlier but only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The Company is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows. In March 2017, the FASB issued ASU No. 2017-08, "Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities." This ASU shortens the amortization period for certain purchased callable debt securities held at a premium. The amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. For public business entities, the amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. The Company is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows. In May 2017, the FASB issued ASU No. 2017-09, "Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting." This ASU provides clarity when applying the guidance in Topic 718, specifically relating to a modification of a share-based payment award. Entities should treat changes as modifications unless the fair value, vesting conditions, and classification of the modified awards are unchanged from the conditions immediately before the change. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. The Company is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The amortized cost, gross unrealized gains and losses and approximate fair values of securities available for sale are as follows: Amortized Cost Unrealized Fair Value June 30, 2017 Gains Losses (Dollars in thousands) Available for sale: U.S. Government agencies and sponsored enterprises obligations $ 14,470 $ 70 $ 196 $ 14,344 U.S. Government agencies and sponsored enterprises mortgage-backed securities 587,676 3,296 5,632 585,340 State and municipal obligations 27,693 134 767 27,060 Asset-backed securities 624,245 3,228 111 627,362 Corporate bonds and other debt securities 623,692 22,990 2,368 644,314 Preferred stock and other equity securities 143,244 5,061 237 148,068 Total available for sale $ 2,021,020 $ 34,779 $ 9,311 $ 2,046,488 Amortized Cost Unrealized Fair Value December 31, 2016 Gains Losses (Dollars in thousands) Available for sale: U.S. Government agencies and sponsored enterprises obligations $ 16,512 $ 76 $ 274 $ 16,314 U.S. Government agencies and sponsored enterprises mortgage-backed securities 566,377 1,760 9,691 558,446 State and municipal obligations 28,109 148 578 27,679 Asset-backed securities 574,521 3,852 550 577,823 Corporate bonds and other debt securities 560,191 4,490 5,387 559,294 Preferred stock and other equity securities 137,228 814 1,164 136,878 Total available for sale $ 1,882,938 $ 11,140 $ 17,644 $ 1,876,434 As part of the Company’s liquidity management strategy, the Company pledges loans and securities to secure borrowings from the Federal Home Loan Bank of Atlanta ("FHLB") and the Federal Reserve Bank of Atlanta ("FRB"). The Company also pledges securities to collateralize public deposits, repurchase agreements and interest rate swaps. The carrying value of all pledged securities totaled $743.3 million and $594.0 million at June 30, 2017 and December 31, 2016 , respectively. The amortized cost and estimated fair value of securities available for sale, by contractual maturity, are as follows: June 30, 2017 Amortized Cost Fair Value (Dollars in thousands) Available for sale: Due in one year or less $ — $ — Due after one year through five years 221,802 225,410 Due after five years through ten years 101,885 101,952 Due after ten years 327,698 344,012 U.S. Government agencies and sponsored enterprises obligations, mortgage-backed securities and asset-backed securities 1,226,391 1,227,046 Preferred stock and other equity securities 143,244 148,068 Total available for sale $ 2,021,020 $ 2,046,488 For purposes of the maturity table, U.S Government agencies and sponsored enterprises obligations, agency mortgage-backed securities and asset-backed securities, the principal of which are repaid periodically, are presented as a single amount. The expected lives of these securities will differ from contractual maturities because borrowers may have the right to prepay the underlying loans with or without prepayment penalties. The following tables present the estimated fair values and gross unrealized losses on investment securities available for sale, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position as of the periods presented: Less than 12 Months 12 Months or More Total June 30, 2017 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss (Dollars in thousands) Available for sale: U.S. Government agencies and sponsored enterprises obligations $ 9,959 $ 196 $ — $ — $ 9,959 $ 196 U.S. Government agencies and sponsored enterprises mortgage-backed securities 299,960 5,247 10,195 385 310,155 5,632 State and municipal obligations 24,883 767 — — 24,883 767 Asset-backed securities 60,493 111 — — 60,493 111 Corporate bonds and other debt securities 94,178 1,445 28,705 923 122,883 2,368 Preferred stock and other equity securities 40,909 237 — — 40,909 237 Total available for sale $ 530,382 $ 8,003 $ 38,900 $ 1,308 $ 569,282 $ 9,311 Less than 12 Months 12 Months or More Total December 31, 2016 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss (Dollars in thousands) Available for sale: U.S. Government agencies and sponsored enterprises obligations $ 11,577 $ 274 $ — $ — $ 11,577 $ 274 U.S. Government agencies and sponsored enterprises mortgage-backed securities 372,145 9,261 11,781 430 383,926 9,691 State and municipal obligations 25,490 578 — — 25,490 578 Asset-backed securities 11,309 21 34,855 529 46,164 550 Corporate bonds and other debt securities 179,925 3,042 77,934 2,345 257,859 5,387 Preferred stock and other equity securities 49,996 1,144 5,123 20 55,119 1,164 Total available for sale $ 650,442 $ 14,320 $ 129,693 $ 3,324 $ 780,135 $ 17,644 At June 30, 2017 , the Company’s security portfolio consisted of 372 securities, of which 121 securities were in an unrealized loss position. A total of 99 were in an unrealized loss position for less than 12 months . The unrealized losses for these securities resulted primarily from changes in interest rates and spreads. The Company monitors its investment securities for other-than-temporary-impairment ("OTTI"). Impairment is evaluated on an individual security basis considering numerous factors, and their relative significance. The Company has evaluated the nature of unrealized losses in the investment securities portfolio to determine if OTTI exists. The unrealized losses relate to changes in market interest rates and market conditions that do not represent credit-related impairments. Furthermore, the Company does not intend to sell nor is it more likely than not that it will be required to sell these investments before the recovery of their amortized cost basis. Management has completed an assessment of each security in an unrealized loss position for credit impairment and has determined that no individual security was other-than-temporarily impaired at June 30, 2017 . The following describes the basis under which the Company has evaluated OTTI: U.S. Government Agencies and Sponsored Enterprises Obligations and Agency Mortgage-Backed Securities (“MBS”): The unrealized losses associated with U.S. Government agencies and sponsored enterprises obligations and agency MBS are primarily driven by changes in interest rates. These securities have either an explicit or implicit U.S. government guarantee. Asset-Backed Securities and Corporate Bonds & Other Debt Securities: Securities were generally underwritten in accordance with the Company’s investment standards prior to the decision to purchase, without relying on a bond issuer’s guarantee in making the investment decision. These investments are investment grade and will continue to be monitored as part of the Company’s ongoing impairment analysis, but are expected to perform in accordance with their terms. Preferred Stock and Other Equity Securities: The unrealized losses associated with preferred stock and other equity securities in large U.S. financial institutions are primarily driven by changes in interest rates and spreads. These securities were generally underwritten in accordance with the Company’s investment standards prior to the decision to purchase. Gross realized gains and losses on the sale of securities available for sale are shown below. The cost of securities sold is based on the specific identification method. Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (Dollars in thousands) Gross realized gains $ 369 $ 321 $ 694 $ 1,209 Gross realized losses (1,206 ) (54 ) (1,206 ) (996 ) Net realized gains (losses) $ (837 ) $ 267 $ (512 ) $ 213

Loans, Net

Loans, Net	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Loans, Net	LOANS, NET The Company’s loan portfolio consists of New and Acquired loans. The Company classifies originated loans and purchased loans not acquired through business combinations as New loans. The Company classifies loans acquired through business combinations as Acquired loans. All acquired loans not specifically excluded under ASC 310-30 are accounted for under ASC 310-30. The remaining portfolio of acquired loans excluded under ASC 310-30 are accounted for under ASC 310-20 and are classified as Non-ASC 310-30 loans. The following tables summarize the Company’s loans by portfolio and segment as of the periods presented, net of deferred fees, costs, premiums and discounts: June 30, 2017 ASC 310-30 Loans Non-ASC 310-30 Loans New Loans (1) Total (Dollars in thousands) Real estate loans: Commercial real estate $ 120,781 $ 38,043 $ 1,811,977 $ 1,970,801 Owner-occupied commercial real estate — 18,266 856,050 874,316 1-4 single family residential 28,792 62,485 2,133,883 2,225,160 Construction, land and development 15,060 5,890 706,866 727,816 Home equity loans and lines of credit — 40,809 47,686 88,495 Total real estate loans $ 164,633 $ 165,493 $ 5,556,462 $ 5,886,588 Other loans: Commercial and industrial $ 13,612 $ 5,499 $ 1,339,591 $ 1,358,702 Consumer 1,478 306 4,327 6,111 Total other loans 15,090 5,805 1,343,918 1,364,813 Total loans held in portfolio $ 179,723 $ 171,298 $ 6,900,380 $ 7,251,401 Allowance for loan losses (41,334 ) Loans held in portfolio, net $ 7,210,067 December 31, 2016 ASC 310-30 Loans Non-ASC 310-30 Loans New Loans (1) Total (Dollars in thousands) Real estate loans: Commercial real estate $ 130,628 $ 38,786 $ 1,438,427 $ 1,607,841 Owner-occupied commercial real estate — 18,477 769,814 788,291 1-4 single family residential 31,476 66,854 2,012,856 2,111,186 Construction, land and development 17,657 6,338 651,253 675,248 Home equity loans and lines of credit — 42,295 49,819 92,114 Total real estate loans $ 179,761 $ 172,750 $ 4,922,169 $ 5,274,680 Other loans: Commercial and industrial $ 15,147 $ 5,815 $ 1,332,869 $ 1,353,831 Consumer 1,681 334 4,368 6,383 Total other loans 16,828 6,149 1,337,237 1,360,214 Total loans held in portfolio $ 196,589 $ 178,899 $ 6,259,406 $ 6,634,894 Allowance for loan losses (37,897 ) Loans held in portfolio, net $ 6,596,997 (1) Balance includes $(71) thousand and $3.2 million of net deferred fees, costs, and premium and discount as of June 30, 2017 and December 31, 2016 , respectively. At June 30, 2017 and December 31, 2016 , the unpaid principal balance of ASC 310-30 loans were $209.1 million and $231.5 million , respectively. At June 30, 2017 and December 31, 2016 , the Company had pledged loans as collateral for FHLB advances of $3.25 billion and $3.20 billion , respectively. The recorded investments of consumer mortgage loans secured by 1-4 family residential real estate properties for which formal foreclosure proceedings are in process as of June 30, 2017 totaled $3.0 million . The Company held $316.9 million and $433.0 million of syndicated national loans as of June 30, 2017 and December 31, 2016 . No loans were purchased during the three and six months ended June 30, 2017 or the three months ended June 30, 2016 . The Company purchased approximately $189.2 million of loans from third parties during the six months ended June 30, 2016 . During the three and six months ended June 30, 2017 , the Company sold approximately $55.1 million and $192.5 million , respectively, in loans to third parties. During the three and six months ended June 30, 2016 , the Company sold approximately $25.6 million and $61.8 million , respectively, in loans to third parties. The accretable discount on ASC 310-30 loans represents the amount by which the undiscounted expected cash flows on such loans exceed their carrying value. The change in expected cash flows for certain ASC 310-30 loan pools resulted in the reclassification of $(9.6) million and $(19.7) million between non-accretable and accretable discount during the six months ended June 30, 2017 and 2016 , respectively. Changes in accretable discount for ASC 310-30 loans for the six months ended June 30, 2017 and 2016 , were as follows: Six Months Ended June 30, 2017 2016 (Dollars in thousands) Balance at January 1, $ 60,990 $ 144,152 Accretion (2,853 ) (29,374 ) Reclassifications from (to) non-accretable difference (9,647 ) (19,706 ) Balance at June 30, $ 48,490 $ 95,072

Allowance for Loan Losses

Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Allowance for Loan Losses	ALLOWANCE FOR LOAN LOSSES The Company’s accounting method for loans and the corresponding allowance for loan losses (“ALL”) differs depending on whether the loans are New or Acquired. The Company assesses and monitors credit risk and portfolio performance using distinct methodologies for Acquired loans, both ASC 310-30 Loans and Non-ASC 310-30 Loans, and New loans. Within each of these portfolios, the Company further disaggregates the portfolios into the following segments: Commercial real estate, Owner-occupied commercial real estate, 1-4 single family residential, Construction, land and development, Home equity loans and lines of credit, Commercial and industrial and Consumer. The ALL reflects management’s estimate of probable credit losses inherent in each of the segments. The following tables present information related to the ALL for the periods presented: Commercial Real Estate Owner- Occupied Commercial Real Estate 1-4 Single Family Residential Construction, Land and Development Home Equity Loans and Lines of Credit Commercial and Industrial Consumer Total (Dollars in thousands) Balance at April 1, 2017 $ 9,964 $ 2,711 $ 7,913 $ 4,918 $ 726 $ 12,953 $ 246 $ 39,431 Provision (credit) for ASC 310-30 loans 770 — 29 (77 ) — (1,127 ) (2 ) (407 ) Provision (credit) for non-ASC 310-30 loans (13 ) 4 59 (6 ) 175 (4 ) — 215 Provision (credit) for New loans 1,443 571 843 (79 ) (17 ) (461 ) 7 2,307 Total provision 2,200 575 931 (162 ) 158 (1,592 ) 5 2,115 Charge-offs for ASC 310-30 loans (9 ) — (35 ) (43 ) — (15 ) — (102 ) Charge-offs for non-ASC 310-30 loans — — (60 ) — — — — (60 ) Charge-offs for New loans — — — — — (50 ) — (50 ) Total charge-offs (9 ) — (95 ) (43 ) — (65 ) — (212 ) Recoveries for ASC 310-30 loans — — — — — — — — Recoveries for non-ASC 310-30 loans — — — — — — — — Recoveries for New loans — — — — — — — — Total recoveries — — — — — — — — Ending ALL balance ASC 310-30 loans 1,678 — 25 185 — 168 160 2,216 Non-ASC 310-30 loans 331 65 242 38 451 366 6 1,499 New loans 10,146 3,221 8,482 4,490 433 10,762 85 37,619 Balance at June 30, 2017 $ 12,155 $ 3,286 $ 8,749 $ 4,713 $ 884 $ 11,296 $ 251 $ 41,334 Commercial Real Estate Owner- Occupied Commercial Real Estate 1-4 Single Family Residential Construction, Land and Development Home Equity Loans and Lines of Credit Commercial and Industrial Consumer Total (Dollars in thousands) Balance at April 1, 2016 $ 9,454 $ 2,281 $ 7,309 $ 3,415 $ 499 $ 8,580 $ 457 $ 31,995 Provision (credit) for ASC 310-30 loans 5 — — 1 — (20 ) (16 ) (30 ) Provision (credit) for non-ASC 310-30 loans (98 ) (64 ) (26 ) 1 (6 ) (2 ) — (195 ) Provision (credit) for New loans 736 35 125 287 122 908 (12 ) 2,201 Total provision 643 (29 ) 99 289 116 886 (28 ) 1,976 Charge-offs for ASC 310-30 loans (352 ) — — (3 ) — (1 ) (2 ) (358 ) Charge-offs for non-ASC 310-30 loans — — — — — — — — Charge-offs for New loans — — — — — — — — Total charge-offs (352 ) — — (3 ) — (1 ) (2 ) (358 ) Recoveries for ASC 310-30 loans — — 31 62 — — — 93 Recoveries for non-ASC 310-30 loans — — — — — — — — Recoveries for New loans — — — — — — — — Total recoveries — — 31 62 — — — 93 Ending ALL balance ASC 310-30 loans 2,114 — 58 348 — 366 384 3,270 Non-ASC 310-30 loans 935 340 282 37 273 55 4 1,926 New loans 6,696 1,912 7,099 3,378 342 9,044 39 28,510 Balance at June 30, 2016 $ 9,745 $ 2,252 $ 7,439 $ 3,763 $ 615 $ 9,465 $ 427 $ 33,706 Commercial Real Estate Owner- Occupied Commercial Real Estate 1-4 Single Family Residential Construction, Land and Development Home Equity Loans and Lines of Credit Commercial and Industrial Consumer Total (Dollars in thousands) Balance at January 1, 2017 $ 10,123 $ 2,597 $ 7,379 $ 4,677 $ 648 $ 12,245 $ 228 $ 37,897 Provision (credit) for ASC 310-30 loans (582 ) — 31 (11 ) — (80 ) (84 ) (726 ) Provision (credit) for non-ASC 310-30 loans (45 ) 4 1 (9 ) 215 (10 ) (29 ) 127 Provision (credit) for New loans 2,785 685 1,433 99 28 (680 ) 7 4,357 Total provision 2,158 689 1,465 79 243 (770 ) (106 ) 3,758 Charge-offs for ASC 310-30 loans (9 ) — (35 ) (43 ) — (29 ) — (116 ) Charge-offs for non-ASC 310-30 loans — — (60 ) — (7 ) — — (67 ) Charge-offs for New loans (131 ) — — — — (150 ) — (281 ) Total charge-offs (140 ) — (95 ) (43 ) (7 ) (179 ) — (464 ) Recoveries for ASC 310-30 loans 14 — — — — — 100 114 Recoveries for non-ASC 310-30 loans — — — — — — 29 29 Recoveries for New loans — — — — — — — — Total recoveries 14 — — — — — 129 143 Ending ALL balance ASC 310-30 loans 1,678 — 25 185 — 168 160 2,216 Non-ASC 310-30 loans 331 65 242 38 451 366 6 1,499 New loans 10,146 3,221 8,482 4,490 433 10,762 85 37,619 Balance at June 30, 2017 $ 12,155 $ 3,286 $ 8,749 $ 4,713 $ 884 $ 11,296 $ 251 $ 41,334 Commercial Real Estate Owner- Occupied Commercial Real Estate 1-4 Single Family Residential Construction, Land and Development Home Equity Loans and Lines of Credit Commercial and Industrial Consumer Total (Dollars in thousands) Balance at January 1, 2016 $ 8,450 $ 2,243 $ 6,425 $ 3,404 $ 483 $ 7,665 $ 456 $ 29,126 Provision (credit) for ASC 310-30 loans (193 ) — 1 (9 ) — (22 ) (20 ) (243 ) Provision (credit) for non-ASC 310-30 loans (953 ) (122 ) (50 ) 1 17 (5 ) 6 (1,106 ) Provision (credit) for New loans 1,228 132 1,032 338 150 1,892 (7 ) 4,765 Total provision 82 10 983 330 167 1,865 (21 ) 3,416 Charge-offs for ASC 310-30 loans (352 ) — — (33 ) — (76 ) (2 ) (463 ) Charge-offs for non-ASC 310-30 loans — (1 ) — — (35 ) — (6 ) (42 ) Charge-offs for New loans — — — — — — — — Total charge-offs (352 ) (1 ) — (33 ) (35 ) (76 ) (8 ) (505 ) Recoveries for ASC 310-30 loans 761 — 31 62 — 11 — 865 Recoveries for non-ASC 310-30 loans 804 — — — — — — 804 Recoveries for New loans — — — — — — — — Total recoveries 1,565 — 31 62 — 11 — 1,669 Ending ALL balance ASC 310-30 loans 2,114 — 58 348 — 366 384 3,270 Non-ASC 310-30 loans 935 340 282 37 273 55 4 1,926 New loans 6,696 1,912 7,099 3,378 342 9,044 39 28,510 Balance at June 30, 2016 $ 9,745 $ 2,252 $ 7,439 $ 3,763 $ 615 $ 9,465 $ 427 $ 33,706 Credit Quality Indicators In evaluating credit risk, the Company looks at multiple factors; however, management considers delinquency status to be the most meaningful indicator of the credit quality of 1-4 single family residential, home equity loans and lines of credit and consumer loans. Delinquency statistics are updated at least monthly. Internal risk ratings are considered the most meaningful indicator of credit quality for Non-ASC 310-30 and New commercial, construction, land and development and commercial real estate loans. Internal risk ratings are updated on a continuous basis. The following tables present an aging analysis of the recorded investment for delinquent loans by portfolio and segment (excluding loans accounted for under ASC 310-30): Accruing June 30, 2017 30 to 59 Days Past Due 60 to 89 Days Past Due 90 Days or More Past Due Non- Accrual Total (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ — $ — $ — $ — $ — Owner-occupied commercial real estate — — — — — 1-4 single family residential — 1,091 — 1,433 2,524 Construction, land and development — 16,200 — — 16,200 Home equity loans and lines of credit — — — 200 200 Total real estate loans — 17,291 — 1,633 18,924 Other loans: Commercial and industrial 2,342 — — — 2,342 Consumer — — — — — Total other loans 2,342 — — — 2,342 Total new loans $ 2,342 $ 17,291 $ — $ 1,633 $ 21,266 Acquired loans: Real estate loans: Commercial real estate $ — $ — $ — $ 4,258 $ 4,258 Owner-occupied commercial real estate 506 — — 403 909 1-4 single family residential — 244 — 2,370 2,614 Construction, land and development — — — — — Home equity loans and lines of credit 1,456 71 — 2,295 3,822 Total real estate loans 1,962 315 — 9,326 11,603 Other loans: Commercial and industrial — 122 — 325 447 Consumer — — — — — Total other loans — 122 — 325 447 Total acquired loans $ 1,962 $ 437 $ — $ 9,651 $ 12,050 Accruing December 31, 2016 30 to 59 Days Past Due 60 to 89 Days Past Due 90 Days or More Past Due Non- Accrual Total (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ — $ — $ — $ 581 $ 581 Owner-occupied commercial real estate — — — — — 1-4 single family residential 1,593 — — 1,821 3,414 Construction, land and development 449 — — — 449 Home equity loans and lines of credit 255 — — 243 498 Total real estate loans $ 2,297 $ — $ — $ 2,645 $ 4,942 Other loans: Commercial and industrial $ — $ — $ — $ — $ — Consumer — — — — — Total other loans — — — — — Total new loans $ 2,297 $ — $ — $ 2,645 $ 4,942 Acquired Loans: Real estate loans: Commercial real estate $ — $ — $ — $ 4,720 $ 4,720 Owner-occupied commercial real estate 93 — — 2,502 2,595 1-4 single family residential 207 — — 2,728 2,935 Construction, land and development — — — — — Home equity loans and lines of credit 520 42 — 2,557 3,119 Total real estate loans $ 820 $ 42 $ — $ 12,507 $ 13,369 Other loans: Commercial and industrial $ — $ 128 $ — $ 325 $ 453 Consumer — — — — — Total other loans — 128 — 325 453 Total acquired loans $ 820 $ 170 $ — $ 12,832 $ 13,822 Loans exhibiting potential credit weaknesses that deserve management’s close attention and that, if left uncorrected, may result in deterioration of the repayment capacity of the borrower, are categorized as special mention. Loans with well-defined credit weaknesses including payment defaults, declining collateral values, frequent overdrafts, operating losses, increasing balance sheet leverage, inadequate cash flow, project cost overruns, unreasonable construction delays, past due real estate taxes or exhausted interest reserves are assigned an internal risk rating of substandard. A loan with a weakness so severe that collection in full is highly questionable or improbable will be assigned an internal risk rating of doubtful. The following tables summarize the Company’s commercial Non-ASC 310-30 and New loans by key indicators of credit quality. Loans accounted for under ASC 310-30 are excluded from the following analysis because their related allowance is determined by loan pool performance: June 30, 2017 Pass Special Mention Substandard Doubtful (Dollars in thousands) New loans: Commercial real estate $ 1,809,790 $ — $ 2,187 $ — Owner-occupied commercial real estate 856,050 — — — Construction, land and development 706,866 — — — Commercial and industrial 1,339,591 — — — Total new loans $ 4,712,297 $ — $ 2,187 $ — Acquired loans: Commercial real estate $ 33,431 $ — $ 4,343 $ 269 Owner-occupied commercial real estate 18,174 — 92 — Construction, land and development 5,890 — — — Commercial and industrial 4,824 — 675 — Total acquired loans $ 62,319 $ — $ 5,110 $ 269 December 31, 2016 Pass Special Substandard Doubtful (Dollars in thousands) New loans: Commercial real estate $ 1,435,633 $ — $ 2,794 $ — Owner-occupied commercial real estate 769,640 174 — — Construction, land and development 651,253 — — — Commercial and industrial 1,332,869 — — — Total new loans $ 4,189,395 $ 174 $ 2,794 $ — Acquired loans: Commercial real estate $ 33,705 $ — $ 5,081 $ — Owner-occupied commercial real estate 18,388 — 89 — Construction, land and development 6,338 — — — Commercial and industrial 5,134 — 681 — Total acquired loans $ 63,565 $ — $ 5,851 $ — Internal risk ratings are a key factor in identifying loans to be individually evaluated for impairment and impact management’s estimates of loss factors used in determining the amount of the ALL. The following tables show the Company’s investment in loans disaggregated based on the method of evaluating impairment: Loans - Recorded Investment Allowance for Credit Loss June 30, 2017 Individually Evaluated for Impairment Collectively Evaluated for Impairment ASC 310- 30 Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment ASC 310- 30 Loans (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ — $ 1,811,977 $ — $ — $ 10,146 $ — Owner-occupied commercial real estate — 856,050 — — 3,221 — 1-4 single family residential 1,096 2,132,787 — — 8,482 — Construction, land and development — 706,866 — — 4,490 — Home equity loans and lines of credit 129 47,557 — 66 367 — Total real estate loans $ 1,225 $ 5,555,237 $ — $ 66 $ 26,706 $ — Other loans: Commercial and industrial $ — $ 1,339,591 $ — $ — $ 10,762 $ — Consumer — 4,327 — — 85 — Total other loans $ — $ 1,343,918 $ — $ — $ 10,847 $ — Acquired loans: Real estate loans: Commercial real estate $ 4,258 $ 33,785 $ 120,781 $ 150 $ 181 $ 1,678 Owner-occupied commercial real estate — 18,266 — — 65 — 1-4 single family residential 768 61,717 28,792 25 217 25 Construction, land and development — 5,890 15,060 — 38 185 Home equity loans and lines of credit 1,025 39,784 — 207 244 — Total real estate loans $ 6,051 $ 159,442 $ 164,633 $ 382 $ 745 $ 1,888 Other loans: Commercial and industrial $ 325 $ 5,174 $ 13,612 $ 325 $ 41 $ 168 Consumer — 306 1,478 — 6 160 Total other loans $ 325 $ 5,480 $ 15,090 $ 325 $ 47 $ 328 Loans - Recorded Investment Allowance for Credit Loss December 31, 2016 Individually Evaluated for Impairment Collectively Evaluated for Impairment ASC 310- 30 Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment ASC 310- 30 Loans (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ 581 $ 1,437,846 $ — $ 221 $ 7,271 $ — Owner-occupied commercial real estate — 769,814 — — 2,536 — 1-4 single family residential 524 2,012,332 — — 7,049 — Construction, land and development — 651,253 — — 4,391 — Home equity loans and lines of credit 66 49,753 — 66 339 — Total real estate loans $ 1,171 $ 4,920,998 $ — $ 287 $ 21,586 $ — Other loans: Commercial and industrial $ — $ 1,332,869 $ — $ — $ 11,592 $ — Consumer — 4,368 — — 78 — Total other loans $ — $ 1,337,237 $ — $ — $ 11,670 $ — Acquired Loans: Real estate loans: Commercial real estate $ 4,720 $ 34,066 $ 130,628 $ 175 $ 201 $ 2,255 Owner-occupied commercial real estate — 18,477 — — 61 — 1-4 single family residential 1,612 65,242 31,476 88 213 29 Construction, land and development — 6,338 17,657 — 47 239 Home equity loans and lines of credit 1,050 41,245 — — 243 — Total real estate loans $ 7,382 $ 165,368 $ 179,761 $ 263 $ 765 $ 2,523 Other loans: Commercial and industrial $ 325 $ 5,490 $ 15,147 $ 325 $ 51 $ 277 Consumer — 334 1,681 — 6 144 Total other loans $ 325 $ 5,824 $ 16,828 $ 325 $ 57 $ 421 The following tables set forth certain information regarding the Company’s impaired loans (excluding loans accounted for under ASC 310-30) that were evaluated for specific reserves: Impaired Loans - With Allowance Impaired Loans - With no Allowance June 30, 2017 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ — $ — $ — $ — $ — Owner-occupied commercial real estate — — — — — 1-4 single family residential — — — 1,096 1,096 Construction, land and development — — — — — Home equity loans and lines of credit 66 66 66 63 63 Total real estate loans $ 66 $ 66 $ 66 $ 1,159 $ 1,159 Other loans: Commercial and industrial $ — $ — $ — $ — $ — Consumer — — — — — Total other loans $ — $ — $ — $ — $ — Acquired loans: Real estate loans: Commercial real estate $ 605 $ 625 $ 150 $ 3,653 $ 4,991 Owner-occupied commercial real estate — — — — — 1-4 single family residential 502 512 25 267 267 Construction, land and development — — — — — Home equity loans and lines of credit 405 500 207 620 915 Total real estate loans $ 1,512 $ 1,637 $ 382 $ 4,540 $ 6,173 Other loans: Commercial and industrial $ 325 $ 325 $ 325 $ — $ — Consumer — — — — — Total other loans $ 325 $ 325 $ 325 $ — $ — Impaired Loans - With Allowance Impaired Loans - With no Allowance December 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ 581 $ 581 $ 221 $ — $ — Owner-occupied commercial real estate — — — — — 1-4 single family residential — — — 524 524 Construction, land and development — — — — — Home equity loans and lines of credit 66 66 66 — — Total real estate loans $ 647 $ 647 $ 287 $ 524 $ 524 Other loans: Commercial and industrial $ — $ — $ — $ — $ — Consumer — — — — — Total other loans $ — $ — $ — $ — $ — Acquired loans: Real estate loans: Commercial real estate $ 630 $ 650 $ 175 $ 4,090 $ 5,397 Owner-occupied commercial real estate — — — — — 1-4 single family residential 565 512 88 1,047 1,047 Construction, land and development — — — — — Home equity loans and lines of credit — — — 1,050 1,415 Total real estate loans $ 1,195 $ 1,162 $ 263 $ 6,187 $ 7,859 Other loans: Commercial and industrial $ 325 $ 325 $ 325 $ — $ — Consumer — — — — — Total other loans $ 325 $ 325 $ 325 $ — $ — The following table presents the average recorded investment and interest income recognized during the period subsequent to impairment on loans individually evaluated for impairment: Three Months Ended June 30, 2017 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) Impaired loans with no related allowance: Real estate loans: Commercial real estate $ 3,679 $ — $ 465 $ — Owner-occupied commercial real estate — — — — 1-4 single family residential 1,363 — 267 — Construction, land and development — — — — Home equity loans and lines of credit 686 — 907 — Total real estate loans $ 5,728 $ — $ 1,639 $ — Other loans: Commercial and industrial $ — $ — $ 877 $ — Consumer — — — — Total other loans $ — $ — $ 877 $ — Impaired loans with an allowance: Real estate loans: Commercial real estate $ 624 $ — $ 4,480 $ — Owner-occupied commercial real estate — — 2,156 — 1-4 single family residential 506 — — — Construction, land and development — — — — Home equity loans and lines of credit 471 — 38 — Total real estate loans $ 1,601 $ — $ 6,674 $ — Other loans: Commercial and industrial $ 325 $ — $ — $ — Consumer — — — — Total other loans $ 325 $ — $ — $ — Six Months Ended June 30, 2017 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) Impaired loans with no related allowance: Real estate loans: Commercial real estate $ 3,701 $ — $ 465 $ — Owner-occupied commercial real estate — — — — 1-4 single family residential 1,078 — 266 — Construction, land and development — — — — Home equity loans and lines of credit 860 — 909 — Total real estate loans $ 5,639 $ — $ 1,640 $ — Other loans: Commercial and industrial $ — $ — $ 877 $ — Consumer — — — — Total other loans $ — $ — $ 877 $ — Impaired loans with an allowance: Real estate loans: Commercial real estate $ 627 $ — $ 4,502 $ — Owner-occupied commercial real estate — — 2,186 — 1-4 single family residential 515 — — — Construction, land and development — — — — Home equity loans and lines of credit 270 — 20 — Total real estate loans $ 1,412 $ — $ 6,708 $ — Other loans: Commercial and industrial $ 350 $ — $ — $ — Consumer — — — — Total other loans $ 350 $ — $ — $ —

Goodwill and Intangibles

Goodwill and Intangibles	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	GOODWILL AND INTANGIBLES Goodwill and other intangible assets are summarized as follows: June 30, 2017 December 31, 2016 (Dollars in thousands) Goodwill $ 81,204 $ 81,204 Core deposit intangible 14,370 14,370 Less: Accumulated amortization (10,191 ) (9,679 ) Net core deposit intangible $ 4,179 $ 4,691 Amortization expense for core deposit intangibles for the six months ended June 30, 2017 and 2016 totaled $512 thousand and $676 thousand , respectively. The estimated amount of amortization expense for core deposit intangible assets to be recognized for the remainder of 2017 through 2021 is as follows: Remainder of 2017 2018 2019 2020 2021 (Dollars in thousands) Core deposit intangible $ 512 $ 1,023 $ 1,023 $ 491 $ 360

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	DERIVATIVES The Company is a party to interest rate derivatives that are not designated as hedging instruments. These derivatives are interest rate swaps that the Company enters into with customers to allow customers to convert variable rate loans to fixed rates. At the same time the interest rate swap is entered into with the customer, an offsetting interest rate swap is entered into with another financial institution. The changes in the fair value of the swaps offset each other, except for any differences in the credit risk of the counterparties, which is determined by considering the risk rating, probability of default and loss of given default of each counterparty. The Company recorded $1.9 million and $1.2 million of customer swap fees in noninterest income in the accompanying consolidated statement of income for the three months ended June 30, 2017 and 2016 , respectively, and $3.3 million and $2.5 million of customer swap fees in noninterest income in the accompanying consolidated statement of income for the six months ended June 30, 2017 and 2016 , respectively. No credit changes in counterparty credit were identified. There was no change in the fair value of derivative assets and derivative liabilities attributable to credit risk included in noninterest expense in the consolidated statements of income for the three and six months ended June 30, 2017 or 2016 . No derivative positions held by the Company as of June 30, 2017 were designated as hedging instruments under ASC 815-10. The following tables summarize the Company’s derivatives outstanding included in other assets and other liabilities in the accompanying consolidated balance sheets: June 30, 2017 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments under ASC 815-10 Interest rate contracts - pay floating, receive fixed $ 829,015 $ 18,044 $ 160,281 $ 2,355 Interest rate contracts - pay fixed, receive floating 160,281 — 829,015 15,689 Total derivatives $ 989,296 $ 18,044 $ 989,296 $ 18,044 December 31, 2016 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments under ASC 815-10 Interest rate contracts - pay floating, receive fixed $ 708,426 $ 15,268 $ 182,848 $ 2,908 Interest rate contracts - pay fixed, receive floating 182,848 — 708,426 12,360 Total derivatives $ 891,274 $ 15,268 $ 891,274 $ 15,268 The derivative transactions entered into with a financial institution are subject to an enforceable master netting arrangement. The following table summarizes the gross and net fair values of the Company’s derivatives outstanding with this counterparty included in other liabilities in the accompanying consolidated balance sheets: June 30, 2017 Gross amounts of recognized liabilities Gross amounts offset in the consolidated balance sheets Net amounts in the consolidated balance sheets (Dollars in thousands) Offsetting derivative liabilities: Counterparty A - Interest rate contracts $ 18,044 $ (2,355 ) $ 15,689 December 31, 2016 Gross amounts of recognized liabilities Gross amounts offset in the consolidated balance sheets Net amounts in the consolidated balance sheets (Dollars in thousands) Offsetting derivative liabilities: Counterparty A - Interest rate contracts $ 15,268 $ (2,908 ) $ 12,360 At June 30, 2017 , the Company has pledged investment securities available for sale with a carrying amount of $22.8 million as collateral for the interest rate swaps in a liability position. The amount of collateral required to be posted by the Company varies based on the settlement value of outstanding swaps. As of June 30, 2017 and December 31, 2016 , substantially all of the floating rate terms within the interest rate contracts held by the Company were indexed to 1-month LIBOR. The fair value of the derivative assets and liabilities are included in a table in Note 13 “Fair Value Measurements,” in the line items “Derivative assets” and “Derivative liabilities.”

Deposits

Deposits	6 Months Ended
	Jun. 30, 2017
Banking and Thrift [Abstract]
Deposits	DEPOSITS The following table sets forth the Company’s deposits by category: June 30, 2017 December 31, 2016 (Dollars in thousands) Noninterest-bearing demand deposits $ 1,135,922 $ 905,905 Interest-bearing demand deposits 1,117,280 1,004,452 Interest-bearing NOW accounts 401,845 398,823 Savings and money market accounts 2,970,429 2,780,697 Time deposits 2,069,714 2,215,794 Total deposits $ 7,695,190 $ 7,305,671 Time deposits $100,000 and greater $ 1,602,977 $ 1,675,162 Time deposits greater than $250,000 843,452 843,683 The aggregate amount of overdraft demand deposits reclassified to loans was $504 thousand at June 30, 2017 . The aggregate amount of maturities for time deposits for each of the five years as of June 30, 2017 totaled $1.33 billion , $693.2 million , $24.2 million , $16.5 million and $3.6 million , respectively. The Company holds brokered deposits through an insured deposit sweep program of $567.4 million and $693.9 million at June 30, 2017 and December 31, 2016 , respectively. The Company holds brokered certificates of deposit of $778 thousand and $1.2 million at June 30, 2017 and December 31, 2016 , respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Accumulated Other Comprehensive Income	ACCUMULATED OTHER COMPREHENSIVE INCOME Changes in AOCI for the periods indicated are summarized as follows: Three Months Ended June 30, 2017 2016 Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax (Dollars in thousands) Balance at beginning of period $ 10,919 $ (4,178 ) $ 6,741 $ (13,414 ) $ 5,174 $ (8,240 ) Unrealized gain (loss) on investment securities available for sale: Net unrealized holdings gain (loss) arising during the period 15,112 (5,781 ) 9,331 21,657 (8,360 ) 13,297 Amounts reclassified to (gain) loss on investment securities (563 ) 215 (348 ) (394 ) 153 (241 ) Balance at end of period $ 25,468 $ (9,744 ) $ 15,724 $ 7,849 $ (3,033 ) $ 4,816 Six Months Ended June 30, 2017 2016 Before Tax Net Before Tax Net (Dollars in thousands) Balance at beginning of period $ (6,504 ) $ 2,509 $ (3,995 ) $ (15,371 ) $ 5,928 $ (9,443 ) Unrealized gain (loss) on investment securities available for sale: Net unrealized holdings gain (loss) arising during the period 32,617 (12,500 ) 20,117 24,327 (9,389 ) 14,938 Amounts reclassified to (gain) loss on investment securities (645 ) 247 (398 ) (1,107 ) 428 (679 ) Balance at end of period $ 25,468 $ (9,744 ) $ 15,724 $ 7,849 $ (3,033 ) $ 4,816

Basic and Diluted Earnings Per

Basic and Diluted Earnings Per Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Share	BASIC AND DILUTED EARNINGS PER SHARE Basic earnings per share (“EPS”) is calculated by dividing net income available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted EPS reflect the effect of common stock equivalents, including stock options and unvested shares, calculated using the treasury stock method. Common stock equivalents are excluded from the computation of diluted EPS in periods in which the effect is anti-dilutive. The following table presents the computation of basic and diluted EPS: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (Dollars in thousands, except share and per share data) Net income available to common stockholders $ 35,081 $ 23,504 $ 74,070 $ 45,956 Weighted average number of common shares - basic 42,659,101 40,646,498 42,197,420 40,672,682 Effect of dilutive securities: Employee stock-based compensation awards 3,383,451 2,351,313 3,659,074 2,263,180 Weighted average number of common shares - diluted 46,042,552 42,997,811 45,856,494 42,935,862 Basic earnings per share $ 0.82 $ 0.58 $ 1.76 $ 1.13 Diluted earnings per share $ 0.76 $ 0.55 $ 1.62 $ 1.07 Weighted average number of anti-dilutive equity awards 20,000 13,774 14,973 70,797

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The Company uses an estimated annual effective tax rate method in computing its interim tax provision. This effective tax rate is based on forecasted annual pre-tax income, permanent tax differences and statutory tax rates. The effective tax rates for the three months ended June 30, 2017 and 2016 were 19.2% and 36.8% , respectively. The decrease in the effective tax rate for the second quarter of 2017 was due to the adoption of ASU No. 2016-09 relating to the treatment of excess tax benefits recognized at settlement for share-based payments which resulted in recording a $6.7 million tax benefit in the consolidated statement of income for the quarter ended June 30, 2017 that previously would have been recorded in additional paid in capital. This was partially offset by higher levels of pre-tax income, which is subject to the marginal tax rate and changes in permanent tax differences. The tax rate differs from the statutory rate due to the impact of tax benefits related to bank-owned life insurance, dividends received deductions and certain stock-based compensation awards. The effective tax rates for the six months ended June 30, 2017 and 2016 were 14.2% and 36.5% , respectively. The decrease in the effective tax rate for the six months ended June 30, 2017 was due to the adoption of ASU No. 2016-09 relating to the treatment of excess tax benefits recognized at settlement for share-based payments which resulted in recording a $15.9 million tax benefit in the consolidated statement of income that previously would have been recorded in additional paid in capital. This was partially offset by higher levels of pre-tax income, which is subject to the marginal tax rate and changes in permanent tax differences. The tax rate differs from the statutory rate due to the impact of tax benefits related to bank-owned life insurance, dividends received deductions and certain stock-based compensation awards.

Stock-Based Compensation and Ot

Stock-Based Compensation and Other Benefit Plans	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation and Other Benefit Plans	STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS 2009 Stock Option Plan Option grant activity for the period indicated is summarized as follows: 2009 Stock Option Plan Options Weighted Average Exercise Price Outstanding at January 1, 2017 3,107,235 $ 20.62 Granted — — Exercised (1,396,193 ) 20.48 Forfeited (11,411 ) 22.73 Expired (1,169 ) 22.97 Outstanding at June 30, 2017 1,698,462 $ 20.72 Exercisable at June 30, 2017 1,590,698 $ 20.58 Vested at June 30, 2017 1,590,698 $ 20.58 Vested and expected to vest at June 30, 2017 1,698,462 $ 20.72 The total unrecognized compensation cost of $225 thousand related to the 2009 Stock Option Plan for share awards outstanding at June 30, 2017 will be recognized over a weighted average remaining period of 0.27 years. 2013 Stock Incentive Plan Option grant activity for the period indicated is summarized as follows: 2013 Stock Incentive Plan Options Options Weighted Average Exercise Price Outstanding at January 1, 2017 2,164,258 $ 20.63 Granted — — Exercised (432,048 ) 20.17 Forfeited (2,501 ) 27.23 Expired — — Outstanding at June 30, 2017 1,729,709 $ 20.73 Exercisable at June 30, 2017 1,702,037 $ 20.62 Vested at June 30, 2017 1,702,037 $ 20.62 Vested and expected to vest at June 30, 2017 1,729,709 $ 20.73 The total unrecognized compensation cost of $185 thousand related to the 2013 Stock Incentive Plan for share awards outstanding at June 30, 2017 will be recognized over a weighted average remaining period of 0.75 years. 2016 Stock Incentive Plan Option grant activity for the period indicated is summarized as follows: 2016 Stock Incentive Plan Options Options Weighted Average Exercise Price Outstanding at January 1, 2017 827,500 $ 36.11 Granted 20,000 47.33 Exercised — — Forfeited (20,000 ) 36.11 Expired — — Outstanding at June 30, 2017 827,500 $ 36.38 Exercisable at June 30, 2017 — $ — Vested at June 30, 2017 — $ — Vested and expected to vest at June 30, 2017 827,500 $ 36.38 The total unrecognized compensation cost of $5.9 million related to the 2016 Stock Incentive Plan for share awards outstanding at June 30, 2017 will be recognized over a weighted average remaining period of 4.13 years . 2016 Incentive Plan - Restricted Stock Awards On March 28, 2017, the Compensation Committee granted 83,593 restricted shares (the "Award") of Class A Common Stock to certain Executives. The fair value of the Awards on the grant date was $4.0 million and will be recognized as compensation expense over the requisite vesting period ending December 31, 2019. The Company recognized $776 thousand of compensation expense during the six months ended June 30, 2017 . 2016 Incentive Plan - Restricted Stock Unit Awards On February 7, 2017, the Compensation Committee granted certain non-employee Directors of the Company a portion of their Directors' compensation for fiscal year 2017 in the form of restricted stock units (the "Directors' RSU Award"). Each RSU constitutes the right to receive from the Company on the date the RSU is settled, one share of Class A Common Stock of the Company. A total of 24,800 Directors' RSUs were granted with a grant date fair value of $1.1 million . Twenty-five percent ( 25% ) of the RSUs vested on each of March 30, 2017 and June 30, 2017, and an additional twenty-five percent ( 25% ) will vest on each of September 30, 2017, and December 31, 2017 provided the participant remains in a continuous service relationship with the Company through such applicable date. Compensation expense will be recognized on a straight-line basis over the requisite vesting period ending December 31, 2017. The Company recognized $560 thousand of compensation expense during the six months ended June 30, 2017 . On March 28, 2017, the Compensation Committee granted a target of 73,144 and a maximum of 91,430 restricted stock units (the "RSU Award") of Class A Common Stock to a certain Executive. The total target grant date fair value of the RSU Award was $3.5 million , up to a maximum of $4.4 million , and will be recognized on a straight-line basis as compensation expense over the requisite vesting period ending December 31, 2019. The Company recognized $330 thousand of compensation expense during the six months ended June 30, 2017 .

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES The Company issues off balance sheet financial instruments in connection with its lending activities and to meet the financing needs of its customers. These financial instruments include commitments to fund loans and lines of credit as well as commercial and standby letters of credit. These commitments expose the Company to varying degrees of credit and market risk which are essentially the same as those involved in extending loans to customers. The Company follows the same credit policies in making commitments as it does for instruments recorded on the Company’s consolidated balance sheet. Collateral is obtained based on management’s assessment of the customer’s credit risk. The Company’s exposure to credit loss is represented by the contractual amount of these commitments. The Company’s reserve for unfunded commitments totaled $901 thousand as of June 30, 2017 and $1.6 million as of December 31, 2016 . Fees collected on off balance sheet financial instruments represent the fair value of those commitments and are deferred and amortized over their term. Financial Instruments Commitments Unfunded commitments are as follows: June 30, 2017 December 31, 2016 (Dollars in thousands) Commitments to fund loans $ 745,499 $ 724,380 Unused lines of credit 468,433 410,068 Commercial and standby letters of credit 34,082 26,200 Total $ 1,248,014 $ 1,160,648 Commitments to fund loans: Commitments to fund loans are agreements to lend funds to customers as long as there is no violation of any condition established in the contract. To accommodate the financial needs of customers, the Company makes commitments under various terms to lend funds to consumers and businesses. Commitments to fund loans generally have fixed expiration dates or other termination clauses and may require payment of a fee. Many of these commitments are expected to expire without being funded and, therefore, the total commitment amounts do not necessarily represent future liquidity requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral required in connection with a commitment to fund is based on management’s credit evaluation of the counterparty. Unused lines of credit: Unfunded commitments under lines of credit include commercial, commercial real estate, home equity and consumer lines of credit to existing customers. Some of these commitments may mature without being fully funded. Commercial and standby letters of credit: Letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Letters of credit are primarily issued to support trade transactions or guarantee arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The Company generally holds collateral supporting those commitments if deemed necessary. Other Commitments and Contingencies Legal Proceedings The Company, from time to time, is involved as plaintiff or defendant in various legal actions arising in the normal course of business. While the ultimate outcome of any such proceedings cannot be predicted with certainty, it is the opinion of management, based upon advice of legal counsel, that no proceedings exist, either individually or in the aggregate, which, if determined adversely to the Company, would have a material effect on the Company’s consolidated balance sheet, results of operations or cash flows.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS When determining the fair value measurements for assets and liabilities and the related fair value hierarchy, the Company considers the principal or most advantageous market in which it would transact and the assumptions that market participants would use when pricing the asset or liability. When possible, the Company looks to active and observable markets to price identical assets or liabilities. When identical assets and liabilities are not traded in active markets, the Company looks to market observable data for similar assets and liabilities. It is the Company’s policy to maximize the use of observable inputs, minimize the use of unobservable inputs and use unobservable inputs to measure fair value to the extent that observable inputs are not available. The need to use unobservable inputs generally results from the lack of market liquidity, resulting in diminished observability of both actual trades and assumptions that would otherwise be available to value instruments, or the value of underlying collateral is not market observable. Although third party price indications may be available for an asset or liability, limited trading activity would make it difficult to support the observability of these quotations. Financial Instruments Carried at Fair Value on a Recurring Basis The following is a description of the valuation methodologies used for financial instruments measured at fair value on a recurring basis, as well as the general classification of each instrument under the valuation hierarchy. Investment Securities—Investment securities available for sale are carried at fair value on a recurring basis. When available, fair value is based on quoted prices for the identical security in an active market and as such, would be classified as Level 1. If quoted market prices are not available, fair values are estimated using quoted prices of securities with similar characteristics, discounted cash flows or matrix pricing models. Investment securities available for sale for which Level 1 valuations are not available are classified as Level 2 if the valuation incorporates primarily observable inputs. Level 2 securities include U.S. Government agencies and sponsored enterprises obligations and agency mortgage-backed securities; state and municipal obligations; asset-backed securities; and corporate debt and other securities. Pricing of these securities is generally spread driven. Observable inputs that may impact the valuation of these securities include benchmark yield curves, credit spreads, reported trades, dealer quotes, bids, issuer spreads, current rating, historical constant prepayment rates, historical voluntary prepayment rates, structural and waterfall features of individual securities, published collateral data, and for certain securities, historical constant default rates and default severities. Interest Rate Derivatives—Interest rate derivatives are reported at estimated fair value utilizing Level 2 inputs and are included in other assets and other liabilities and consist of interest rate swaps where there is no significant deterioration in the counterparties (loan customers) credit risk since origination of the interest rate swap. The Company values its interest rate swap positions using market prices provided by a third party which uses primarily observable market inputs. Interest rate derivatives are further described in Note 6 “Derivatives.” For purposes of potential valuation adjustments to our derivative positions, the Company evaluates the credit risk of its counterparties as well as its own credit risk. Accordingly, the Company has considered factors such as the likelihood of default, expected loss given default, net exposures and remaining contractual life, among other things, in determining if any estimated fair value adjustments related to credit risk are required. The Company reviews counterparty exposure quarterly, and when necessary, appropriate adjustments are made to reflect the exposure. For the three and six months ended June 30, 2017 or 2016 , the Company has not realized any losses due to a counterparty’s inability to pay any net uncollateralized position. As of June 30, 2017 , there were no interest rate derivatives classified as Level 3. The following table presents the assets and liabilities measured at fair value on a recurring basis: June 30, 2017 Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets: U.S. Government agencies and sponsored enterprises obligations $ — $ 14,344 $ — $ 14,344 U.S. Government agencies and sponsored enterprises mortgage-backed securities — 585,340 — 585,340 State and municipal obligations — 27,060 — 27,060 Asset-backed securities — 627,362 — 627,362 Corporate bonds and other debt securities 59,476 584,838 — 644,314 Preferred stocks and other equity securities 12,988 135,080 — 148,068 Derivative assets - Interest rate contracts — 18,044 — 18,044 Total $ 72,464 $ 1,992,068 $ — $ 2,064,532 Liabilities: Derivative liabilities - Interest rate contracts $ — $ 18,044 $ — $ 18,044 Total $ — $ 18,044 $ — $ 18,044 December 31, 2016 Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets: U.S. Government agencies and sponsored enterprises obligations $ — $ 16,314 $ — $ 16,314 U.S. Government agencies and sponsored enterprises mortgage-backed securities — 558,446 — 558,446 State and municipal obligations — 27,679 — 27,679 Asset-backed securities — 577,823 — 577,823 Corporate bonds and other debt securities 53,517 505,777 — 559,294 Preferred stocks and other equity securities 6,908 129,970 — 136,878 Derivative assets - Interest rate contracts — 15,268 — 15,268 Total $ 60,425 $ 1,831,277 $ — $ 1,891,702 Liabilities: Derivative liabilities - Interest rate contracts $ — $ 15,268 $ — $ 15,268 Total $ — $ 15,268 $ — $ 15,268 The Company's policy is to recognize transfers into or out of a level of the fair value hierarchy as of the end of the reporting period. There were no transfers of financial assets between levels of the fair value hierarchy during the three and six months ended June 30, 2017 . The inputs used to determine the estimated fair value of loans include market conditions, loan term, underlying collateral characteristics and discount rates. The inputs used to determine fair value of OREO include market conditions, estimated marketing period or holding period, underlying collateral characteristics and discount rates. For the three or six months ended June 30, 2017 , there was not a change in the methods or significant assumptions used to estimate fair value. Financial Instruments Measured at Fair Value on a Non-Recurring Basis The following is a description of the methodologies used to estimate the fair values of assets and liabilities measured at fair value on a non-recurring basis, and the level within the fair value hierarchy in which those measurements are typically classified. Impaired loans and OREO—The carrying amount of collateral dependent impaired loans is typically based on the fair value of the underlying collateral, which may be real estate or other business assets, less estimated costs to sell. The carrying value of OREO is initially measured based on the fair value, less estimated cost to sell, of the real estate acquired in foreclosure and subsequently adjusted to the lower of cost or estimated fair value, less estimated cost to sell. Fair values of real estate collateral are typically based on real estate appraisals which utilize market and income valuation techniques incorporating both observable and unobservable inputs. When current appraisals are not available, the Company may use brokers’ price opinions, home price indices, or other available information about changes in real estate market conditions to adjust the latest appraised value available. These adjustments to appraised values may be subjective and involve significant management judgment. The fair value of collateral consisting of other business assets is generally based on appraisals that use market approaches to valuation, incorporating primarily unobservable inputs. Fair value measurements related to collateral dependent impaired loans and OREO are classified within level 3 of the fair value hierarchy. The following table shows significant unobservable inputs used in the non-recurring fair value measurement of level 3 assets and liabilities: Level 3 Assets: June 30, 2017 December 31, 2016 Valuation Technique Unobservable Inputs Range (Weighted Average) (Dollars in thousands) Impaired loans $ 7,601 $ 8,878 Third party appraisals and discounted cash flows Collateral discounts and discount rates 0% - 100% (10.2%) Other real estate owned 18,540 19,228 Third party appraisals Collateral discounts and estimated cost to sell 10 % The following tables provide information about certain assets measured at fair value on a non-recurring basis: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (Dollars in thousands) Negative valuation adjustments: Impaired loans $ 207 $ 66 $ 207 $ 66 Other real estate owned 199 805 383 895 Impairment charges resulting from the non-recurring changes in fair value of the underlying collateral of impaired loans are included in the provision for loan losses in the consolidated statement of income. Impairment charges resulting from the non-recurring changes in fair value of OREO are included in other real estate and acquired assets resolution expenses in the consolidated statement of income. The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments are as follows: June 30, 2017 Carrying Value Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 100,002 $ 100,002 $ 100,002 $ — $ — Available for sale securities 2,046,488 2,046,488 72,464 1,974,024 — FHLB and other bank stock 68,372 68,372 — 68,372 — Loans, net 7,210,067 7,181,260 — — 7,181,260 Loans held for sale 24,145 24,145 — 24,145 — Bank-owned life insurance 198,250 198,250 — 198,250 — Derivative assets - Interest rate contracts 18,044 18,044 — 18,044 — Financial Liabilities: Deposits $ 7,695,190 $ 7,690,472 $ — $ 7,690,472 $ — Advances from the FHLB and other borrowings 1,019,494 1,017,383 — 1,017,383 — Derivative liabilities - Interest rate contracts 18,044 18,044 — 18,044 — December 31, 2016 Carrying Value Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 83,876 $ 83,876 $ 83,876 $ — $ — Available for sale securities 1,876,434 1,876,434 60,425 1,816,009 — FHLB and other bank stock 51,656 51,656 — 51,656 — Loans, net 6,596,997 6,556,914 — — 6,556,914 Loans held for sale 20,220 20,220 — 20,220 — Bank-owned life insurance 198,438 198,438 — 198,438 — Derivative assets - Interest rate contracts 15,268 15,268 — 15,268 — Financial Liabilities: Deposits $ 7,305,671 $ 7,306,148 $ — $ 7,306,148 $ — Advances from the FHLB and other borrowings 751,103 745,855 — 745,855 — Derivative liabilities - Interest rate contracts 15,268 15,268 — 15,268 — Certain financial instruments are carried at amounts that approximate fair value due to their short-term nature and generally negligible credit risk. Financial instruments for which fair value approximates the carrying amount at June 30, 2017 and December 31, 2016 , include cash and cash equivalents. The following methods and assumptions were used to estimate the fair value of each class of financial instruments. Estimates may differ from actual exit value as defined by ASC 820. FHLB and Other Bank Stock: FHLB and other bank stock can be liquidated only by redemption by the issuer, as there is no market for these securities. These securities are carried at par, which has historically represented the redemption price and is therefore considered to approximate fair value. Loans: Fair values for loans are based on a discounted cash flow methodology that considers various factors, including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan, whether or not the loan was amortizing and current discount rates. Loans are grouped together according to similar characteristics and are treated in the aggregate when applying various valuation techniques. The discount rates used for loans are based on current market rates for new originations of comparable credit risk and include adjustments for liquidity concerns. The ALL is considered a reasonable estimate of the required adjustment to fair value to reflect the impact of credit risk. Loans Held for Sale: Fair values of mortgage loans held for sale are based on commitments on hand from investors or prevailing market prices. Bank-owned Life Insurance: The Company holds life insurance policies on certain officers. The carrying value of these policies approximates fair value as it is based on the cash surrender value adjusted for other charges or amounts due that are probable at settlement. Deposits: The fair value of demand deposits, savings accounts and money market deposits is the amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated using discounted cash flow analysis and using the rates currently offered for deposits of similar remaining maturities. Advances from the FHLB and Other Borrowings: The fair value of advances from the FHLB and other borrowings are estimated by discounting the future cash flows using the current rate at which similar borrowings with similar remaining maturities could be obtained.

Summary of Significant Accoun22

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
General	General The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all information and notes to the consolidated financial statements necessary for a complete presentation of financial position, results of operations, comprehensive income and cash flows in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) and should be read in conjunction with the audited consolidated financial statements and the notes thereto for FCB Financial Holdings, Inc. (the “Company”) previously filed with the SEC in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 . In the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair presentation, have been included. The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the full year or any other interim period.
Nature of Operations	Nature of Operations The Company is a national bank holding company with one wholly-owned national bank subsidiary, Florida Community Bank, N.A. (“Florida Community Bank” or the “Bank”), headquartered in Weston, Florida, offering a comprehensive range of traditional banking products and services to individual and corporate customers through 46 banking centers located in Florida at June 30, 2017 .
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company, its wholly-owned subsidiary, the Bank, and the Bank’s subsidiaries, which consist of a group of real estate holding companies. Intercompany transactions and balances have been eliminated in consolidation.
Use of Estimates	Use of Estimates The Company’s financial reporting and accounting policies conform to U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates subject to significant change include the allowance for loan losses, valuation of and accounting for acquired loans, the carrying value of OREO, the fair value of financial instruments, the valuation of goodwill and other intangible assets, acquisition-related fair value computations, stock-based compensation and deferred taxes.
Recent Adopted and Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements In March 2016, the FASB issued ASU No. 2016-09, “Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” which simplifies several aspects of the accounting for employee share-based payment transactions including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. This ASU eliminates equity treatment for tax benefits or deficiencies that result from differences between the compensation cost recognized for GAAP purposes and the related tax deduction at settlement or expiration with such changes recognized in income tax expense and excludes excess tax benefits and tax deficiencies from the calculation of assumed proceeds for earnings per share purposes since such amounts are recognized in the income statement. In addition, this ASU simplifies the statements of cash flows by eliminating the bifurcation of excess tax benefits from operating activities to financing activities. The Company recognized approximately $6.7 million and $15.9 million for the three and six months ended June 30, 2017, respectively, of tax benefit in the consolidated statements of income during as a result of the adoption of this guidance that previously would have been recorded in additional paid in capital. The requirement to recognize excess tax benefits and tax deficiencies in the income statement was applied prospectively. This ASU became effective for the first quarter ended March 31, 2017. In March 2016, the FASB issued ASU No. 2016-06, “Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments” which clarifies the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under the amendments in this ASU is required to assess the embedded call (put) options solely in accordance with the four-stop decision sequence. This ASU became effective for the first quarter ended March 31, 2017. The adoption of this guidance did not have a material impact on the consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-07, “Investments-Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting” which eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments in this ASU require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. This ASU became effective for the first quarter ended March 31, 2017. The adoption of this guidance did not have a material impact on the consolidated financial statements. In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements – Going Concern (Subtopic 205-40)”. This update requires management to evaluate whether there are conditions and events that raise substantial doubt about an entity’s ability to continue as a going concern. The guidance is intended to incorporate into GAAP a requirement that management perform a going concern evaluation similar to the auditor’s evaluation required by standards issued by the Public Company Accounting Oversight Board (“PCAOB”) and American Institute of Certified Public Accountants (“AICPA”). This ASU became effective for the first quarter ended March 31, 2017. The adoption of this guidance did not have a material impact on the consolidated financial statements. Recently Issued Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, which will supersede the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific revenue recognition guidance throughout the Accounting Standards Codification. Under ASU No. 2014-09, revenue should be recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying the guidance, an entity should 1) identify the contract(s) with a customer, 2) identify the performance obligations in the contract, 3) determine the transaction price, 4) allocate the transaction price to the performance obligations in the contract, and 5) recognize revenue when the entity satisfies a performance obligation. For public entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. In August 2015, the FASB issued ASU No. 2015-14 delaying the effective date of ASU No. 2014-09. Public business entities, certain not-for-profit entities, and certain employee benefit plans should apply the guidance in ASU No. 2014-09 to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Because this guidance does not apply to revenue associated with financial instruments, including loans or securities, the new guidance is not expected to have a material impact on the components of income most closely associated with financial instruments, including securities gains/losses and interest income. The Company is currently evaluating this guidance to determine the impact on components of noninterest income. Although management has not completed its evaluation of the impact of adoption of this ASU on noninterest income, management does not expect the amount or timing of the recognition of such revenue to be materially impacted and does not expect adoption to have a material impact on the Company's consolidated financial position, results of operations or cash flows. The Company does not plan to early adopt this guidance and has not yet identified which transition method will be applied upon adoption. In January 2017, the FASB issued ASU No. 2017-04, "Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment." The amendments in this ASU modify the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. An entity no longer will determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2019 including any interim periods within that reporting period where goodwill impairment tests are performed. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows. In Februry 2017, the FASB issued ASU No. 2017-05, "Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20) : Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets." The FASB is issuing this ASU to clarify the scope of Subtopic 610-20, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets, and to add guidance for partial sales of nonfinancial assets. The amendments in this ASU will require all entities to account for the derecognition of a business or nonprofit activity in accordance with Topic 810. The amendments also eliminate several accounting differences between transactions involving assets and transactions involving businesses. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017. Public entities may apply the guidance earlier but only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The Company is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows. In March 2017, the FASB issued ASU No. 2017-08, "Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities." This ASU shortens the amortization period for certain purchased callable debt securities held at a premium. The amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. For public business entities, the amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. The Company is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows.

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost, Gross Unrealized Gains and Losses and Approximate Fair Values of Securities Available for Sale	The amortized cost, gross unrealized gains and losses and approximate fair values of securities available for sale are as follows: Amortized Cost Unrealized Fair Value June 30, 2017 Gains Losses (Dollars in thousands) Available for sale: U.S. Government agencies and sponsored enterprises obligations $ 14,470 $ 70 $ 196 $ 14,344 U.S. Government agencies and sponsored enterprises mortgage-backed securities 587,676 3,296 5,632 585,340 State and municipal obligations 27,693 134 767 27,060 Asset-backed securities 624,245 3,228 111 627,362 Corporate bonds and other debt securities 623,692 22,990 2,368 644,314 Preferred stock and other equity securities 143,244 5,061 237 148,068 Total available for sale $ 2,021,020 $ 34,779 $ 9,311 $ 2,046,488 Amortized Cost Unrealized Fair Value December 31, 2016 Gains Losses (Dollars in thousands) Available for sale: U.S. Government agencies and sponsored enterprises obligations $ 16,512 $ 76 $ 274 $ 16,314 U.S. Government agencies and sponsored enterprises mortgage-backed securities 566,377 1,760 9,691 558,446 State and municipal obligations 28,109 148 578 27,679 Asset-backed securities 574,521 3,852 550 577,823 Corporate bonds and other debt securities 560,191 4,490 5,387 559,294 Preferred stock and other equity securities 137,228 814 1,164 136,878 Total available for sale $ 1,882,938 $ 11,140 $ 17,644 $ 1,876,434
Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale	The amortized cost and estimated fair value of securities available for sale, by contractual maturity, are as follows: June 30, 2017 Amortized Cost Fair Value (Dollars in thousands) Available for sale: Due in one year or less $ — $ — Due after one year through five years 221,802 225,410 Due after five years through ten years 101,885 101,952 Due after ten years 327,698 344,012 U.S. Government agencies and sponsored enterprises obligations, mortgage-backed securities and asset-backed securities 1,226,391 1,227,046 Preferred stock and other equity securities 143,244 148,068 Total available for sale $ 2,021,020 $ 2,046,488
Summary of Estimated Fair Values and Gross Unrealized Losses on Investment Securities Available for Sale	The following tables present the estimated fair values and gross unrealized losses on investment securities available for sale, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position as of the periods presented: Less than 12 Months 12 Months or More Total June 30, 2017 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss (Dollars in thousands) Available for sale: U.S. Government agencies and sponsored enterprises obligations $ 9,959 $ 196 $ — $ — $ 9,959 $ 196 U.S. Government agencies and sponsored enterprises mortgage-backed securities 299,960 5,247 10,195 385 310,155 5,632 State and municipal obligations 24,883 767 — — 24,883 767 Asset-backed securities 60,493 111 — — 60,493 111 Corporate bonds and other debt securities 94,178 1,445 28,705 923 122,883 2,368 Preferred stock and other equity securities 40,909 237 — — 40,909 237 Total available for sale $ 530,382 $ 8,003 $ 38,900 $ 1,308 $ 569,282 $ 9,311 Less than 12 Months 12 Months or More Total December 31, 2016 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss (Dollars in thousands) Available for sale: U.S. Government agencies and sponsored enterprises obligations $ 11,577 $ 274 $ — $ — $ 11,577 $ 274 U.S. Government agencies and sponsored enterprises mortgage-backed securities 372,145 9,261 11,781 430 383,926 9,691 State and municipal obligations 25,490 578 — — 25,490 578 Asset-backed securities 11,309 21 34,855 529 46,164 550 Corporate bonds and other debt securities 179,925 3,042 77,934 2,345 257,859 5,387 Preferred stock and other equity securities 49,996 1,144 5,123 20 55,119 1,164 Total available for sale $ 650,442 $ 14,320 $ 129,693 $ 3,324 $ 780,135 $ 17,644
Summary of Gross Realized Gains and Losses on Sale of Securities Available for Sale	Gross realized gains and losses on the sale of securities available for sale are shown below. The cost of securities sold is based on the specific identification method. Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (Dollars in thousands) Gross realized gains $ 369 $ 321 $ 694 $ 1,209 Gross realized losses (1,206 ) (54 ) (1,206 ) (996 ) Net realized gains (losses) $ (837 ) $ 267 $ (512 ) $ 213

Loans, Net (Tables)

Loans, Net (Tables)	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Schedule of Loans by Portfolio and Segment	The following tables summarize the Company’s loans by portfolio and segment as of the periods presented, net of deferred fees, costs, premiums and discounts: June 30, 2017 ASC 310-30 Loans Non-ASC 310-30 Loans New Loans (1) Total (Dollars in thousands) Real estate loans: Commercial real estate $ 120,781 $ 38,043 $ 1,811,977 $ 1,970,801 Owner-occupied commercial real estate — 18,266 856,050 874,316 1-4 single family residential 28,792 62,485 2,133,883 2,225,160 Construction, land and development 15,060 5,890 706,866 727,816 Home equity loans and lines of credit — 40,809 47,686 88,495 Total real estate loans $ 164,633 $ 165,493 $ 5,556,462 $ 5,886,588 Other loans: Commercial and industrial $ 13,612 $ 5,499 $ 1,339,591 $ 1,358,702 Consumer 1,478 306 4,327 6,111 Total other loans 15,090 5,805 1,343,918 1,364,813 Total loans held in portfolio $ 179,723 $ 171,298 $ 6,900,380 $ 7,251,401 Allowance for loan losses (41,334 ) Loans held in portfolio, net $ 7,210,067 December 31, 2016 ASC 310-30 Loans Non-ASC 310-30 Loans New Loans (1) Total (Dollars in thousands) Real estate loans: Commercial real estate $ 130,628 $ 38,786 $ 1,438,427 $ 1,607,841 Owner-occupied commercial real estate — 18,477 769,814 788,291 1-4 single family residential 31,476 66,854 2,012,856 2,111,186 Construction, land and development 17,657 6,338 651,253 675,248 Home equity loans and lines of credit — 42,295 49,819 92,114 Total real estate loans $ 179,761 $ 172,750 $ 4,922,169 $ 5,274,680 Other loans: Commercial and industrial $ 15,147 $ 5,815 $ 1,332,869 $ 1,353,831 Consumer 1,681 334 4,368 6,383 Total other loans 16,828 6,149 1,337,237 1,360,214 Total loans held in portfolio $ 196,589 $ 178,899 $ 6,259,406 $ 6,634,894 Allowance for loan losses (37,897 ) Loans held in portfolio, net $ 6,596,997 (1) Balance includes $(71) thousand and $3.2 million of net deferred fees, costs, and premium and discount as of June 30, 2017 and December 31, 2016 , respectively.
Summary of Changes in Accretable Discount for ASC 310-30 Loans	Changes in accretable discount for ASC 310-30 loans for the six months ended June 30, 2017 and 2016 , were as follows: Six Months Ended June 30, 2017 2016 (Dollars in thousands) Balance at January 1, $ 60,990 $ 144,152 Accretion (2,853 ) (29,374 ) Reclassifications from (to) non-accretable difference (9,647 ) (19,706 ) Balance at June 30, $ 48,490 $ 95,072

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Summary of Changes in Allowance for Loan Losses by Loan Class and Portfolio Segment	Commercial Real Estate Owner- Occupied Commercial Real Estate 1-4 Single Family Residential Construction, Land and Development Home Equity Loans and Lines of Credit Commercial and Industrial Consumer Total (Dollars in thousands) Balance at April 1, 2017 $ 9,964 $ 2,711 $ 7,913 $ 4,918 $ 726 $ 12,953 $ 246 $ 39,431 Provision (credit) for ASC 310-30 loans 770 — 29 (77 ) — (1,127 ) (2 ) (407 ) Provision (credit) for non-ASC 310-30 loans (13 ) 4 59 (6 ) 175 (4 ) — 215 Provision (credit) for New loans 1,443 571 843 (79 ) (17 ) (461 ) 7 2,307 Total provision 2,200 575 931 (162 ) 158 (1,592 ) 5 2,115 Charge-offs for ASC 310-30 loans (9 ) — (35 ) (43 ) — (15 ) — (102 ) Charge-offs for non-ASC 310-30 loans — — (60 ) — — — — (60 ) Charge-offs for New loans — — — — — (50 ) — (50 ) Total charge-offs (9 ) — (95 ) (43 ) — (65 ) — (212 ) Recoveries for ASC 310-30 loans — — — — — — — — Recoveries for non-ASC 310-30 loans — — — — — — — — Recoveries for New loans — — — — — — — — Total recoveries — — — — — — — — Ending ALL balance ASC 310-30 loans 1,678 — 25 185 — 168 160 2,216 Non-ASC 310-30 loans 331 65 242 38 451 366 6 1,499 New loans 10,146 3,221 8,482 4,490 433 10,762 85 37,619 Balance at June 30, 2017 $ 12,155 $ 3,286 $ 8,749 $ 4,713 $ 884 $ 11,296 $ 251 $ 41,334 Commercial Real Estate Owner- Occupied Commercial Real Estate 1-4 Single Family Residential Construction, Land and Development Home Equity Loans and Lines of Credit Commercial and Industrial Consumer Total (Dollars in thousands) Balance at April 1, 2016 $ 9,454 $ 2,281 $ 7,309 $ 3,415 $ 499 $ 8,580 $ 457 $ 31,995 Provision (credit) for ASC 310-30 loans 5 — — 1 — (20 ) (16 ) (30 ) Provision (credit) for non-ASC 310-30 loans (98 ) (64 ) (26 ) 1 (6 ) (2 ) — (195 ) Provision (credit) for New loans 736 35 125 287 122 908 (12 ) 2,201 Total provision 643 (29 ) 99 289 116 886 (28 ) 1,976 Charge-offs for ASC 310-30 loans (352 ) — — (3 ) — (1 ) (2 ) (358 ) Charge-offs for non-ASC 310-30 loans — — — — — — — — Charge-offs for New loans — — — — — — — — Total charge-offs (352 ) — — (3 ) — (1 ) (2 ) (358 ) Recoveries for ASC 310-30 loans — — 31 62 — — — 93 Recoveries for non-ASC 310-30 loans — — — — — — — — Recoveries for New loans — — — — — — — — Total recoveries — — 31 62 — — — 93 Ending ALL balance ASC 310-30 loans 2,114 — 58 348 — 366 384 3,270 Non-ASC 310-30 loans 935 340 282 37 273 55 4 1,926 New loans 6,696 1,912 7,099 3,378 342 9,044 39 28,510 Balance at June 30, 2016 $ 9,745 $ 2,252 $ 7,439 $ 3,763 $ 615 $ 9,465 $ 427 $ 33,706 Commercial Real Estate Owner- Occupied Commercial Real Estate 1-4 Single Family Residential Construction, Land and Development Home Equity Loans and Lines of Credit Commercial and Industrial Consumer Total (Dollars in thousands) Balance at January 1, 2017 $ 10,123 $ 2,597 $ 7,379 $ 4,677 $ 648 $ 12,245 $ 228 $ 37,897 Provision (credit) for ASC 310-30 loans (582 ) — 31 (11 ) — (80 ) (84 ) (726 ) Provision (credit) for non-ASC 310-30 loans (45 ) 4 1 (9 ) 215 (10 ) (29 ) 127 Provision (credit) for New loans 2,785 685 1,433 99 28 (680 ) 7 4,357 Total provision 2,158 689 1,465 79 243 (770 ) (106 ) 3,758 Charge-offs for ASC 310-30 loans (9 ) — (35 ) (43 ) — (29 ) — (116 ) Charge-offs for non-ASC 310-30 loans — — (60 ) — (7 ) — — (67 ) Charge-offs for New loans (131 ) — — — — (150 ) — (281 ) Total charge-offs (140 ) — (95 ) (43 ) (7 ) (179 ) — (464 ) Recoveries for ASC 310-30 loans 14 — — — — — 100 114 Recoveries for non-ASC 310-30 loans — — — — — — 29 29 Recoveries for New loans — — — — — — — — Total recoveries 14 — — — — — 129 143 Ending ALL balance ASC 310-30 loans 1,678 — 25 185 — 168 160 2,216 Non-ASC 310-30 loans 331 65 242 38 451 366 6 1,499 New loans 10,146 3,221 8,482 4,490 433 10,762 85 37,619 Balance at June 30, 2017 $ 12,155 $ 3,286 $ 8,749 $ 4,713 $ 884 $ 11,296 $ 251 $ 41,334 Commercial Real Estate Owner- Occupied Commercial Real Estate 1-4 Single Family Residential Construction, Land and Development Home Equity Loans and Lines of Credit Commercial and Industrial Consumer Total (Dollars in thousands) Balance at January 1, 2016 $ 8,450 $ 2,243 $ 6,425 $ 3,404 $ 483 $ 7,665 $ 456 $ 29,126 Provision (credit) for ASC 310-30 loans (193 ) — 1 (9 ) — (22 ) (20 ) (243 ) Provision (credit) for non-ASC 310-30 loans (953 ) (122 ) (50 ) 1 17 (5 ) 6 (1,106 ) Provision (credit) for New loans 1,228 132 1,032 338 150 1,892 (7 ) 4,765 Total provision 82 10 983 330 167 1,865 (21 ) 3,416 Charge-offs for ASC 310-30 loans (352 ) — — (33 ) — (76 ) (2 ) (463 ) Charge-offs for non-ASC 310-30 loans — (1 ) — — (35 ) — (6 ) (42 ) Charge-offs for New loans — — — — — — — — Total charge-offs (352 ) (1 ) — (33 ) (35 ) (76 ) (8 ) (505 ) Recoveries for ASC 310-30 loans 761 — 31 62 — 11 — 865 Recoveries for non-ASC 310-30 loans 804 — — — — — — 804 Recoveries for New loans — — — — — — — — Total recoveries 1,565 — 31 62 — 11 — 1,669 Ending ALL balance ASC 310-30 loans 2,114 — 58 348 — 366 384 3,270 Non-ASC 310-30 loans 935 340 282 37 273 55 4 1,926 New loans 6,696 1,912 7,099 3,378 342 9,044 39 28,510 Balance at June 30, 2016 $ 9,745 $ 2,252 $ 7,439 $ 3,763 $ 615 $ 9,465 $ 427 $ 33,706
Summary of Aging Analysis of Recorded Investment for Loans by Portfolio and Segment	The following tables present an aging analysis of the recorded investment for delinquent loans by portfolio and segment (excluding loans accounted for under ASC 310-30): Accruing June 30, 2017 30 to 59 Days Past Due 60 to 89 Days Past Due 90 Days or More Past Due Non- Accrual Total (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ — $ — $ — $ — $ — Owner-occupied commercial real estate — — — — — 1-4 single family residential — 1,091 — 1,433 2,524 Construction, land and development — 16,200 — — 16,200 Home equity loans and lines of credit — — — 200 200 Total real estate loans — 17,291 — 1,633 18,924 Other loans: Commercial and industrial 2,342 — — — 2,342 Consumer — — — — — Total other loans 2,342 — — — 2,342 Total new loans $ 2,342 $ 17,291 $ — $ 1,633 $ 21,266 Acquired loans: Real estate loans: Commercial real estate $ — $ — $ — $ 4,258 $ 4,258 Owner-occupied commercial real estate 506 — — 403 909 1-4 single family residential — 244 — 2,370 2,614 Construction, land and development — — — — — Home equity loans and lines of credit 1,456 71 — 2,295 3,822 Total real estate loans 1,962 315 — 9,326 11,603 Other loans: Commercial and industrial — 122 — 325 447 Consumer — — — — — Total other loans — 122 — 325 447 Total acquired loans $ 1,962 $ 437 $ — $ 9,651 $ 12,050 Accruing December 31, 2016 30 to 59 Days Past Due 60 to 89 Days Past Due 90 Days or More Past Due Non- Accrual Total (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ — $ — $ — $ 581 $ 581 Owner-occupied commercial real estate — — — — — 1-4 single family residential 1,593 — — 1,821 3,414 Construction, land and development 449 — — — 449 Home equity loans and lines of credit 255 — — 243 498 Total real estate loans $ 2,297 $ — $ — $ 2,645 $ 4,942 Other loans: Commercial and industrial $ — $ — $ — $ — $ — Consumer — — — — — Total other loans — — — — — Total new loans $ 2,297 $ — $ — $ 2,645 $ 4,942 Acquired Loans: Real estate loans: Commercial real estate $ — $ — $ — $ 4,720 $ 4,720 Owner-occupied commercial real estate 93 — — 2,502 2,595 1-4 single family residential 207 — — 2,728 2,935 Construction, land and development — — — — — Home equity loans and lines of credit 520 42 — 2,557 3,119 Total real estate loans $ 820 $ 42 $ — $ 12,507 $ 13,369 Other loans: Commercial and industrial $ — $ 128 $ — $ 325 $ 453 Consumer — — — — — Total other loans — 128 — 325 453 Total acquired loans $ 820 $ 170 $ — $ 12,832 $ 13,822
Summary of Commercial Non-ASC 310-30 and New Loans by Key Indicators of Credit Quality	The following tables summarize the Company’s commercial Non-ASC 310-30 and New loans by key indicators of credit quality. Loans accounted for under ASC 310-30 are excluded from the following analysis because their related allowance is determined by loan pool performance: June 30, 2017 Pass Special Mention Substandard Doubtful (Dollars in thousands) New loans: Commercial real estate $ 1,809,790 $ — $ 2,187 $ — Owner-occupied commercial real estate 856,050 — — — Construction, land and development 706,866 — — — Commercial and industrial 1,339,591 — — — Total new loans $ 4,712,297 $ — $ 2,187 $ — Acquired loans: Commercial real estate $ 33,431 $ — $ 4,343 $ 269 Owner-occupied commercial real estate 18,174 — 92 — Construction, land and development 5,890 — — — Commercial and industrial 4,824 — 675 — Total acquired loans $ 62,319 $ — $ 5,110 $ 269 December 31, 2016 Pass Special Substandard Doubtful (Dollars in thousands) New loans: Commercial real estate $ 1,435,633 $ — $ 2,794 $ — Owner-occupied commercial real estate 769,640 174 — — Construction, land and development 651,253 — — — Commercial and industrial 1,332,869 — — — Total new loans $ 4,189,395 $ 174 $ 2,794 $ — Acquired loans: Commercial real estate $ 33,705 $ — $ 5,081 $ — Owner-occupied commercial real estate 18,388 — 89 — Construction, land and development 6,338 — — — Commercial and industrial 5,134 — 681 — Total acquired loans $ 63,565 $ — $ 5,851 $ —
Summary of Loans Based on Method for Determining Allowance	The following tables show the Company’s investment in loans disaggregated based on the method of evaluating impairment: Loans - Recorded Investment Allowance for Credit Loss June 30, 2017 Individually Evaluated for Impairment Collectively Evaluated for Impairment ASC 310- 30 Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment ASC 310- 30 Loans (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ — $ 1,811,977 $ — $ — $ 10,146 $ — Owner-occupied commercial real estate — 856,050 — — 3,221 — 1-4 single family residential 1,096 2,132,787 — — 8,482 — Construction, land and development — 706,866 — — 4,490 — Home equity loans and lines of credit 129 47,557 — 66 367 — Total real estate loans $ 1,225 $ 5,555,237 $ — $ 66 $ 26,706 $ — Other loans: Commercial and industrial $ — $ 1,339,591 $ — $ — $ 10,762 $ — Consumer — 4,327 — — 85 — Total other loans $ — $ 1,343,918 $ — $ — $ 10,847 $ — Acquired loans: Real estate loans: Commercial real estate $ 4,258 $ 33,785 $ 120,781 $ 150 $ 181 $ 1,678 Owner-occupied commercial real estate — 18,266 — — 65 — 1-4 single family residential 768 61,717 28,792 25 217 25 Construction, land and development — 5,890 15,060 — 38 185 Home equity loans and lines of credit 1,025 39,784 — 207 244 — Total real estate loans $ 6,051 $ 159,442 $ 164,633 $ 382 $ 745 $ 1,888 Other loans: Commercial and industrial $ 325 $ 5,174 $ 13,612 $ 325 $ 41 $ 168 Consumer — 306 1,478 — 6 160 Total other loans $ 325 $ 5,480 $ 15,090 $ 325 $ 47 $ 328 Loans - Recorded Investment Allowance for Credit Loss December 31, 2016 Individually Evaluated for Impairment Collectively Evaluated for Impairment ASC 310- 30 Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment ASC 310- 30 Loans (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ 581 $ 1,437,846 $ — $ 221 $ 7,271 $ — Owner-occupied commercial real estate — 769,814 — — 2,536 — 1-4 single family residential 524 2,012,332 — — 7,049 — Construction, land and development — 651,253 — — 4,391 — Home equity loans and lines of credit 66 49,753 — 66 339 — Total real estate loans $ 1,171 $ 4,920,998 $ — $ 287 $ 21,586 $ — Other loans: Commercial and industrial $ — $ 1,332,869 $ — $ — $ 11,592 $ — Consumer — 4,368 — — 78 — Total other loans $ — $ 1,337,237 $ — $ — $ 11,670 $ — Acquired Loans: Real estate loans: Commercial real estate $ 4,720 $ 34,066 $ 130,628 $ 175 $ 201 $ 2,255 Owner-occupied commercial real estate — 18,477 — — 61 — 1-4 single family residential 1,612 65,242 31,476 88 213 29 Construction, land and development — 6,338 17,657 — 47 239 Home equity loans and lines of credit 1,050 41,245 — — 243 — Total real estate loans $ 7,382 $ 165,368 $ 179,761 $ 263 $ 765 $ 2,523 Other loans: Commercial and industrial $ 325 $ 5,490 $ 15,147 $ 325 $ 51 $ 277 Consumer — 334 1,681 — 6 144 Total other loans $ 325 $ 5,824 $ 16,828 $ 325 $ 57 $ 421
Summary of Company's Impaired Loans Evaluated for Specific Reserves	The following tables set forth certain information regarding the Company’s impaired loans (excluding loans accounted for under ASC 310-30) that were evaluated for specific reserves: Impaired Loans - With Allowance Impaired Loans - With no Allowance June 30, 2017 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ — $ — $ — $ — $ — Owner-occupied commercial real estate — — — — — 1-4 single family residential — — — 1,096 1,096 Construction, land and development — — — — — Home equity loans and lines of credit 66 66 66 63 63 Total real estate loans $ 66 $ 66 $ 66 $ 1,159 $ 1,159 Other loans: Commercial and industrial $ — $ — $ — $ — $ — Consumer — — — — — Total other loans $ — $ — $ — $ — $ — Acquired loans: Real estate loans: Commercial real estate $ 605 $ 625 $ 150 $ 3,653 $ 4,991 Owner-occupied commercial real estate — — — — — 1-4 single family residential 502 512 25 267 267 Construction, land and development — — — — — Home equity loans and lines of credit 405 500 207 620 915 Total real estate loans $ 1,512 $ 1,637 $ 382 $ 4,540 $ 6,173 Other loans: Commercial and industrial $ 325 $ 325 $ 325 $ — $ — Consumer — — — — — Total other loans $ 325 $ 325 $ 325 $ — $ — Impaired Loans - With Allowance Impaired Loans - With no Allowance December 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance (Dollars in thousands) New loans: Real estate loans: Commercial real estate $ 581 $ 581 $ 221 $ — $ — Owner-occupied commercial real estate — — — — — 1-4 single family residential — — — 524 524 Construction, land and development — — — — — Home equity loans and lines of credit 66 66 66 — — Total real estate loans $ 647 $ 647 $ 287 $ 524 $ 524 Other loans: Commercial and industrial $ — $ — $ — $ — $ — Consumer — — — — — Total other loans $ — $ — $ — $ — $ — Acquired loans: Real estate loans: Commercial real estate $ 630 $ 650 $ 175 $ 4,090 $ 5,397 Owner-occupied commercial real estate — — — — — 1-4 single family residential 565 512 88 1,047 1,047 Construction, land and development — — — — — Home equity loans and lines of credit — — — 1,050 1,415 Total real estate loans $ 1,195 $ 1,162 $ 263 $ 6,187 $ 7,859 Other loans: Commercial and industrial $ 325 $ 325 $ 325 $ — $ — Consumer — — — — — Total other loans $ 325 $ 325 $ 325 $ — $ —
Summary of Impaired Loans Average Recorded Investment and Interest Income Recognized	The following table presents the average recorded investment and interest income recognized during the period subsequent to impairment on loans individually evaluated for impairment: Three Months Ended June 30, 2017 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) Impaired loans with no related allowance: Real estate loans: Commercial real estate $ 3,679 $ — $ 465 $ — Owner-occupied commercial real estate — — — — 1-4 single family residential 1,363 — 267 — Construction, land and development — — — — Home equity loans and lines of credit 686 — 907 — Total real estate loans $ 5,728 $ — $ 1,639 $ — Other loans: Commercial and industrial $ — $ — $ 877 $ — Consumer — — — — Total other loans $ — $ — $ 877 $ — Impaired loans with an allowance: Real estate loans: Commercial real estate $ 624 $ — $ 4,480 $ — Owner-occupied commercial real estate — — 2,156 — 1-4 single family residential 506 — — — Construction, land and development — — — — Home equity loans and lines of credit 471 — 38 — Total real estate loans $ 1,601 $ — $ 6,674 $ — Other loans: Commercial and industrial $ 325 $ — $ — $ — Consumer — — — — Total other loans $ 325 $ — $ — $ — Six Months Ended June 30, 2017 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) Impaired loans with no related allowance: Real estate loans: Commercial real estate $ 3,701 $ — $ 465 $ — Owner-occupied commercial real estate — — — — 1-4 single family residential 1,078 — 266 — Construction, land and development — — — — Home equity loans and lines of credit 860 — 909 — Total real estate loans $ 5,639 $ — $ 1,640 $ — Other loans: Commercial and industrial $ — $ — $ 877 $ — Consumer — — — — Total other loans $ — $ — $ 877 $ — Impaired loans with an allowance: Real estate loans: Commercial real estate $ 627 $ — $ 4,502 $ — Owner-occupied commercial real estate — — 2,186 — 1-4 single family residential 515 — — — Construction, land and development — — — — Home equity loans and lines of credit 270 — 20 — Total real estate loans $ 1,412 $ — $ 6,708 $ — Other loans: Commercial and industrial $ 350 $ — $ — $ — Consumer — — — — Total other loans $ 350 $ — $ — $ —

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Other Intangible Assets	Goodwill and other intangible assets are summarized as follows: June 30, 2017 December 31, 2016 (Dollars in thousands) Goodwill $ 81,204 $ 81,204 Core deposit intangible 14,370 14,370 Less: Accumulated amortization (10,191 ) (9,679 ) Net core deposit intangible $ 4,179 $ 4,691
Schedule of Estimated Amortization Expense for the Next Five Fiscal Years	The estimated amount of amortization expense for core deposit intangible assets to be recognized for the remainder of 2017 through 2021 is as follows: Remainder of 2017 2018 2019 2020 2021 (Dollars in thousands) Core deposit intangible $ 512 $ 1,023 $ 1,023 $ 491 $ 360

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Derivatives Outstanding Included in Other Assets and Liabilities	The following tables summarize the Company’s derivatives outstanding included in other assets and other liabilities in the accompanying consolidated balance sheets: June 30, 2017 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments under ASC 815-10 Interest rate contracts - pay floating, receive fixed $ 829,015 $ 18,044 $ 160,281 $ 2,355 Interest rate contracts - pay fixed, receive floating 160,281 — 829,015 15,689 Total derivatives $ 989,296 $ 18,044 $ 989,296 $ 18,044 December 31, 2016 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments under ASC 815-10 Interest rate contracts - pay floating, receive fixed $ 708,426 $ 15,268 $ 182,848 $ 2,908 Interest rate contracts - pay fixed, receive floating 182,848 — 708,426 12,360 Total derivatives $ 891,274 $ 15,268 $ 891,274 $ 15,268
Summary of Gross and Net Fair Values of Derivatives Outstanding Included in Other Liabilities	The following table summarizes the gross and net fair values of the Company’s derivatives outstanding with this counterparty included in other liabilities in the accompanying consolidated balance sheets: June 30, 2017 Gross amounts of recognized liabilities Gross amounts offset in the consolidated balance sheets Net amounts in the consolidated balance sheets (Dollars in thousands) Offsetting derivative liabilities: Counterparty A - Interest rate contracts $ 18,044 $ (2,355 ) $ 15,689 December 31, 2016 Gross amounts of recognized liabilities Gross amounts offset in the consolidated balance sheets Net amounts in the consolidated balance sheets (Dollars in thousands) Offsetting derivative liabilities: Counterparty A - Interest rate contracts $ 15,268 $ (2,908 ) $ 12,360

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Jun. 30, 2017
Banking and Thrift [Abstract]
Summary of Company's Deposits by Category	The following table sets forth the Company’s deposits by category: June 30, 2017 December 31, 2016 (Dollars in thousands) Noninterest-bearing demand deposits $ 1,135,922 $ 905,905 Interest-bearing demand deposits 1,117,280 1,004,452 Interest-bearing NOW accounts 401,845 398,823 Savings and money market accounts 2,970,429 2,780,697 Time deposits 2,069,714 2,215,794 Total deposits $ 7,695,190 $ 7,305,671 Time deposits $100,000 and greater $ 1,602,977 $ 1,675,162 Time deposits greater than $250,000 843,452 843,683

Accumulated Other Comprehensi29

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income	Changes in AOCI for the periods indicated are summarized as follows: Three Months Ended June 30, 2017 2016 Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax (Dollars in thousands) Balance at beginning of period $ 10,919 $ (4,178 ) $ 6,741 $ (13,414 ) $ 5,174 $ (8,240 ) Unrealized gain (loss) on investment securities available for sale: Net unrealized holdings gain (loss) arising during the period 15,112 (5,781 ) 9,331 21,657 (8,360 ) 13,297 Amounts reclassified to (gain) loss on investment securities (563 ) 215 (348 ) (394 ) 153 (241 ) Balance at end of period $ 25,468 $ (9,744 ) $ 15,724 $ 7,849 $ (3,033 ) $ 4,816 Six Months Ended June 30, 2017 2016 Before Tax Net Before Tax Net (Dollars in thousands) Balance at beginning of period $ (6,504 ) $ 2,509 $ (3,995 ) $ (15,371 ) $ 5,928 $ (9,443 ) Unrealized gain (loss) on investment securities available for sale: Net unrealized holdings gain (loss) arising during the period 32,617 (12,500 ) 20,117 24,327 (9,389 ) 14,938 Amounts reclassified to (gain) loss on investment securities (645 ) 247 (398 ) (1,107 ) 428 (679 ) Balance at end of period $ 25,468 $ (9,744 ) $ 15,724 $ 7,849 $ (3,033 ) $ 4,816

Basic and Diluted Earnings Pe30

Basic and Diluted Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table presents the computation of basic and diluted EPS: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (Dollars in thousands, except share and per share data) Net income available to common stockholders $ 35,081 $ 23,504 $ 74,070 $ 45,956 Weighted average number of common shares - basic 42,659,101 40,646,498 42,197,420 40,672,682 Effect of dilutive securities: Employee stock-based compensation awards 3,383,451 2,351,313 3,659,074 2,263,180 Weighted average number of common shares - diluted 46,042,552 42,997,811 45,856,494 42,935,862 Basic earnings per share $ 0.82 $ 0.58 $ 1.76 $ 1.13 Diluted earnings per share $ 0.76 $ 0.55 $ 1.62 $ 1.07 Weighted average number of anti-dilutive equity awards 20,000 13,774 14,973 70,797

Stock-Based Compensation and 31

Stock-Based Compensation and Other Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2017
2009 Stock Option Plan
Schedule of Option Activity	Option grant activity for the period indicated is summarized as follows: 2009 Stock Option Plan Options Weighted Average Exercise Price Outstanding at January 1, 2017 3,107,235 $ 20.62 Granted — — Exercised (1,396,193 ) 20.48 Forfeited (11,411 ) 22.73 Expired (1,169 ) 22.97 Outstanding at June 30, 2017 1,698,462 $ 20.72 Exercisable at June 30, 2017 1,590,698 $ 20.58 Vested at June 30, 2017 1,590,698 $ 20.58 Vested and expected to vest at June 30, 2017 1,698,462 $ 20.72
2013 Stock Incentive Plan
Schedule of Option Activity	Option grant activity for the period indicated is summarized as follows: 2013 Stock Incentive Plan Options Options Weighted Average Exercise Price Outstanding at January 1, 2017 2,164,258 $ 20.63 Granted — — Exercised (432,048 ) 20.17 Forfeited (2,501 ) 27.23 Expired — — Outstanding at June 30, 2017 1,729,709 $ 20.73 Exercisable at June 30, 2017 1,702,037 $ 20.62 Vested at June 30, 2017 1,702,037 $ 20.62 Vested and expected to vest at June 30, 2017 1,729,709 $ 20.73
2016 Stock Incentive Plan
Schedule of Option Activity	Option grant activity for the period indicated is summarized as follows: 2016 Stock Incentive Plan Options Options Weighted Average Exercise Price Outstanding at January 1, 2017 827,500 $ 36.11 Granted 20,000 47.33 Exercised — — Forfeited (20,000 ) 36.11 Expired — — Outstanding at June 30, 2017 827,500 $ 36.38 Exercisable at June 30, 2017 — $ — Vested at June 30, 2017 — $ — Vested and expected to vest at June 30, 2017 827,500 $ 36.38

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Summary of Unfunded Commitments	Unfunded commitments are as follows: June 30, 2017 December 31, 2016 (Dollars in thousands) Commitments to fund loans $ 745,499 $ 724,380 Unused lines of credit 468,433 410,068 Commercial and standby letters of credit 34,082 26,200 Total $ 1,248,014 $ 1,160,648

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table presents the assets and liabilities measured at fair value on a recurring basis: June 30, 2017 Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets: U.S. Government agencies and sponsored enterprises obligations $ — $ 14,344 $ — $ 14,344 U.S. Government agencies and sponsored enterprises mortgage-backed securities — 585,340 — 585,340 State and municipal obligations — 27,060 — 27,060 Asset-backed securities — 627,362 — 627,362 Corporate bonds and other debt securities 59,476 584,838 — 644,314 Preferred stocks and other equity securities 12,988 135,080 — 148,068 Derivative assets - Interest rate contracts — 18,044 — 18,044 Total $ 72,464 $ 1,992,068 $ — $ 2,064,532 Liabilities: Derivative liabilities - Interest rate contracts $ — $ 18,044 $ — $ 18,044 Total $ — $ 18,044 $ — $ 18,044 December 31, 2016 Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets: U.S. Government agencies and sponsored enterprises obligations $ — $ 16,314 $ — $ 16,314 U.S. Government agencies and sponsored enterprises mortgage-backed securities — 558,446 — 558,446 State and municipal obligations — 27,679 — 27,679 Asset-backed securities — 577,823 — 577,823 Corporate bonds and other debt securities 53,517 505,777 — 559,294 Preferred stocks and other equity securities 6,908 129,970 — 136,878 Derivative assets - Interest rate contracts — 15,268 — 15,268 Total $ 60,425 $ 1,831,277 $ — $ 1,891,702 Liabilities: Derivative liabilities - Interest rate contracts $ — $ 15,268 $ — $ 15,268 Total $ — $ 15,268 $ — $ 15,268
Significant Unobservable Inputs in Fair Value Measurement Level 3 Assets and Liabilities	The following table shows significant unobservable inputs used in the non-recurring fair value measurement of level 3 assets and liabilities: Level 3 Assets: June 30, 2017 December 31, 2016 Valuation Technique Unobservable Inputs Range (Weighted Average) (Dollars in thousands) Impaired loans $ 7,601 $ 8,878 Third party appraisals and discounted cash flows Collateral discounts and discount rates 0% - 100% (10.2%) Other real estate owned 18,540 19,228 Third party appraisals Collateral discounts and estimated cost to sell 10 %
Summary of Fair Value Measurements Related to Collateral Dependent Impaired Loans and OREO are Classified within Level 3 of the Fair Value Hierarchy	The following tables provide information about certain assets measured at fair value on a non-recurring basis: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (Dollars in thousands) Negative valuation adjustments: Impaired loans $ 207 $ 66 $ 207 $ 66 Other real estate owned 199 805 383 895
Schedule of Carrying Amounts and Estimated Fair Values, as well as the Level within the Fair Value Hierarchy	The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments are as follows: June 30, 2017 Carrying Value Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 100,002 $ 100,002 $ 100,002 $ — $ — Available for sale securities 2,046,488 2,046,488 72,464 1,974,024 — FHLB and other bank stock 68,372 68,372 — 68,372 — Loans, net 7,210,067 7,181,260 — — 7,181,260 Loans held for sale 24,145 24,145 — 24,145 — Bank-owned life insurance 198,250 198,250 — 198,250 — Derivative assets - Interest rate contracts 18,044 18,044 — 18,044 — Financial Liabilities: Deposits $ 7,695,190 $ 7,690,472 $ — $ 7,690,472 $ — Advances from the FHLB and other borrowings 1,019,494 1,017,383 — 1,017,383 — Derivative liabilities - Interest rate contracts 18,044 18,044 — 18,044 — December 31, 2016 Carrying Value Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 83,876 $ 83,876 $ 83,876 $ — $ — Available for sale securities 1,876,434 1,876,434 60,425 1,816,009 — FHLB and other bank stock 51,656 51,656 — 51,656 — Loans, net 6,596,997 6,556,914 — — 6,556,914 Loans held for sale 20,220 20,220 — 20,220 — Bank-owned life insurance 198,438 198,438 — 198,438 — Derivative assets - Interest rate contracts 15,268 15,268 — 15,268 — Financial Liabilities: Deposits $ 7,305,671 $ 7,306,148 $ — $ 7,306,148 $ — Advances from the FHLB and other borrowings 751,103 745,855 — 745,855 — Derivative liabilities - Interest rate contracts 15,268 15,268 — 15,268 —

Summary of Significant Accoun34

Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)Subsidiary	Jun. 30, 2017USD ($)SubsidiaryBanking_Center
Accounting Policies [Abstract]
Number of wholly owned subsidiary | Subsidiary	1	1
Number of banking centers | Banking_Center		46
Excess tax benefit | $	$ 6.7	$ 15.9

Investment Securities - Additio

Investment Securities - Additional Information (Detail) $ in Millions	Jun. 30, 2017USD ($)security	Dec. 31, 2016USD ($)
Investments, Debt and Equity Securities [Abstract]
Carrying value of pledged securities | $	$ 743.3	$ 594
Number of securities in security portfolio	372
Securities in an unrealized loss position	121
Securities in an unrealized loss position for less than 12 months	99

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost, Gross Unrealized Gains and Losses and Approximate Fair Values of Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	$ 2,021,020	$ 1,882,938
Available for sale securities, Unrealized Gains	34,779	11,140
Available for sale securities, Unrealized Losses	9,311	17,644
Available for sale securities, Fair Value	2,046,488	1,876,434
U.S. Government agencies and sponsored enterprises obligations
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	14,470	16,512
Available for sale securities, Unrealized Gains	70	76
Available for sale securities, Unrealized Losses	196	274
Available for sale securities, Fair Value	14,344	16,314
U.S. Government agencies and sponsored enterprises mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	587,676	566,377
Available for sale securities, Unrealized Gains	3,296	1,760
Available for sale securities, Unrealized Losses	5,632	9,691
Available for sale securities, Fair Value	585,340	558,446
State and municipal obligations
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	27,693	28,109
Available for sale securities, Unrealized Gains	134	148
Available for sale securities, Unrealized Losses	767	578
Available for sale securities, Fair Value	27,060	27,679
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	624,245	574,521
Available for sale securities, Unrealized Gains	3,228	3,852
Available for sale securities, Unrealized Losses	111	550
Available for sale securities, Fair Value	627,362	577,823
Corporate bonds and other debt securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	623,692	560,191
Available for sale securities, Unrealized Gains	22,990	4,490
Available for sale securities, Unrealized Losses	2,368	5,387
Available for sale securities, Fair Value	644,314	559,294
Preferred stock and other equity securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	143,244	137,228
Available for sale securities, Unrealized Gains	5,061	814
Available for sale securities, Unrealized Losses	237	1,164
Available for sale securities, Fair Value	$ 148,068	$ 136,878

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in one year or less at Amortized Cost	$ 0
Available for sale, Due after one year through five years at Amortized Cost	221,802
Available for sale, Due after five years through ten years at Amortized Cost	101,885
Available for sale, Due after ten years at Amortized Cost	327,698
U.S. Government agencies and sponsored enterprises obligations, mortgage-backed securities and asset-backed securities at Amortized Cost	1,226,391
Preferred stock and other equity securities, Amortized Cost	143,244
Available for sale securities, Amortized Cost	2,021,020	$ 1,882,938
Available for sale securities, Due in one year or less at Fair Value	0
Available for sale securities, Due after one year through five years at Fair Value	225,410
Available for sale securities, Due after five years through ten years at Fair Value	101,952
Available for sale securities, Due after ten years at Fair Value	344,012
U.S. Government agencies and sponsored enterprises obligations, mortgage-backed securities and asset-backed securities at Fair Value	1,227,046
Preferred stock and other equity securities, Fair Value	148,068
Total available for sale, Fair Value	$ 2,046,488	$ 1,876,434

Investment Securities - Summa38

Investment Securities - Summary of Estimated Fair Values and Gross Unrealized Losses on Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities at Fair Value, Less than 12 months	$ 530,382	$ 650,442
Available for sale securities Unrealized Loss, Less than 12 Months	8,003	14,320
Available for sale securities at Fair Value, 12 months or more	38,900	129,693
Available for sale securities Unrealized Loss, 12 months or more	1,308	3,324
Available for sale securities, Total Fair Value	569,282	780,135
Available for sale securities, Total Unrealized Loss	9,311	17,644
U.S. Government agencies and sponsored enterprises obligations
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities at Fair Value, Less than 12 months	9,959	11,577
Available for sale securities Unrealized Loss, Less than 12 Months	196	274
Available for sale securities at Fair Value, 12 months or more	0	0
Available for sale securities Unrealized Loss, 12 months or more	0	0
Available for sale securities, Total Fair Value	9,959	11,577
Available for sale securities, Total Unrealized Loss	196	274
U.S. Government agencies and sponsored enterprises mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities at Fair Value, Less than 12 months	299,960	372,145
Available for sale securities Unrealized Loss, Less than 12 Months	5,247	9,261
Available for sale securities at Fair Value, 12 months or more	10,195	11,781
Available for sale securities Unrealized Loss, 12 months or more	385	430
Available for sale securities, Total Fair Value	310,155	383,926
Available for sale securities, Total Unrealized Loss	5,632	9,691
State and municipal obligations
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities at Fair Value, Less than 12 months	24,883	25,490
Available for sale securities Unrealized Loss, Less than 12 Months	767	578
Available for sale securities at Fair Value, 12 months or more	0	0
Available for sale securities Unrealized Loss, 12 months or more	0	0
Available for sale securities, Total Fair Value	24,883	25,490
Available for sale securities, Total Unrealized Loss	767	578
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities at Fair Value, Less than 12 months	60,493	11,309
Available for sale securities Unrealized Loss, Less than 12 Months	111	21
Available for sale securities at Fair Value, 12 months or more	0	34,855
Available for sale securities Unrealized Loss, 12 months or more	0	529
Available for sale securities, Total Fair Value	60,493	46,164
Available for sale securities, Total Unrealized Loss	111	550
Corporate bonds and other debt securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities at Fair Value, Less than 12 months	94,178	179,925
Available for sale securities Unrealized Loss, Less than 12 Months	1,445	3,042
Available for sale securities at Fair Value, 12 months or more	28,705	77,934
Available for sale securities Unrealized Loss, 12 months or more	923	2,345
Available for sale securities, Total Fair Value	122,883	257,859
Available for sale securities, Total Unrealized Loss	2,368	5,387
Preferred stock and other equity securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities at Fair Value, Less than 12 months	40,909	49,996
Available for sale securities Unrealized Loss, Less than 12 Months	237	1,144
Available for sale securities at Fair Value, 12 months or more	0	5,123
Available for sale securities Unrealized Loss, 12 months or more	0	20
Available for sale securities, Total Fair Value	40,909	55,119
Available for sale securities, Total Unrealized Loss	$ 237	$ 1,164

Investment Securities - Summa39

Investment Securities - Summary of Gross Realized Gains and Losses on Sale of Securities Available for Sale (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 369	$ 321	$ 694	$ 1,209
Gross realized losses	(1,206)	(54)	(1,206)	(996)
Net realized gains (losses)	$ (837)	$ 267	$ (512)	$ 213

Loans, Net - Schedule of Loans

Loans, Net - Schedule of Loans by Portfolio and Segment (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 7,251,401		$ 6,634,894
Allowance for loan losses	(41,334)	$ (39,431)	(37,897)	$ (33,706)	$ (31,995)	$ (29,126)
Loans, net	7,210,067		6,596,997
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	351,021		375,488
Allowance for loan losses	(1,499)			(1,926)
New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,900,380		6,259,406
Allowance for loan losses	(37,619)			(28,510)
Net deferred fees, costs, and premium and discount	(71)		3,200
Total real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,886,588		5,274,680
Total real estate loans | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,556,462		4,922,169
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,970,801		1,607,841
Allowance for loan losses	(12,155)	(9,964)	(10,123)	(9,745)	(9,454)	(8,450)
Commercial real estate | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(331)			(935)
Commercial real estate | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,811,977		1,438,427
Allowance for loan losses	(10,146)			(6,696)
Owner-occupied commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	874,316		788,291
Allowance for loan losses	(3,286)	(2,711)	(2,597)	(2,252)	(2,281)	(2,243)
Owner-occupied commercial real estate | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(65)			(340)
Owner-occupied commercial real estate | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	856,050		769,814
Allowance for loan losses	(3,221)			(1,912)
1-4 single family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,225,160		2,111,186
Allowance for loan losses	(8,749)	(7,913)	(7,379)	(7,439)	(7,309)	(6,425)
1-4 single family residential | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(242)			(282)
1-4 single family residential | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,133,883		2,012,856
Allowance for loan losses	(8,482)			(7,099)
Construction, land and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	727,816		675,248
Allowance for loan losses	(4,713)	(4,918)	(4,677)	(3,763)	(3,415)	(3,404)
Construction, land and development | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(38)			(37)
Construction, land and development | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	706,866		651,253
Allowance for loan losses	(4,490)			(3,378)
Home equity loans and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	88,495		92,114
Allowance for loan losses	(884)	(726)	(648)	(615)	(499)	(483)
Home equity loans and lines of credit | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(451)			(273)
Home equity loans and lines of credit | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	47,686		49,819
Allowance for loan losses	(433)			(342)
Total other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,364,813		1,360,214
Total other loans | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,343,918		1,337,237
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,111		6,383
Allowance for loan losses	(251)	(246)	(228)	(427)	(457)	(456)
Consumer | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(6)			(4)
Consumer | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,327		4,368
Allowance for loan losses	(85)			(39)
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,358,702		1,353,831
Allowance for loan losses	(11,296)	$ (12,953)	(12,245)	(9,465)	$ (8,580)	$ (7,665)
Commercial and industrial | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(366)			(55)
Commercial and industrial | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,339,591		1,332,869
Allowance for loan losses	(10,762)			(9,044)
ASC 310-30 Loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	179,723		196,589
Allowance for loan losses	(2,216)			(3,270)
ASC 310-30 Loans | Total real estate loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	164,633		179,761
Allowance for loan losses	(1,888)		(2,523)
ASC 310-30 Loans | Total real estate loans | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Commercial real estate | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	120,781		130,628
Allowance for loan losses	(1,678)		(2,255)	(2,114)
ASC 310-30 Loans | Commercial real estate | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Owner-occupied commercial real estate | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0	0
ASC 310-30 Loans | Owner-occupied commercial real estate | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | 1-4 single family residential | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	28,792		31,476
Allowance for loan losses	(25)		(29)	(58)
ASC 310-30 Loans | 1-4 single family residential | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Construction, land and development | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,060		17,657
Allowance for loan losses	(185)		(239)	(348)
ASC 310-30 Loans | Construction, land and development | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Home equity loans and lines of credit | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0	0
ASC 310-30 Loans | Home equity loans and lines of credit | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Total other loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,090		16,828
Allowance for loan losses	(328)		(421)
ASC 310-30 Loans | Total other loans | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Consumer | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,478		1,681
Allowance for loan losses	(160)		(144)	(384)
ASC 310-30 Loans | Consumer | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Commercial and industrial | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	13,612		15,147
Allowance for loan losses	(168)		(277)	$ (366)
ASC 310-30 Loans | Commercial and industrial | New Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0		0
Allowance for loan losses	0		0
Non-ASC 310-30 Loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	171,298		178,899
Non-ASC 310-30 Loans | Total real estate loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	165,493		172,750
Non-ASC 310-30 Loans | Commercial real estate | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	38,043		38,786
Non-ASC 310-30 Loans | Owner-occupied commercial real estate | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	18,266		18,477
Non-ASC 310-30 Loans | 1-4 single family residential | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	62,485		66,854
Non-ASC 310-30 Loans | Construction, land and development | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,890		6,338
Non-ASC 310-30 Loans | Home equity loans and lines of credit | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	40,809		42,295
Non-ASC 310-30 Loans | Total other loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,805		6,149
Non-ASC 310-30 Loans | Consumer | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	306		334
Non-ASC 310-30 Loans | Commercial and industrial | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,499		$ 5,815

Loans, Net - Additional Informa

Loans, Net - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged loans as collateral for FHLB advances, carrying amount	$ 3,250,000,000		$ 3,250,000,000		$ 3,200,000,000
Loans	7,251,401,000		7,251,401,000		6,634,894,000
Purchase of loans from third parties	0	$ 0	0	$ 189,200,000
Sale of loans to third parties	55,100,000	$ 25,600,000	192,500,000	61,800,000
Reclassification between non-accretable and accretable discount			(9,600,000)	$ (19,700,000)
ASC 310-30 Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principle balance of ASC 310-30 loans	209,100,000		209,100,000		231,500,000
1-4 single family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investments of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process	3,000,000		3,000,000
Syndicated National Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 316,900,000		$ 316,900,000		$ 433,000,000

Loans, Net - Summary of Changes

Loans, Net - Summary of Changes in Accretable Discount for ASC 310-30 Loans (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning Balance	$ 60,990	$ 144,152
Accretion	(2,853)	(29,374)
Reclassifications from (to) non-accretable difference	(9,647)	(19,706)
Ending Balance	$ 48,490	$ 95,072

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Changes in Allowance for Loan Losses by Loan Class and Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 39,431	$ 31,995	$ 37,897	$ 29,126
Total provision	(2,115)	(1,976)	(3,758)	(3,416)
Total charge-offs	(212)	(358)	(464)	(505)
Total recoveries	0	93	143	1,669
Ending balance	41,334	33,706	41,334	33,706
Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(215)	195	(127)	1,106
Total charge-offs	(60)	0	(67)	(42)
Total recoveries	0	0	29	804
Ending balance	1,499	1,926	1,499	1,926
Acquired Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	407	30	726	243
Total charge-offs	(102)	(358)	(116)	(463)
Total recoveries	0	93	114	865
Ending balance	2,216	3,270	2,216	3,270
New Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(2,307)	(2,201)	(4,357)	(4,765)
Total charge-offs	(50)	0	(281)	0
Total recoveries	0	0	0	0
Ending balance	37,619	28,510	37,619	28,510
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	9,964	9,454	10,123	8,450
Total provision	(2,200)	(643)	(2,158)	(82)
Total charge-offs	(9)	(352)	(140)	(352)
Total recoveries	0	0	14	1,565
Ending balance	12,155	9,745	12,155	9,745
Commercial real estate | Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	13	98	45	953
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	804
Ending balance	331	935	331	935
Commercial real estate | Acquired Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			2,255
Total provision	(770)	(5)	582	193
Total charge-offs	(9)	(352)	(9)	(352)
Total recoveries	0	0	14	761
Ending balance	1,678	2,114	1,678	2,114
Commercial real estate | New Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(1,443)	(736)	(2,785)	(1,228)
Total charge-offs	0	0	(131)	0
Total recoveries	0	0	0	0
Ending balance	10,146	6,696	10,146	6,696
Commercial real estate | New Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Ending balance	0		0
Owner-occupied commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	2,711	2,281	2,597	2,243
Total provision	(575)	29	(689)	(10)
Total charge-offs	0	0	0	(1)
Total recoveries	0	0	0	0
Ending balance	3,286	2,252	3,286	2,252
Owner-occupied commercial real estate | Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(4)	64	(4)	122
Total charge-offs	0	0	0	(1)
Total recoveries	0	0	0	0
Ending balance	65	340	65	340
Owner-occupied commercial real estate | Acquired Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Total provision	0	0	0	0
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	0	0	0	0
Owner-occupied commercial real estate | New Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(571)	(35)	(685)	(132)
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	3,221	1,912	3,221	1,912
Owner-occupied commercial real estate | New Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Ending balance	0		0
1-4 single family residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	7,913	7,309	7,379	6,425
Total provision	(931)	(99)	(1,465)	(983)
Total charge-offs	(95)	0	(95)	0
Total recoveries	0	31	0	31
Ending balance	8,749	7,439	8,749	7,439
1-4 single family residential | Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(59)	26	(1)	50
Total charge-offs	(60)	0	(60)	0
Total recoveries	0	0	0	0
Ending balance	242	282	242	282
1-4 single family residential | Acquired Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			29
Total provision	(29)	0	(31)	(1)
Total charge-offs	(35)	0	(35)	0
Total recoveries	0	31	0	31
Ending balance	25	58	25	58
1-4 single family residential | New Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(843)	(125)	(1,433)	(1,032)
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	8,482	7,099	8,482	7,099
1-4 single family residential | New Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Ending balance	0		0
Construction, land and development
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	4,918	3,415	4,677	3,404
Total provision	162	(289)	(79)	(330)
Total charge-offs	(43)	(3)	(43)	(33)
Total recoveries	0	62	0	62
Ending balance	4,713	3,763	4,713	3,763
Construction, land and development | Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	6	(1)	9	(1)
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	38	37	38	37
Construction, land and development | Acquired Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			239
Total provision	77	(1)	11	9
Total charge-offs	(43)	(3)	(43)	(33)
Total recoveries	0	62	0	62
Ending balance	185	348	185	348
Construction, land and development | New Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	79	(287)	(99)	(338)
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	4,490	3,378	4,490	3,378
Construction, land and development | New Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Ending balance	0		0
Home equity loans and lines of credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	726	499	648	483
Total provision	(158)	(116)	(243)	(167)
Total charge-offs	0	0	(7)	(35)
Total recoveries	0	0	0	0
Ending balance	884	615	884	615
Home equity loans and lines of credit | Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(175)	6	(215)	(17)
Total charge-offs	0	0	(7)	(35)
Total recoveries	0	0	0	0
Ending balance	451	273	451	273
Home equity loans and lines of credit | Acquired Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Total provision	0	0	0	0
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	0	0	0	0
Home equity loans and lines of credit | New Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	17	(122)	(28)	(150)
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	433	342	433	342
Home equity loans and lines of credit | New Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Ending balance	0		0
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	12,953	8,580	12,245	7,665
Total provision	1,592	(886)	770	(1,865)
Total charge-offs	(65)	(1)	(179)	(76)
Total recoveries	0	0	0	11
Ending balance	11,296	9,465	11,296	9,465
Commercial and industrial | Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	4	2	10	5
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	366	55	366	55
Commercial and industrial | Acquired Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			277
Total provision	1,127	20	80	22
Total charge-offs	(15)	(1)	(29)	(76)
Total recoveries	0	0	0	11
Ending balance	168	366	168	366
Commercial and industrial | New Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	461	(908)	680	(1,892)
Total charge-offs	(50)	0	(150)	0
Total recoveries	0	0	0	0
Ending balance	10,762	9,044	10,762	9,044
Commercial and industrial | New Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Ending balance	0		0
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	246	457	228	456
Total provision	(5)	28	106	21
Total charge-offs	0	(2)	0	(8)
Total recoveries	0	0	129	0
Ending balance	251	427	251	427
Consumer | Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	0	0	29	(6)
Total charge-offs	0	0	0	(6)
Total recoveries	0	0	29	0
Ending balance	6	4	6	4
Consumer | Acquired Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			144
Total provision	2	16	84	20
Total charge-offs	0	(2)	0	(2)
Total recoveries	0	0	100	0
Ending balance	160	384	160	384
Consumer | New Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total provision	(7)	12	(7)	7
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Ending balance	85	$ 39	85	$ 39
Consumer | New Loans | ASC 310-30 Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0
Ending balance	$ 0		$ 0

Allowance for Loan Losses - Agi

Allowance for Loan Losses - Aging Analysis of Recorded Investment for Loans by Portfolio and Segment (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	$ 21,266	$ 4,942
Non- Accrual	1,633	2,645
Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	12,050	13,822
Non- Accrual	9,651	12,832
30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	2,342	2,297
30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	1,962	820
60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	17,291	0
60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	437	170
90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Total real estate loans | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	18,924	4,942
Non- Accrual	1,633	2,645
Total real estate loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	11,603	13,369
Non- Accrual	9,326	12,507
Total real estate loans | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	2,297
Total real estate loans | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	1,962	820
Total real estate loans | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	17,291	0
Total real estate loans | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	315	42
Total real estate loans | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Total real estate loans | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial real estate | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	581
Non- Accrual	0	581
Commercial real estate | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	4,258	4,720
Non- Accrual	4,258	4,720
Commercial real estate | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial real estate | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial real estate | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial real estate | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial real estate | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial real estate | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Owner-occupied commercial real estate | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Non- Accrual	0	0
Owner-occupied commercial real estate | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	909	2,595
Non- Accrual	403	2,502
Owner-occupied commercial real estate | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Owner-occupied commercial real estate | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	506	93
Owner-occupied commercial real estate | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Owner-occupied commercial real estate | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Owner-occupied commercial real estate | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Owner-occupied commercial real estate | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
1-4 single family residential | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	2,524	3,414
Non- Accrual	1,433	1,821
1-4 single family residential | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	2,614	2,935
Non- Accrual	2,370	2,728
1-4 single family residential | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	1,593
1-4 single family residential | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	207
1-4 single family residential | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	1,091	0
1-4 single family residential | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	244	0
1-4 single family residential | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
1-4 single family residential | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Construction, land and development | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	16,200	449
Non- Accrual	0	0
Construction, land and development | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Non- Accrual	0	0
Construction, land and development | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	449
Construction, land and development | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Construction, land and development | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	16,200	0
Construction, land and development | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Construction, land and development | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Construction, land and development | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Home equity loans and lines of credit | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	200	498
Non- Accrual	200	243
Home equity loans and lines of credit | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	3,822	3,119
Non- Accrual	2,295	2,557
Home equity loans and lines of credit | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	255
Home equity loans and lines of credit | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	1,456	520
Home equity loans and lines of credit | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Home equity loans and lines of credit | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	71	42
Home equity loans and lines of credit | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Home equity loans and lines of credit | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Total other loans | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	2,342	0
Non- Accrual	0	0
Total other loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	447	453
Non- Accrual	325	325
Total other loans | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	2,342	0
Total other loans | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Total other loans | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Total other loans | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	122	128
Total other loans | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Total other loans | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Consumer | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Non- Accrual	0	0
Consumer | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Non- Accrual	0	0
Consumer | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Consumer | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Consumer | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Consumer | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Consumer | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Consumer | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial and industrial | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	2,342	0
Non- Accrual	0	0
Commercial and industrial | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	447	453
Non- Accrual	325	325
Commercial and industrial | 30 to 59 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	2,342	0
Commercial and industrial | 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial and industrial | 60 to 89 Days Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial and industrial | 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	122	128
Commercial and industrial | 90 Days or More Past Due | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	0	0
Commercial and industrial | 90 Days or More Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables past due	$ 0	$ 0

Allowance for Loan Losses - S45

Allowance for Loan Losses - Summary of Commercial Non-ASC 310-30 and New Loans by Key Indicators of Credit Quality (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 7,251,401	$ 6,634,894
New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	6,900,380	6,259,406
Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	351,021	375,488
Pass | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	4,712,297	4,189,395
Pass | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	62,319	63,565
Special Mention | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	174
Special Mention | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Substandard | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	2,187	2,794
Substandard | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	5,110	5,851
Doubtful | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Doubtful | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	269	0
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	1,970,801	1,607,841
Commercial real estate | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,811,977	1,438,427
Commercial real estate | Pass | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,809,790	1,435,633
Commercial real estate | Pass | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	33,431	33,705
Commercial real estate | Special Mention | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial real estate | Special Mention | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial real estate | Substandard | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	2,187	2,794
Commercial real estate | Substandard | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	4,343	5,081
Commercial real estate | Doubtful | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial real estate | Doubtful | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	269	0
Owner-occupied commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	874,316	788,291
Owner-occupied commercial real estate | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	856,050	769,814
Owner-occupied commercial real estate | Pass | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	856,050	769,640
Owner-occupied commercial real estate | Pass | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	18,174	18,388
Owner-occupied commercial real estate | Special Mention | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	174
Owner-occupied commercial real estate | Special Mention | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Owner-occupied commercial real estate | Substandard | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Owner-occupied commercial real estate | Substandard | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	92	89
Owner-occupied commercial real estate | Doubtful | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Owner-occupied commercial real estate | Doubtful | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Construction, land and development
Financing Receivable, Recorded Investment [Line Items]
Loans	727,816	675,248
Construction, land and development | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	706,866	651,253
Construction, land and development | Pass | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	706,866	651,253
Construction, land and development | Pass | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	5,890	6,338
Construction, land and development | Special Mention | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Construction, land and development | Special Mention | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Construction, land and development | Substandard | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Construction, land and development | Substandard | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Construction, land and development | Doubtful | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Construction, land and development | Doubtful | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans	1,358,702	1,353,831
Commercial and industrial | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,339,591	1,332,869
Commercial and industrial | Pass | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,339,591	1,332,869
Commercial and industrial | Pass | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	4,824	5,134
Commercial and industrial | Special Mention | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial and industrial | Special Mention | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial and industrial | Substandard | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial and industrial | Substandard | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	675	681
Commercial and industrial | Doubtful | New Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial and industrial | Doubtful | Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 0	$ 0

Allowance for Loan Losses - S46

Allowance for Loan Losses - Summary of Loans Based on Method for Determining Allowance (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	$ 7,251,401		$ 6,634,894
Allowance for loan losses	41,334	$ 39,431	37,897	$ 33,706	$ 31,995	$ 29,126
New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	6,900,380		6,259,406
Allowance for loan losses	37,619			28,510
Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	351,021		375,488
Allowance for loan losses	1,499			1,926
Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	5,886,588		5,274,680
Total real estate loans | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	1,225		1,171
Loans - Recorded investment, Collectively evaluated for impairment	5,555,237		4,920,998
Loans - Recorded investment, ASC 310-30 loans	5,556,462		4,922,169
Allowance for credit loss, Individually evaluated for impairment	66		287
Allowance for credit loss, Collectively evaluated for impairment	26,706		21,586
Total real estate loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	6,051		7,382
Loans - Recorded investment, Collectively evaluated for impairment	159,442		165,368
Allowance for credit loss, Individually evaluated for impairment	382		263
Allowance for credit loss, Collectively evaluated for impairment	745		765
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	1,970,801		1,607,841
Allowance for loan losses	12,155	9,964	10,123	9,745	9,454	8,450
Commercial real estate | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		581
Loans - Recorded investment, Collectively evaluated for impairment	1,811,977		1,437,846
Loans - Recorded investment, ASC 310-30 loans	1,811,977		1,438,427
Allowance for credit loss, Individually evaluated for impairment	0		221
Allowance for credit loss, Collectively evaluated for impairment	10,146		7,271
Allowance for loan losses	10,146			6,696
Commercial real estate | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	4,258		4,720
Loans - Recorded investment, Collectively evaluated for impairment	33,785		34,066
Allowance for credit loss, Individually evaluated for impairment	150		175
Allowance for credit loss, Collectively evaluated for impairment	181		201
Allowance for loan losses	331			935
Owner-occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	874,316		788,291
Allowance for loan losses	3,286	2,711	2,597	2,252	2,281	2,243
Owner-occupied commercial real estate | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		0
Loans - Recorded investment, Collectively evaluated for impairment	856,050		769,814
Loans - Recorded investment, ASC 310-30 loans	856,050		769,814
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	3,221		2,536
Allowance for loan losses	3,221			1,912
Owner-occupied commercial real estate | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		0
Loans - Recorded investment, Collectively evaluated for impairment	18,266		18,477
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	65		61
Allowance for loan losses	65			340
1-4 single family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	2,225,160		2,111,186
Allowance for loan losses	8,749	7,913	7,379	7,439	7,309	6,425
1-4 single family residential | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	1,096		524
Loans - Recorded investment, Collectively evaluated for impairment	2,132,787		2,012,332
Loans - Recorded investment, ASC 310-30 loans	2,133,883		2,012,856
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	8,482		7,049
Allowance for loan losses	8,482			7,099
1-4 single family residential | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	768		1,612
Loans - Recorded investment, Collectively evaluated for impairment	61,717		65,242
Allowance for credit loss, Individually evaluated for impairment	25		88
Allowance for credit loss, Collectively evaluated for impairment	217		213
Allowance for loan losses	242			282
Construction, land and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	727,816		675,248
Allowance for loan losses	4,713	4,918	4,677	3,763	3,415	3,404
Construction, land and development | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		0
Loans - Recorded investment, Collectively evaluated for impairment	706,866		651,253
Loans - Recorded investment, ASC 310-30 loans	706,866		651,253
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	4,490		4,391
Allowance for loan losses	4,490			3,378
Construction, land and development | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		0
Loans - Recorded investment, Collectively evaluated for impairment	5,890		6,338
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	38		47
Allowance for loan losses	38			37
Home equity loans and lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	88,495		92,114
Allowance for loan losses	884	726	648	615	499	483
Home equity loans and lines of credit | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	129		66
Loans - Recorded investment, Collectively evaluated for impairment	47,557		49,753
Loans - Recorded investment, ASC 310-30 loans	47,686		49,819
Allowance for credit loss, Individually evaluated for impairment	66		66
Allowance for credit loss, Collectively evaluated for impairment	367		339
Allowance for loan losses	433			342
Home equity loans and lines of credit | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	1,025		1,050
Loans - Recorded investment, Collectively evaluated for impairment	39,784		41,245
Allowance for credit loss, Individually evaluated for impairment	207		0
Allowance for credit loss, Collectively evaluated for impairment	244		243
Allowance for loan losses	451			273
Total other loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	1,364,813		1,360,214
Total other loans | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		0
Loans - Recorded investment, Collectively evaluated for impairment	1,343,918		1,337,237
Loans - Recorded investment, ASC 310-30 loans	1,343,918		1,337,237
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	10,847		11,670
Total other loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	325		325
Loans - Recorded investment, Collectively evaluated for impairment	5,480		5,824
Allowance for credit loss, Individually evaluated for impairment	325		325
Allowance for credit loss, Collectively evaluated for impairment	47		57
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	1,358,702		1,353,831
Allowance for loan losses	11,296	12,953	12,245	9,465	8,580	7,665
Commercial and industrial | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		0
Loans - Recorded investment, Collectively evaluated for impairment	1,339,591		1,332,869
Loans - Recorded investment, ASC 310-30 loans	1,339,591		1,332,869
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	10,762		11,592
Allowance for loan losses	10,762			9,044
Commercial and industrial | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	325		325
Loans - Recorded investment, Collectively evaluated for impairment	5,174		5,490
Allowance for credit loss, Individually evaluated for impairment	325		325
Allowance for credit loss, Collectively evaluated for impairment	41		51
Allowance for loan losses	366			55
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	6,111		6,383
Allowance for loan losses	251	$ 246	228	427	$ 457	$ 456
Consumer | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		0
Loans - Recorded investment, Collectively evaluated for impairment	4,327		4,368
Loans - Recorded investment, ASC 310-30 loans	4,327		4,368
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	85		78
Allowance for loan losses	85			39
Consumer | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, Individually evaluated for impairment	0		0
Loans - Recorded investment, Collectively evaluated for impairment	306		334
Allowance for credit loss, Individually evaluated for impairment	0		0
Allowance for credit loss, Collectively evaluated for impairment	6		6
Allowance for loan losses	6			4
ASC 310-30 Loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	179,723		196,589
Allowance for loan losses	2,216			3,270
ASC 310-30 Loans | Total real estate loans | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Total real estate loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	164,633		179,761
Allowance for loan losses	1,888		2,523
ASC 310-30 Loans | Commercial real estate | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Commercial real estate | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	120,781		130,628
Allowance for loan losses	1,678		2,255	2,114
ASC 310-30 Loans | Owner-occupied commercial real estate | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Owner-occupied commercial real estate | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0	0
ASC 310-30 Loans | 1-4 single family residential | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | 1-4 single family residential | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	28,792		31,476
Allowance for loan losses	25		29	58
ASC 310-30 Loans | Construction, land and development | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Construction, land and development | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	15,060		17,657
Allowance for loan losses	185		239	348
ASC 310-30 Loans | Home equity loans and lines of credit | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Home equity loans and lines of credit | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0	0
ASC 310-30 Loans | Total other loans | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Total other loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	15,090		16,828
Allowance for loan losses	328		421
ASC 310-30 Loans | Commercial and industrial | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Commercial and industrial | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	13,612		15,147
Allowance for loan losses	168		277	366
ASC 310-30 Loans | Consumer | New Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	0		0
Allowance for loan losses	0		0
ASC 310-30 Loans | Consumer | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans - Recorded investment, ASC 310-30 loans	1,478		1,681
Allowance for loan losses	$ 160		$ 144	$ 384

Allowance for Loan Losses - S47

Allowance for Loan Losses - Summary of Impaired Loans Evaluated for Specific Reserves (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Total real estate loans | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	$ 66	$ 647
Impaired loans - With allowance, Unpaid principal balance	66	647
Impaired loans - With allowance, Related allowance	66	287
Impaired loans - With no allowance, Recorded investment	1,159	524
Impaired loans - With no allowance, Unpaid principal balance	1,159	524
Total real estate loans | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	1,512	1,195
Impaired loans - With allowance, Unpaid principal balance	1,637	1,162
Impaired loans - With allowance, Related allowance	382	263
Impaired loans - With no allowance, Recorded investment	4,540	6,187
Impaired loans - With no allowance, Unpaid principal balance	6,173	7,859
Commercial real estate | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	581
Impaired loans - With allowance, Unpaid principal balance	0	581
Impaired loans - With allowance, Related allowance	0	221
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Commercial real estate | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	605	630
Impaired loans - With allowance, Unpaid principal balance	625	650
Impaired loans - With allowance, Related allowance	150	175
Impaired loans - With no allowance, Recorded investment	3,653	4,090
Impaired loans - With no allowance, Unpaid principal balance	4,991	5,397
Owner-occupied commercial real estate | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Owner-occupied commercial real estate | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
1-4 single family residential | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	1,096	524
Impaired loans - With no allowance, Unpaid principal balance	1,096	524
1-4 single family residential | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	502	565
Impaired loans - With allowance, Unpaid principal balance	512	512
Impaired loans - With allowance, Related allowance	25	88
Impaired loans - With no allowance, Recorded investment	267	1,047
Impaired loans - With no allowance, Unpaid principal balance	267	1,047
Construction, land and development | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Construction, land and development | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Home equity loans and lines of credit | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	66	66
Impaired loans - With allowance, Unpaid principal balance	66	66
Impaired loans - With allowance, Related allowance	66	66
Impaired loans - With no allowance, Recorded investment	63	0
Impaired loans - With no allowance, Unpaid principal balance	63	0
Home equity loans and lines of credit | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	405	0
Impaired loans - With allowance, Unpaid principal balance	500	0
Impaired loans - With allowance, Related allowance	207	0
Impaired loans - With no allowance, Recorded investment	620	1,050
Impaired loans - With no allowance, Unpaid principal balance	915	1,415
Total other loans | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Total other loans | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	325	325
Impaired loans - With allowance, Unpaid principal balance	325	325
Impaired loans - With allowance, Related allowance	325	325
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Commercial and industrial | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Commercial and industrial | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	325	325
Impaired loans - With allowance, Unpaid principal balance	325	325
Impaired loans - With allowance, Related allowance	325	325
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Consumer | New Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	0	0
Consumer | Acquired Loans
Financing Receivable, Impaired [Line Items]
Impaired loans - With allowance, Recorded investment	0	0
Impaired loans - With allowance, Unpaid principal balance	0	0
Impaired loans - With allowance, Related allowance	0	0
Impaired loans - With no allowance, Recorded investment	0	0
Impaired loans - With no allowance, Unpaid principal balance	$ 0	$ 0

Allowance for Loan Losses - S48

Allowance for Loan Losses - Summary of Impaired Loans Average Recorded Investment and Interest Income Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Total real estate loans
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	$ 5,728	$ 1,639	$ 5,639	$ 1,640
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	1,601	6,674	1,412	6,708
Impaired loans with an allowance - Interest income recognized	0	0	0	0
Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	3,679	465	3,701	465
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	624	4,480	627	4,502
Impaired loans with an allowance - Interest income recognized	0	0	0	0
Owner-occupied commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	0	0	0	0
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	0	2,156	0	2,186
Impaired loans with an allowance - Interest income recognized	0	0	0	0
1-4 single family residential
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	1,363	267	1,078	266
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	506	0	515	0
Impaired loans with an allowance - Interest income recognized	0	0	0	0
Construction, land and development
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	0	0	0	0
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	0	0	0	0
Impaired loans with an allowance - Interest income recognized	0	0	0	0
Home equity loans and lines of credit
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	686	907	860	909
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	471	38	270	20
Impaired loans with an allowance - Interest income recognized	0	0	0	0
Total other loans
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	0	877	0	877
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	325	0	350	0
Impaired loans with an allowance - Interest income recognized	0	0	0	0
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	0	877	0	877
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	325	0	350	0
Impaired loans with an allowance - Interest income recognized	0	0	0	0
Consumer
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Average recorded investment	0	0	0	0
Impaired loans with no related allowance - Interest income recognized	0	0	0	0
Impaired loans with an allowance - Average recorded investment	0	0	0	0
Impaired loans with an allowance - Interest income recognized	$ 0	$ 0	$ 0	$ 0

Goodwill and Intangibles - Sche

Goodwill and Intangibles - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 81,204	$ 81,204
Core deposit intangible	14,370	14,370
Less: Accumulated amortization	(10,191)	(9,679)
Net core deposit intangible	$ 4,179	$ 4,691

Goodwill and Intangibles - Addi

Goodwill and Intangibles - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangibles	$ 256	$ 297	$ 512	$ 676

Goodwill and Intangibles - Esti

Goodwill and Intangibles - Estimated Amortization Expense for the Next Five Fiscal Years (Details) $ in Thousands	Jun. 30, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2017	$ 512
2,018	1,023
2,019	1,023
2,020	491
2,021	$ 360

Derivatives - Additional Inform

Derivatives - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Derivative [Line Items]
Carrying value of pledged securities	$ 743.3		$ 743.3		$ 594
Interest Rate Swap
Derivative [Line Items]
Carrying value of pledged securities	22.8		22.8
ERROR in label resolution.
Derivative [Line Items]
Customer swap fees in non-interest income	$ 1.9	$ 1.2	$ 3.3	$ 2.5

Derivatives - Summary of Deriva

Derivatives - Summary of Derivatives Outstanding Included in Other Assets and Liabilities (Detail) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative assets, Notional	$ 989,296	$ 891,274
Derivative assets, Fair value	18,044	15,268
Derivative liabilities, Notional	989,296	891,274
Derivative liabilities, Fair value	18,044	15,268
Interest rate contracts - pay floating, receive fixed
Derivatives, Fair Value [Line Items]
Derivative assets, Notional	829,015	708,426
Derivative assets, Fair value	18,044	15,268
Derivative liabilities, Notional	160,281	182,848
Derivative liabilities, Fair value	2,355	2,908
Interest rate contracts - pay fixed, receive floating
Derivatives, Fair Value [Line Items]
Derivative assets, Notional	160,281	182,848
Derivative assets, Fair value	0	0
Derivative liabilities, Notional	829,015	708,426
Derivative liabilities, Fair value	$ 15,689	$ 12,360

Derivatives - Summary of Gross

Derivatives - Summary of Gross and Net Fair Values of Derivatives Outstanding Included in Other Liabilities (Detail) - Interest Rate Swap - Counterparty A - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Offsetting Liabilities [Line Items]
Gross amounts of recognized liabilities	$ 18,044	$ 15,268
Gross amounts offset in the consolidated balance sheets	(2,355)	(2,908)
Net amounts in the consolidated balance sheets	$ 15,689	$ 12,360

Deposits - Summary of Company's

Deposits - Summary of Company's Deposits by Category (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Noninterest-bearing demand deposits	$ 1,135,922	$ 905,905
Interest-bearing demand deposits	1,117,280	1,004,452
Interest-bearing NOW accounts	401,845	398,823
Savings and money market accounts	2,970,429	2,780,697
Time deposits	2,069,714	2,215,794
Total deposits	7,695,190	7,305,671
Time deposits $100,000 and greater	1,602,977	1,675,162
Time deposits greater than $250,000	$ 843,452	$ 843,683

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Aggregate amount of overdraft demand deposits reclassified to loans	$ 504
Aggregate amount of time deposits, Year one	1,330,000
Aggregate amount of time deposits, Year two	693,200
Aggregate amount of time deposits, Year three	24,200
Aggregate amount of time deposits, Year four	16,500
Aggregate amount of time deposits, Year five	3,600
Brokered deposits through an insured deposits sweep program	567,400	$ 693,900
Brokered certificates of deposit	$ 778	$ 1,200

Accumulated Other Comprehensi57

Accumulated Other Comprehensive Income - Schedule of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period, before tax	$ 10,919	$ (13,414)	$ (6,504)	$ (15,371)
Balance at beginning of period, tax effect	(4,178)	5,174	2,509	5,928
Balance at beginning of period, net of tax	6,741	(8,240)	(3,995)	(9,443)
Balance at end of period, before tax	25,468	7,849	25,468	7,849
Balance at end of period, tax effect	(9,744)	(3,033)	(9,744)	(3,033)
Balance at end of period, net of tax	15,724	4,816	15,724	4,816
Accumulated Investment Gain (Loss) on Investment Securities Available for Sale
AOCI, Net of Tax [Roll Forward]
Net unrealized holdings gain (loss) arising during the period, before tax	15,112	21,657	32,617	24,327
Net unrealized holdings gain (loss) arising during the period, tax effect	(5,781)	(8,360)	(12,500)	(9,389)
Net unrealized holdings gain (loss) arising during the period, net of tax	9,331	13,297	20,117	14,938
Amounts reclassified to (gain) loss on investment securities, before tax	(563)	(394)	(645)	(1,107)
Amounts reclassified to (gain) loss on investment securities, tax effect	215	153	247	428
Amounts reclassified to (gain) loss on investment securities, net of tax	$ (348)	$ (241)	$ (398)	$ (679)

Basic and Diluted Earnings Pe58

Basic and Diluted Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 35,081	$ 23,504	$ 74,070	$ 45,956
Weighted average number of common shares-basic (shares)	42,659,101	40,646,498	42,197,420	40,672,682
Effect of dilutive securities:
Employee stock-based compensation awards and warrants (shares)	3,383,451	2,351,313	3,659,074	2,263,180
Weighted average number of common shares-diluted (shares)	46,042,552	42,997,811	45,856,494	42,935,862
Basic earnings (loss) per share (usd per share)	$ 0.82	$ 0.58	$ 1.76	$ 1.13
Diluted earnings (loss) per share (usd per share)	$ 0.76	$ 0.55	$ 1.62	$ 1.07
Weighted average number of anti-dilutive equity awards (shares)	20,000	13,774	14,973	70,797

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate	19.20%	36.80%	14.20%	36.50%
Excess tax benefit	$ 6.7		$ 15.9

Stock-Based Compensation and 60

Stock-Based Compensation and Other Benefit Plans - Schedule of Option Activity (Detail)	6 Months Ended
	Jun. 30, 2017$ / sharesshares
2009 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Beginning balance | shares	3,107,235
Granted, Options | shares	0
Exercised, Options | shares	(1,396,193)
Forfeited, Options | shares	(11,411)
Expired, Options | shares	(1,169)
Options outstanding, Ending balance | shares	1,698,462
Exercisable, Options | shares	1,590,698
Vested, Options | shares	1,590,698
Vested and expected to vest, Options | shares	1,698,462
Options outstanding, Beginning balance, Weighted average exercise price (usd per share) | $ / shares	$ 20.62
Options granted, Weighted average exercise price (usd per share) | $ / shares	0
Options exercised, Weighted average exercise price (usd per share) | $ / shares	20.48
Options forfeited, Weighted average exercise price (usd per share) | $ / shares	22.73
Options expired, Weighted average exercise price (usd per share) | $ / shares	22.97
Options Outstanding, Ending balance, Weighted average exercise price (usd per share) | $ / shares	20.72
Exercisable, Weighted average exercise price (usd per share) | $ / shares	20.58
Vested, Weighted average exercise price (usd per share) | $ / shares	20.58
Vested and expected to vest, Weighted average exercise price (usd per share) | $ / shares	$ 20.72
2013 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Beginning balance | shares	2,164,258
Granted, Options | shares	0
Exercised, Options | shares	(432,048)
Forfeited, Options | shares	(2,501)
Expired, Options | shares	0
Options outstanding, Ending balance | shares	1,729,709
Exercisable, Options | shares	1,702,037
Vested, Options | shares	1,702,037
Vested and expected to vest, Options | shares	1,729,709
Options outstanding, Beginning balance, Weighted average exercise price (usd per share) | $ / shares	$ 20.63
Options granted, Weighted average exercise price (usd per share) | $ / shares	0
Options exercised, Weighted average exercise price (usd per share) | $ / shares	20.17
Options forfeited, Weighted average exercise price (usd per share) | $ / shares	27.23
Options expired, Weighted average exercise price (usd per share) | $ / shares	0
Options Outstanding, Ending balance, Weighted average exercise price (usd per share) | $ / shares	20.73
Exercisable, Weighted average exercise price (usd per share) | $ / shares	20.62
Vested, Weighted average exercise price (usd per share) | $ / shares	20.62
Vested and expected to vest, Weighted average exercise price (usd per share) | $ / shares	$ 20.73
2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Beginning balance | shares	827,500
Granted, Options | shares	20,000
Exercised, Options | shares	0
Forfeited, Options | shares	(20,000)
Expired, Options | shares	0
Options outstanding, Ending balance | shares	827,500
Exercisable, Options | shares	0
Vested, Options | shares	0
Vested and expected to vest, Options | shares	827,500
Options outstanding, Beginning balance, Weighted average exercise price (usd per share) | $ / shares	$ 36.11
Options granted, Weighted average exercise price (usd per share) | $ / shares	47.33
Options exercised, Weighted average exercise price (usd per share) | $ / shares	0
Options forfeited, Weighted average exercise price (usd per share) | $ / shares	36.11
Options expired, Weighted average exercise price (usd per share) | $ / shares	0
Options Outstanding, Ending balance, Weighted average exercise price (usd per share) | $ / shares	36.38
Exercisable, Weighted average exercise price (usd per share) | $ / shares	0
Vested, Weighted average exercise price (usd per share) | $ / shares	0
Vested and expected to vest, Weighted average exercise price (usd per share) | $ / shares	$ 36.38

Stock-Based Compensation and 61

Stock-Based Compensation and Other Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 28, 2017	Feb. 07, 2017	Mar. 29, 2016	Jun. 30, 2017	Jun. 30, 2017	Mar. 31, 2016
2009 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to shares awards				$ 225	$ 225
Weighted average period of compensation cost to be recognized					3 months 7 days
2013 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to shares awards				185	$ 185
Weighted average period of compensation cost to be recognized						9 months
2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to shares awards				5,900	$ 5,900
Weighted average period of compensation cost to be recognized					4 years 1 month 17 days
Restricted Shares | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense				$ 776
Class A Common Stock | Restricted Shares | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)			83,593
Award fair value			$ 4,000
Directors | Restricted Stock Units (RSUs) | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)		24,800
Award fair value		$ 1,100
Share-based compensation expense					$ 560
Executive | Restricted Stock Units (RSUs) | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award fair value	$ 3,500
Share-based compensation expense					$ 330
Vest on March 30, 2017 | Directors | Restricted Stock Units (RSUs) | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage		25.00%
Vest on June 30, 2017 | Directors | Restricted Stock Units (RSUs) | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage		25.00%
Vest on September 30, 2017 | Directors | Restricted Stock Units (RSUs) | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage		25.00%
Vest on December 31, 2017 | Directors | Restricted Stock Units (RSUs) | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage		25.00%
Minimum | Executive | Restricted Stock Units (RSUs) | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	73,144
Maximum | Executive | Restricted Stock Units (RSUs) | 2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	91,430
Award fair value	$ 4,400

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Reserve for unfunded commitments	$ 901	$ 1,600

Commitments and Contingencies63

Commitments and Contingencies - Summary of Unfunded Commitments (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Line of Credit Facility [Line Items]
Unfunded credit extension commitments	$ 1,248,014	$ 1,160,648
Commitments to fund loans
Line of Credit Facility [Line Items]
Unfunded credit extension commitments	745,499	724,380
Unused lines of credit
Line of Credit Facility [Line Items]
Unfunded credit extension commitments	468,433	410,068
Commercial and standby letters of credit
Line of Credit Facility [Line Items]
Unfunded credit extension commitments	$ 34,082	$ 26,200

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers of financial assets between levels	$ 0	$ 0
Fair Value, Measurements, Recurring
Assets:
Assets, fair value	2,064,532,000	2,064,532,000	$ 1,891,702,000
Liabilities:
Liabilities, fair value	18,044,000	18,044,000	15,268,000
Fair Value, Measurements, Recurring | Derivative liabilities - Interest rate contracts | Interest Rate Swap
Liabilities:
Liabilities, fair value	18,044,000	18,044,000	15,268,000
Fair Value, Measurements, Recurring | Level 1
Assets:
Assets, fair value	72,464,000	72,464,000	60,425,000
Liabilities:
Liabilities, fair value	0	0	0
Fair Value, Measurements, Recurring | Level 1 | Derivative liabilities - Interest rate contracts | Interest Rate Swap
Liabilities:
Liabilities, fair value	0	0	0
Fair Value, Measurements, Recurring | Level 2
Assets:
Assets, fair value	1,992,068,000	1,992,068,000	1,831,277,000
Liabilities:
Liabilities, fair value	18,044,000	18,044,000	15,268,000
Fair Value, Measurements, Recurring | Level 2 | Derivative liabilities - Interest rate contracts | Interest Rate Swap
Liabilities:
Liabilities, fair value	18,044,000	18,044,000	15,268,000
Fair Value, Measurements, Recurring | Level 3
Assets:
Assets, fair value	0	0	0
Liabilities:
Liabilities, fair value	0	0	0
Fair Value, Measurements, Recurring | Level 3 | Derivative liabilities - Interest rate contracts | Interest Rate Swap
Liabilities:
Liabilities, fair value	0	0	0
Fair Value, Measurements, Recurring | U.S. Government agencies and sponsored enterprises obligations
Assets:
Assets, fair value	14,344,000	14,344,000	16,314,000
Fair Value, Measurements, Recurring | U.S. Government agencies and sponsored enterprises obligations | Level 1
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | U.S. Government agencies and sponsored enterprises obligations | Level 2
Assets:
Assets, fair value	14,344,000	14,344,000	16,314,000
Fair Value, Measurements, Recurring | U.S. Government agencies and sponsored enterprises obligations | Level 3
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | U.S. Government agencies and sponsored enterprises mortgage-backed securities
Assets:
Assets, fair value	585,340,000	585,340,000	558,446,000
Fair Value, Measurements, Recurring | U.S. Government agencies and sponsored enterprises mortgage-backed securities | Level 1
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | U.S. Government agencies and sponsored enterprises mortgage-backed securities | Level 2
Assets:
Assets, fair value	585,340,000	585,340,000	558,446,000
Fair Value, Measurements, Recurring | U.S. Government agencies and sponsored enterprises mortgage-backed securities | Level 3
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | State and municipal obligations
Assets:
Assets, fair value	27,060,000	27,060,000	27,679,000
Fair Value, Measurements, Recurring | State and municipal obligations | Level 1
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | State and municipal obligations | Level 2
Assets:
Assets, fair value	27,060,000	27,060,000	27,679,000
Fair Value, Measurements, Recurring | State and municipal obligations | Level 3
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | Asset-backed securities
Assets:
Assets, fair value	627,362,000	627,362,000	577,823,000
Fair Value, Measurements, Recurring | Asset-backed securities | Level 1
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | Asset-backed securities | Level 2
Assets:
Assets, fair value	627,362,000	627,362,000	577,823,000
Fair Value, Measurements, Recurring | Asset-backed securities | Level 3
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | Corporate bonds and other debt securities
Assets:
Assets, fair value	644,314,000	644,314,000	559,294,000
Fair Value, Measurements, Recurring | Corporate bonds and other debt securities | Level 1
Assets:
Assets, fair value	59,476,000	59,476,000	53,517,000
Fair Value, Measurements, Recurring | Corporate bonds and other debt securities | Level 2
Assets:
Assets, fair value	584,838,000	584,838,000	505,777,000
Fair Value, Measurements, Recurring | Corporate bonds and other debt securities | Level 3
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | Preferred stock and other equity securities
Assets:
Assets, fair value	148,068,000	148,068,000	136,878,000
Fair Value, Measurements, Recurring | Preferred stock and other equity securities | Level 1
Assets:
Assets, fair value	12,988,000	12,988,000	6,908,000
Fair Value, Measurements, Recurring | Preferred stock and other equity securities | Level 2
Assets:
Assets, fair value	135,080,000	135,080,000	129,970,000
Fair Value, Measurements, Recurring | Preferred stock and other equity securities | Level 3
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | Derivative assets - Interest rate contracts | Interest Rate Swap
Assets:
Assets, fair value	18,044,000	18,044,000	15,268,000
Fair Value, Measurements, Recurring | Derivative assets - Interest rate contracts | Level 1 | Interest Rate Swap
Assets:
Assets, fair value	0	0	0
Fair Value, Measurements, Recurring | Derivative assets - Interest rate contracts | Level 2 | Interest Rate Swap
Assets:
Assets, fair value	18,044,000	18,044,000	15,268,000
Fair Value, Measurements, Recurring | Derivative assets - Interest rate contracts | Level 3 | Interest Rate Swap
Assets:
Assets, fair value	$ 0	$ 0	$ 0

Fair Value Measurements - Signi

Fair Value Measurements - Significant Unobservable Inputs in Fair Value Measurement Level 3 Assets and Liabilities (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, fair value	$ 18,540	$ 19,228
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, fair value	7,181,260	6,556,914
Fair Value, Measurements, Nonrecurring | Level 3 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, fair value	7,601	8,878
Fair Value, Measurements, Nonrecurring | Level 3 | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, fair value	$ 18,540	$ 19,228
Range (Weighted Average)	10.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Minimum | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Maximum | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	100.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Weighted Average | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	10.20%

Fair Value Measurements - Sum66

Fair Value Measurements - Summary of Fair Value Measurements Related to Collateral Dependent Impaired Loans and OREO are Classified Within Level 3 of the Fair Value Hierarchy (Detail) - Fair Value, Measurements, Nonrecurring - Level 3 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Impaired loans
Negative valuation adjustments:
Negative fair valuation adjustments	$ 207	$ 66	$ 207	$ 66
Other real estate owned
Negative valuation adjustments:
Negative fair valuation adjustments	$ 199	$ 805	$ 383	$ 895

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Carrying Amounts and Estimated Fair Values, as well as the Level Within the Fair Value Hierarchy (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 100,002	$ 83,876	$ 158,865	$ 102,460
Available for sale securities	2,046,488	1,876,434
FHLB and other bank stock	68,372	51,656
Loans held for sale	24,145	20,220
Bank-owned life insurance	198,250	198,438
Deposits	7,695,190	7,305,671
Advances from the FHLB and other borrowings	1,019,494	751,103
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	100,002	83,876
Available for sale securities	2,046,488	1,876,434
FHLB and other bank stock	68,372	51,656
Loans, net	7,210,067	6,596,997
Loans held for sale	24,145	20,220
Bank-owned life insurance	198,250	198,438
Derivative assets - Interest rate contracts	18,044	15,268
Deposits	7,695,190	7,305,671
Advances from the FHLB and other borrowings	1,019,494	751,103
Derivative liabilities - Interest rate contracts	18,044	15,268
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	100,002	83,876
Available for sale securities	2,046,488	1,876,434
FHLB and other bank stock	68,372	51,656
Loans, net	7,181,260	6,556,914
Loans held for sale	24,145	20,220
Bank-owned life insurance	198,250	198,438
Derivative assets - Interest rate contracts	18,044	15,268
Deposits	7,690,472	7,306,148
Advances from the FHLB and other borrowings	1,017,383	745,855
Derivative liabilities - Interest rate contracts	18,044	15,268
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	100,002	83,876
Available for sale securities	72,464	60,425
FHLB and other bank stock	0	0
Loans, net	0	0
Loans held for sale	0	0
Bank-owned life insurance	0	0
Derivative assets - Interest rate contracts	0	0
Deposits	0	0
Advances from the FHLB and other borrowings	0	0
Derivative liabilities - Interest rate contracts	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Available for sale securities	1,974,024	1,816,009
FHLB and other bank stock	68,372	51,656
Loans, net	0	0
Loans held for sale	24,145	20,220
Bank-owned life insurance	198,250	198,438
Derivative assets - Interest rate contracts	18,044	15,268
Deposits	7,690,472	7,306,148
Advances from the FHLB and other borrowings	1,017,383	745,855
Derivative liabilities - Interest rate contracts	18,044	15,268
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Available for sale securities	0	0
FHLB and other bank stock	0	0
Loans, net	7,181,260	6,556,914
Loans held for sale	0	0
Bank-owned life insurance	0	0
Derivative assets - Interest rate contracts	0	0
Deposits	0	0
Advances from the FHLB and other borrowings	0	0
Derivative liabilities - Interest rate contracts	$ 0	$ 0