Hope Bancorp (HOPE) 10-Q 6 Aug 18 2018 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 01, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Entity Registrant Name	Hope Bancorp Inc
Entity Central Index Key	1,128,361
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		129,976,852

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Cash and cash equivalents:
Cash and due from banks	$ 175,941,000	$ 185,527,000
Interest bearing cash in other banks	290,423,000	306,473,000
Total cash and cash equivalents	466,364,000	492,000,000
Interest bearing deposits in other financial institutions and other investments	77,817,000	53,366,000
Securities available for sale, at fair value	1,835,106,000	1,720,257,000
Loans held for sale, at the lower of cost or fair value	26,866,000	29,661,000
Loans receivable, net of allowance for loan losses of $89,881 and $84,541 at June 30, 2018 and December 31, 2017, respectively	11,581,559,000	11,018,034,000
Other real estate owned (“OREO”), net	8,656,000	10,787,000
Federal Home Loan Bank (“FHLB”) stock, at cost	26,947,000	29,776,000
Premises and equipment, net	56,242,000	56,714,000
Accrued interest receivable	30,954,000	29,979,000
Deferred tax assets, net	54,510,000	55,203,000
Customers’ liabilities on acceptances	868,000	1,691,000
Bank owned life insurance (“BOLI”)	75,693,000	74,915,000
Investments in affordable housing partnerships	80,818,000	81,009,000
Goodwill	464,450,000	464,450,000
Core deposit intangible assets, net	15,292,000	16,523,000
Servicing assets, net	25,050,000	24,710,000
Other assets	42,816,000	47,642,000
Total assets	14,870,008,000	14,206,717,000
Deposits:
Noninterest bearing	3,038,265,000	2,998,734,000
Interest bearing:
Money market and NOW accounts	3,282,642,000	3,332,703,000
Savings deposits	229,746,000	240,509,000
Time deposits	5,183,942,000	4,274,663,000
Total deposits	11,734,595,000	10,846,609,000
FHLB advances	836,994,000	1,157,693,000
Federal funds purchased	0	69,900,000
Convertible notes, net	192,120,000	0
Subordinated debentures	101,386,000	100,853,000
Accrued interest payable	24,594,000	15,961,000
Acceptances outstanding	868,000	1,691,000
Commitments to fund investments in affordable housing partnerships	38,056,000	38,467,000
Other liabilities	35,719,000	47,288,000
Total liabilities	12,964,332,000	12,278,462,000
STOCKHOLDERS’ EQUITY:
Common stock, $0.001 par value; authorized 150,000,000 shares at June 30, 2018 and December 31, 2017: issued and outstanding 135,529,445 and 131,167,705 shares, respectively, at June 30, 2018, and issued and outstanding 135,511,891 shares at December 31, 2017	136,000	136,000
Additional paid-in capital	1,421,679,000	1,405,014,000
Retained earnings	607,944,000	544,886,000
Treasury stock, at cost; 4,361,740 and 0 shares at June 30, 2018 and December 31, 2017, respectively	(78,961,000)	0
Accumulated other comprehensive loss, net	(45,122,000)	(21,781,000)
Total stockholders’ equity	1,905,676,000	1,928,255,000
Total liabilities and stockholders’ equity	$ 14,870,008,000	$ 14,206,717,000

Consolidated Statements Of Fin3

Consolidated Statements Of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Loans receivable, allowance	$ 89,881	$ 84,541
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	135,529,445	135,511,891
Common stock, shares outstanding	131,167,705	135,511,891
Treasury stock, at cost, shares repurchased	4,361,740	0

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
INTEREST INCOME:
Interest and fees on loans	$ 146,188	$ 128,515	$ 284,131	$ 251,809
Interest on securities	10,899	8,741	21,000	16,854
Interest on federal funds sold and other investments	2,823	1,277	5,189	2,613
Total interest income	159,910	138,533	310,320	271,276
INTEREST EXPENSE:
Interest on deposits	30,610	18,114	55,459	32,625
Interest on FHLB advances	3,681	2,338	7,750	4,477
Interest on other borrowings and convertible notes	2,800	1,261	4,224	2,449
Total interest expense	37,091	21,713	67,433	39,551
NET INTEREST INCOME BEFORE PROVISION FOR LOAN LOSSES	122,819	116,820	242,887	231,725
PROVISION FOR LOAN LOSSES	2,300	2,760	4,800	8,360
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	120,519	114,060	238,087	223,365
NONINTEREST INCOME:
Service fees on deposit accounts	4,613	5,179	9,414	10,517
International service fees	1,212	1,119	2,232	2,227
Loan servicing fees, net	1,010	1,291	2,589	2,729
Wire transfer fees	1,250	1,343	2,457	2,529
Net gains on sales of SBA loans	3,480	3,267	6,930	6,517
Net gains on sales of other loans	431	352	1,627	772
Other income and fees	3,273	3,564	9,870	8,427
Total noninterest income	15,269	16,115	35,119	33,718
NONINTEREST EXPENSE:
Salaries and employee benefits	40,575	34,946	79,960	69,112
Occupancy	7,418	7,154	14,657	14,348
Furniture and equipment	4,023	3,556	7,744	6,969
Advertising and marketing	2,737	2,394	5,036	5,818
Data processing and communications	3,574	2,676	7,069	6,282
Professional fees	4,474	3,260	7,580	7,162
Loss on investments in affordable housing partnerships	2,613	3,055	5,243	5,216
FDIC assessments	1,611	1,004	3,378	2,014
Credit related expenses	926	113	1,698	1,996
OREO expense, net	45	1,188	(59)	2,185
Merger-related expenses	0	562	(7)	1,509
Other	3,633	4,129	7,783	9,125
Total noninterest expense	71,629	64,037	140,082	131,736
INCOME BEFORE INCOME TAXES	64,159	66,138	133,124	125,347
INCOME TAX PROVISION	16,629	25,451	34,362	48,450
NET INCOME	$ 47,530	$ 40,687	$ 98,762	$ 76,897
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 0.36	$ 0.30	$ 0.74	$ 0.57
Diluted (in dollars per share)	$ 0.36	$ 0.30	$ 0.73	$ 0.57

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 47,530	$ 40,687	$ 98,762	$ 76,897
Other comprehensive (loss) income:
Change in unrealized net holding (losses) gains on securities available for sale	(9,255)	4,768	(33,900)	7,949
Change in unrealized net holding gains (losses) on interest only strips	6	8	2	(41)
Tax effect	2,767	(2,016)	10,276	(3,340)
Other comprehensive (loss) income, net of tax	(6,482)	2,760	(23,622)	4,568
Total comprehensive income	$ 41,048	$ 43,447	$ 75,140	$ 81,465

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Treasury stock	Accumulated other comprehensive loss, net
Balance at Dec. 31, 2016	$ 1,855,473	$ 135	$ 1,400,490	$ 469,505	$ 0	$ (14,657)
Balance, shares at Dec. 31, 2016		135,240,079
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans	649		649
Issuance of shares pursuant to various stock plans, shares		57,599
Stock-based compensation	1,164		1,164
Cash dividends declared on common stock	(32,457)			(32,457)
Comprehensive income:
Net income	76,897			76,897
Other comprehensive income (loss)	4,568					4,568
Balance at Jun. 30, 2017	1,906,294	$ 135	1,402,303	513,945	0	(10,089)
Balance, shares at Jun. 30, 2017		135,297,678
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01	(188)			(469)		281
Balance at Dec. 31, 2017	1,928,255	$ 136	1,405,014	544,886	0	(21,781)
Balance, shares at Dec. 31, 2017		135,511,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans	209		209
Issuance of shares pursuant to various stock plans, shares		17,554
Stock-based compensation	1,411		1,411
Cash dividends declared on common stock	(35,235)			(35,235)
Comprehensive income:
Net income	98,762			98,762
Other comprehensive income (loss)	(23,622)					(23,622)
Repurchase of treasury stock	$ (78,961)				(78,961)
Repurchase of treasury stock, shares	(4,400,000)	(4,361,740)
Equity component of convertible notes, net of taxes	$ 15,045		15,045
Balance at Jun. 30, 2018	$ 1,905,676	$ 136	$ 1,421,679	$ 607,944	$ (78,961)	$ (45,122)
Balance, shares at Jun. 30, 2018		131,167,705

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 98,762	$ 76,897
Adjustments to reconcile net income to net cash from operating activities:
Discount accretion, net of depreciation and amortization	(3,318)	(6,244)
Stock-based compensation expense	1,868	1,506
Provision for loan losses	4,800	8,360
(Credit) provision for unfunded loan commitments	(50)	442
Valuation adjustment of premises held for sale	0	1,084
Valuation adjustment of OREO	113	1,410
Net gains on sales of SBA and other loans	(8,557)	(7,289)
Earnings on BOLI	(778)	(417)
Net change in fair value of derivatives	15	65
Net losses (gains) on sale and disposal of premises and equipment	36	(338)
Net gains on sales of OREO	(151)	(82)
Net change in fair value of equity investments with readily determinable fair value	(3,518)	0
Losses on investments in affordable housing partnership	5,074	5,047
Net change in deferred income taxes	4,408	2,544
Proceeds from sales of loans held for sale	161,621	138,413
Originations of loans held for sale	(148,086)	(111,742)
Originations of servicing assets	(3,316)	(2,612)
Net change in accrued interest receivable	(975)	1,240
Net change in other assets	2,102	(9,916)
Net change in accrued interest payable	8,633	992
Net change in other liabilities	(13,134)	(5,449)
Net cash provided by operating activities	105,549	93,911
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of interest bearing deposits in other financial institutions and other investments	(4,611)	(8,820)
Redemption of interest bearing deposits in other financial institutions and other investments	5,635	9,060
Purchase of securities available for sale	(277,627)	(245,198)
Proceeds from matured or paid-down securities available for sale	102,950	124,381
Proceeds from sales of other loans held for sale	6,296	259
Net change in loans receivable	(557,761)	(285,348)
Proceeds from sales of OREO	4,350	3,606
Purchase of FHLB stock	0	(1,148)
Redemption of FHLB stock	2,829	761
Purchase of premises and equipment	(4,329)	(4,622)
Proceeds from sales and disposals of premises and equipment held for sale	0	3,267
Investments in affordable housing partnerships	(5,480)	(6,980)
Net cash used in investing activities	(727,748)	(410,782)
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in deposits	887,987	317,760
Proceeds from FHLB advances	0	425,000
Repayment of FHLB advances	(320,000)	(385,000)
Repayment of federal funds purchased	(69,900)	0
Proceeds from convertible notes, net of issuance fees	212,920	0
Purchase of treasury stock	(78,961)	0
Cash dividends paid on common stock	(35,235)	(32,457)
Taxes paid in net settlement of restricted stock	(457)	0
Issuance of additional stock pursuant to various stock plans	209	649
Net cash provided by financing activities	596,563	325,952
NET CHANGE IN CASH AND CASH EQUIVALENTS	(25,636)	9,081
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	492,000	437,334
CASH AND CASH EQUIVALENTS, END OF PERIOD	466,364	446,415
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Interest paid	58,348	43,620
Income taxes paid	15,218	61,314
SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES
Transfer from loans receivable to OREO	1,876	7,173
Transfer from loans receivable to loans held for sale	6,155	14,590
Transfer from loans held for sale to loans receivable	478	394
Transfer from premises and equipment to premises held for sale	0	3,300
Transfer of available for sale securities to equity investments with adoption of ASU 2016-01	21,957	0
New commitments to fund affordable housing partnership investments	$ 5,000	$ 26,500

Hope Bancorp, Inc.

Hope Bancorp, Inc.	6 Months Ended
	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Hope Bancorp, Inc.	Hope Bancorp, Inc. Hope Bancorp, Inc. (“Hope Bancorp” on a parent-only basis and the “Company” on a consolidated basis), headquartered in Los Angeles, California, is the holding company for Bank of Hope (the “Bank”). As of June 30, 2018 , the Bank operated branches in California, Washington, Texas, Illinois, Alabama, Georgia, Virginia, New Jersey, and New York, loan production offices in Colorado, Texas, Oregon, Washington, Georgia, Virginia, Southern California, and Northern California, and a representative office in Seoul, Korea. The Company is a corporation organized under the laws of the state of Delaware and a bank holding company registered under the Bank Holding Company Act of 1956, as amended.

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2018
Basis Of Presentation [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements included herein have been prepared without an audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”), except for the Consolidated Statement of Financial Condition as of December 31, 2017 which was from the audited financial statements included in the Company’s 2017 Annual Report on Form 10-K. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such SEC rules and regulations. The consolidated financial statements include the accounts of Hope Bancorp and its wholly owned subsidiaries, principally Bank of Hope. All intercompany transactions and balances have been eliminated in consolidation. The Company has made all adjustments, that in the opinion of management, are necessary to fairly present the Company’s financial position at June 30, 2018 and December 31, 2017 and the results of operations for the three and six months ended June 30, 2018 and 2017 . Certain reclassifications have been made to prior period amounts to conform to the current year presentation. The results of operations for the interim periods are not necessarily indicative of results to be anticipated for the full year. The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“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 financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ significantly from those estimates. These unaudited consolidated financial statements should be read along with the audited consolidated financial statements and accompanying notes included in the Company’s 2017 Annual Report on Form 10-K. Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)”. Subsequently in July 2018, the FASB issued ASU 2018-10, “Codification Improvements to Topic 842, Leases” and ASU 2018-11, “Leases Topic 842, Targeted Improvements”, to provide additional clarification, implementation, and transition guidance on certain aspects of ASU 2016-02. ASU 2016-02 establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 and ASU 2018-10 are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. Under ASU 2018-11, an additional transition option was provided that would allow entities to not apply the new guidance in the comparative periods they present in their financial statements in the year of adoption. Under this optional transition method, entities will be allowed to continue using and presenting leases under ASC 840 for prior years comparative periods and then prospectively adopt ASC 842 on January 1, 2019, recognizing a cumulative-effect adjustment to the opening balance of retained earnings. The Company estimated that there are approximately 100 operating leases that will be accounted for under ASU 2016-02 at the adoption date. The Company plans to elect the transition option to not reassess the following at adoption date: whether contracts are or contain leases, the lease classification for any expired or existing leases, and the evaluation of initial direct costs associated with existing leases. In July 2018, the Company engaged a new software vendor to assist the Company with the administration and accounting of leases under ASU 2016-02. The Company is currently in the process of evaluating the financial impact of the pending adoption of the new standard on its consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, also referred to as “CECL”. ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. ASU 2016-13 becomes effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2019. The Company has established a CECL committee to oversee the development and implementation of ASU 2016-13. The Company is collaborating with a third party advisory team and has completed a gap assessment, a full implementation road-map and a detailed project plan. The Company has also engaged a software vendor to assist the Company to build a model that is compliant with ASU 2016-13 by the effective date. Based on the Company’s initial assessment of the ASU 2016-13, the Company expects the new guidance will result in additional required allowance for loan losses which could potentially have a material impact on its consolidated financial statements and regulatory capital ratios. In January 2017, the FASB issued ASU 2017-04, “Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment.” ASU 2017-04 will amend and simplify current goodwill impairment testing to eliminate Step 2 from the current provisions. Under the new guidance, an entity should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. An entity still has the option to perform the quantitative assessment for a reporting unit to determine if a quantitative impairment test is necessary. ASU 2017-04 should be adopted for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements. In March 2017, the FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities”. ASU 2017-08 was issued to amend the amortization period for certain callable debt securities held at a premium. ASU 2017-08 shortens the amortization period of premiums on certain purchased callable debt securities to the earliest call date. ASU 2017-08 affect all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). ASU 2017-08 does not impact securities purchased at a discount, which continue to be amortized to maturity. ASU 2017-08 is effective for annual period beginning after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted in an interim period. If an entity chooses to adopt early, any adjustments should be reflected as of the beginning of the fiscal year that includes the interim period. The adoption of ASU 2017-08 is not expected to have a material impact on the Company’s consolidated financial statements. In June 2018, the FASB issued ASU 2018-07, “ Compensation - Stock Compensation (Topic 718): Improvements to Nonemployees Share-Based Payment Accounting”. ASU 2018-07 expands the scope of Topic 718 (which currently only includes share-based payments to employees) to include share-based payments issued to nonemployees for goods or services. As ASU 2018-07 becomes effective, the accounting for share-based payments for nonemployees and employees will be substantially the same. The ASU supersedes Subtopic 505-50, Equity – Equity-Based Payments to Non-Employees. ASU 2018-07 is effective for annual period beginning after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted, but no earlier than a company’s adoption date of Topic 606, Revenue from Contracts with Customers. The adoption of ASU 2018-07 is not expected to have a material impact on the Company’s consolidated financial statements as the Company has not historically issued share-based payments to nonemployees for goods and services.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company has a stock-based incentive plan (the “2016 Plan”) to award equity as a form of compensation. The 2016 Plan, was approved by the Company’s stockholders on September 1, 2016. The 2016 Plan provides for grants of stock options, stock appreciation rights (“SARs”), restricted stock, performance shares, and performance units (sometimes referred to individually or collectively as “awards”) to non-employee directors, employees, and consultants of the Company. Stock options may be either incentive stock options (“ISOs”), as defined in Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”), or nonqualified stock options (“NQSOs”). The 2016 Plan gives the Company flexibility to (i) attract and retain qualified non-employee directors, executives, other key employees, and consultants with appropriate equity-based awards to; (ii) motivate high levels of performance; (iii) recognize employee contributions to the Company’s success; and (iv) align the interests of the 2016 Plan participants with those of the Company’s stockholders. The plan initially had 2,400,000 shares available for grant to participants. The exercise price for shares under an ISO may not be less than 100% of fair market value on the date the award is granted under Code Section 422. Similarly, under the terms of the 2016 Plan, the exercise price for SARs and NQSOs may not be less than 100% of fair market value on the date of grant. Performance units are awarded to a participant at the market price of the Company’s common stock on the date of award (after the lapse of the restriction period and the attainment of the performance criteria). No minimum exercise price is prescribed for performance shares and restricted stock awarded under the 2016 Plan. All options not exercised generally expire 10 years after the date of grant. ISOs, SARs and NQSOs have vesting periods of three to five years and have 10 -year contractual terms. Restricted stock, performance shares, and performance units are granted with a restriction period of not less than one year from the grant date for performance-based awards and not more than three years from the grant date for time-based vesting of grants. Compensation expense for awards is recognized over the vesting period. The Company had another stock-based incentive plan, the 2007 Equity Incentive Plan (“2007 Plan”), which was approved by stockholders in May 2007. Under the terms of this plan, awards cannot be granted under the plan more than ten years after the plan adoption date. Therefore, subsequent to May 2017, equity awards were not issued from this plan. Under the 2016 Plan, 1,113,746 shares were available for future grants as of June 30, 2018 . The total shares reserved for issuance will serve as the underlying value for all equity awards under the 2016 Plan. With the exception of the shares underlying stock options and restricted stock awards, the board of directors may choose to settle the awards by paying the equivalent cash value or by delivering the appropriate number of shares. The following is a summary of stock option activity under the 2016 Plan for the six months ended June 30, 2018 : Number of Shares Weighted- Average Exercise Price Per Share Weighted- Average Remaining Contractual Life (Years) Aggregate Intrinsic Value (Dollars in thousands) Outstanding - January 1, 2018 1,075,423 $ 15.06 Granted — — Exercised (16,742 ) 11.76 Expired (3,195 ) 16.66 Forfeited (24,000 ) 17.18 Outstanding - June 30, 2018 1,031,486 $ 15.06 6.82 $ 2,861 Options exercisable - June 30, 2018 665,380 $ 13.98 6.14 $ 2,564 The following is a summary of restricted stock and performance unit activity under the 2016 Plan for the six months ended June 30, 2018 : Number of Shares Weighted- Average Grant Date Fair Value Outstanding - January 1, 2018 379,419 $ 16.42 Granted 266,225 16.23 Vested (63,105 ) 15.51 Forfeited (17,556 ) 16.12 Outstanding - June 30, 2018 564,983 $ 16.50 The total fair value of restricted stock and performance units vested for the six months ended June 30, 2018 and 2017 was $1.2 million and $1.3 million , respectively. On August, 21, 2017 the Company adopted the Hope Employee Stock Purchase Plan (“ESPP”). The ESPP allows eligible employees to purchase the Company’s common shares through payroll deductions which build up between the offering date and the purchase date. At the purchase date, the Company uses the accumulated funds to purchase shares in the Company on behalf of the participating employees at a 10% discount to the closing price of the Company’s common shares. The closing price is the lower of either the closing price on the first day of the offering period or on the closing price on the purchase date. The dollar amount of common shares purchased under the ESPP must not exceed 20% of the participating employee’s base salary, subject to a cap of $25 thousand in stock value based on the grant date. The ESPP is considered compensatory under GAAP and compensation expense for the ESPP is recognized as part of the Company’s stock based compensation expenses. The compensation expense for ESPP during the six months ended June 30, 2018 and 2017 was $148 thousand and $0 , respectively. The amount charged against income related to stock-based payment arrangements, including ESPP, was $915 thousand and $760 thousand for the three months ended June 30, 2018 and 2017 , respectively. For the six months ended June 30, 2018 and 2017, $1.9 million and $1.5 million , respectively, of stock-based payment arrangements were charged against income. The income tax benefit recognized was approximately $237 thousand and $292 thousand for the three months ended June 30, 2018 and 2017 , respectively. The income tax benefit recognized for the six months ended June 30, 2018 and 2017, was approximately $482 thousand and $582 thousand , respectively. At June 30, 2018 , the unrecognized compensation expense related to non-vested stock option grants was $669 thousand which is expected to be recognized over a weighted average vesting period of 2.72 years. Unrecognized compensation expense related to non-vested restricted stock and performance units was $6.1 million which is expected to be recognized over a weighted average vesting period of 2.70 years.

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share ("EPS")	Earnings Per Share (“EPS”) Basic EPS does not reflect the possibility of dilution that could result from the issuance of additional shares of common stock upon exercise or conversion of outstanding equity awards or convertible notes, and is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if stock options or other contracts to issue common stock were exercised or converted to common stock that would then share in earnings. For the three months ended June 30, 2018 and 2017, stock options and restricted shares awards for 306,136 and 530,334 shares of common stock, respectively, were excluded in computing diluted earnings per common share because they were anti-dilutive. For the six months ended June 30, 2018 and 2017 , stock options and restricted shares awards for 303,338 and 542,328 shares of common stock, respectively, were excluded in computing diluted earnings per common share because they were anti-dilutive. Additionally, warrants issued pursuant to the Company’s participation in the U.S. Treasury’s TARP Capital Purchase Plan, to purchase 20,673 shares and 20,087 shares of common stock were anti-dilutive and excluded for the three and six months ended June 30, 2018 and 2017 , respectively. During the second quarter of 2018, the Company issued $217.5 million in convertible notes. The convertible notes can be converted to the Company’s shares of common stock at an initial rate of 45.0760 shares per $1,000 principal amount of the notes (See footnote 10 “Subordinated Debentures and Convertible Notes” for additional information regarding convertible notes issued). For the three and six months ended June 30, 2018 , shares related to the convertible notes issued were not included in the Company’s diluted EPS calculation. In accordance with the terms of the convertible notes and settlement options available to the Company, no shares would have been delivered to investors of the convertible notes upon assumed conversion based on the Company’s common stock price during the three and six months ended June 30, 2018 . On April 26, 2018, the Company’s Board of Directors approved a share repurchase program that authorized the Company to repurchase up to $100.0 million in common stock. During the second quarter of 2018, the Company repurchased 4.4 million shares of common stock totaling $79.0 million which were recorded as treasury stock and these shares were excluded from weighted average shares and weighted average diluted shares for the three and six months ended June 30, 2018 after they were repurchased. The following tables show the computation of basic and diluted EPS for the three and six months ended June 30, 2018 and 2017 . Three Months Ended June 30, 2018 2017 Net Income (Numerator) Weighted-Average Shares (Denominator) Per Share (Amount) Net Income (Numerator) Weighted-Average Shares Per Share (Amount) (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 47,530 133,061,304 $ 0.36 $ 40,687 135,257,044 $ 0.30 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 291,537 356,137 Diluted EPS - common stock $ 47,530 133,352,841 $ 0.36 $ 40,687 135,613,181 $ 0.30 Six Months Ended June 30, 2018 2017 Net Income (Numerator) Weighted-Average Shares Per Share (Amount) Net Income (Numerator) Weighted-Average Shares Per Share (Amount) (In thousands, except share and per share data) Basic EPS - common stock $ 98,762 134,283,216 $ 0.74 $ 76,897 135,252,556 $ 0.57 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 293,528 432,508 Diluted EPS - common stock $ 98,762 134,576,744 $ 0.73 $ 76,897 135,685,064 $ 0.57

Equity Investment Securities (N

Equity Investment Securities (Notes)	6 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Equity Investment Securities	Equity Investments On January 1, 2018, the Company adopted ASU 2016-01, “ Recognition and Measurement of Financial Assets and Financial Liabilities”. As a result of the adoption, the Company reclassified $469 thousand in net unrealized losses included in other comprehensive income and deferred tax assets as of December 31, 2017 to retained earnings on January 1, 2018. Equity investments with readily determinable fair value at June 30, 2018, consisted of mutual funds and equity stock in other institutions in the amount of $21.4 million and $4.1 million , respectively and is included in “Interest bearing deposits in other financial institutions and other investments” on the consolidated statements of financial condition. In accordance with ASU 2016-01, the change in fair value for equity investments with readily determinable fair value for the three and six months ended June 30, 2018 were recorded as other noninterest income as summarized in the table below: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 (Dollars in thousands) Net change in fair value recorded during the period on equity investment securities $ (1 ) $ 3,518 Net change in fair value recorded on equity investment securities sold during the period — — Net change in fair value on equity investment securities at end of period $ (1 ) $ 3,518 At June 30, 2018, the Company also had equity investment without readily determinable fair value which are carried at cost less any determined impairment. The balance of these investments are adjusted for changes in subsequent observable prices. At June 30, 2018 the total balance of equity investments without readily determinable fair values included in “Interest bearing deposits in other financial institutions and other investments” on the consolidated statements of financial condition was $18.2 million , consisting of $370 thousand in correspondent bank stock and community reinvestment act investments of $17.8 million . There was no impairment or subsequent observable price changes for investments without readily determinable fair values for the three and six month ended June 30, 2018.

Securities Available for Sale

Securities Available for Sale	6 Months Ended
	Jun. 30, 2018
Available-for-sale Securities [Abstract]
Securities Available for Sale	Securities Available for Sale The following is a summary of securities available for sale as of the dates indicated: At June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 928,000 $ 104 $ (31,017 ) $ 897,087 Mortgage-backed securities: Residential 450,690 46 (16,141 ) 434,595 Commercial 435,745 123 (15,597 ) 420,271 Corporate securities 5,000 — (595 ) 4,405 Municipal securities 80,725 281 (2,258 ) 78,748 Total investment securities available for sale $ 1,900,160 $ 554 $ (65,608 ) $ 1,835,106 At December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 856,193 $ 58 $ (17,542 ) $ 838,709 Mortgage-backed securities: Residential 477,676 521 (6,983 ) 471,214 Commercial 308,046 — (6,681 ) 301,365 Corporate securities 4,997 — (522 ) 4,475 Municipal securities 82,542 870 (875 ) 82,537 Total debt securities 1,729,454 1,449 (32,603 ) 1,698,300 Mutual funds 22,425 17 (485 ) 21,957 Total investment securities available for sale $ 1,751,879 $ 1,466 $ (33,088 ) $ 1,720,257 As of June 30, 2018 and December 31, 2017 , there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders’ equity. At June 30, 2018 and December 31, 2017 , $46.2 million and $19.0 million , respectively, in unrealized losses on securities available for sale net of taxes were included in accumulated other comprehensive loss. Also included in accumulated other comprehensive loss at June 30, 2018 and December 31, 2017 , were unrealized losses on interest only strip net of taxes of $47 thousand and $41 thousand , respectively. There were no reclassifications out of accumulated other comprehensive loss into earnings during the three and six months ended June 30, 2018 or 2017. On January 1, 2018, the Company adopted ASU 2016-01 “ Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities” . As a result of the adoption of ASU 2016-01, the Company no longer accounts for mutual funds as available-for-sale securities and accounts for these investments as equity investments with readily determinable fair value with changes in fair value recorded through earnings. In accordance with ASU 2016-01, the Company reclassified $469 thousand in net unrealized losses included in other comprehensive income and deferred tax assets as of December 31, 2017 to retained earnings on January 1, 2018. The subsequent changes to fair value for mutual funds were recorded as other noninterest income for the three and six months ended June 30, 2018 . The amortized cost and estimated fair value of investment securities at June 30, 2018 , by contractual maturity, is presented in the table below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately. Amortized Cost Estimated Fair Value (Dollars in thousands) Available for sale: Due within one year $ — $ — Due after one year through five years 12,168 12,274 Due after five years through ten years 33,467 33,184 Due after ten years 40,090 37,695 U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations 928,000 897,087 Mortgage-backed securities: Residential 450,690 434,595 Commercial 435,745 420,271 Total $ 1,900,160 $ 1,835,106 Securities with carrying values of approximately $356.8 million and $359.2 million at June 30, 2018 and December 31, 2017 , respectively, were pledged to secure public deposits, pledged for various borrowings, and for other purposes as required or permitted by law. The following tables show the Company’s investments’ gross unrealized losses and estimated fair values, aggregated by investment category and the length of time that the individual securities have been in a continuous unrealized loss position as of the dates indicated. As of June 30, 2018 Less than 12 months 12 months or longer Total Description of Securities Number Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses Number of Fair Value Gross Unrealized Losses (Dollars in thousands) Collateralized mortgage obligations* 41 $ 399,114 $ (11,993 ) 55 $ 393,190 $ (19,024 ) 96 $ 792,304 $ (31,017 ) Mortgage-backed securities: Residential* 27 212,680 (6,103 ) 22 198,956 (10,038 ) 49 411,636 (16,141 ) Commercial* 21 243,579 (6,885 ) 10 129,984 (8,712 ) 31 373,563 (15,597 ) Corporate securities 1 4,405 (595 ) — — — 1 4,405 (595 ) Municipal securities 63 39,391 (694 ) 3 20,090 (1,564 ) 66 59,481 (2,258 ) Total 153 $ 899,169 $ (26,270 ) 90 $ 742,220 $ (39,338 ) 243 $ 1,641,389 $ (65,608 ) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises As of December 31, 2017 Less than 12 months 12 months or longer Total Description of Securities Number of Securities Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses (Dollars in thousands) Collateralized mortgage obligations 38 $ 425,198 $ (5,954 ) 53 $ 408,526 $ (11,588 ) 91 $ 833,724 $ (17,542 ) Mortgage-backed securities: Residential* 20 195,086 (1,282 ) 23 230,616 (5,701 ) 43 425,702 (6,983 ) Commercial* 16 186,357 (1,614 ) 8 115,008 (5,067 ) 24 301,365 (6,681 ) Corporate securities 1 4,475 (522 ) — — — 1 4,475 (522 ) Municipal securities 18 9,295 (69 ) 3 22,144 (806 ) 21 31,439 (875 ) Mutual funds 1 8,899 (101 ) 3 11,579 (384 ) 4 20,478 (485 ) Total 94 $ 829,310 $ (9,542 ) 90 $ 787,873 $ (23,546 ) 184 $ 1,617,183 $ (33,088 ) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises The Company evaluates securities for other-than-temporary-impairment (“OTTI”) on at least a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to the financial condition and near-term prospects of the issuer, the length of time and the extent to which the fair values of the securities have been less than the cost of the securities, and management’s intention to sell, or whether it is more likely than not that management will be required to sell the security in an unrealized loss position before recovery of its amortized cost basis. In analyzing an issuer’s financial condition, the Company considers, among other considerations, whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and the results of reviews of the issuer’s financial condition. The Company had collateralized mortgage obligations, mortgage backed securities, and municipal securities that were in a continuous unrealized loss position for twelve months or longer as of June 30, 2018 . The collateralized mortgage obligations in a continuous loss position for twelve months or longer had unrealized losses of $19.0 million at June 30, 2018 and total mortgage backed securities in a continuous loss position for twelve months or longer had total unrealized losses of $18.8 million . These securities were issued by U.S. Government agency and U.S. Government sponsored enterprises and have high credit ratings of “AA” grade or better. Interest on U.S. Government agency and U.S. Government sponsored enterprise investments have been paid as agreed, and management believes this will continue in the future and that the securities will be repaid in full as scheduled. Municipal securities that were in a continuous loss position for twelve months or longer had unrealized losses of $1.6 million at June 30, 2018 . The market value declines for these securities were primarily due to movements in interest rates and are not reflective of management’s expectations of the Company’s ability to fully recover these investments, which may be at maturity. For these reasons, no OTTI was recognized on U.S. Government sponsored collateralized mortgage obligations and mortgage backed securities, and municipal securities that were in an unrealized loss position at June 30, 2018 . The Company considers the losses on the investments in unrealized loss positions at June 30, 2018 to be temporary based on: 1) the likelihood of recovery; 2) the information relative to the extent and duration of the decline in market value; and 3) the Company’s intention not to sell, and management’s determination that it is more likely than not that the Company will not be required to sell a security in an unrealized loss position before recovery of its amortized cost basis.

Loans Receivable and Allowance

Loans Receivable and Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Loans Receivable and Allowance for Loan Losses	Loans Receivable and Allowance for Loan Losses The following is a summary of loans receivable by major category: June 30, 2018 December 31, 2017 (Dollars in thousands) Loan portfolio composition Real estate loans: Residential $ 45,383 $ 49,774 Commercial 8,165,420 8,142,036 Construction 301,937 316,412 Total real estate loans 8,512,740 8,508,222 Commercial business 2,131,301 1,780,869 Trade finance 156,181 166,664 Consumer and other 872,562 647,102 Total loans outstanding 11,672,784 11,102,857 Deferred loan fees, net (1,344 ) (282 ) Loans receivable 11,671,440 11,102,575 Allowance for loan losses (89,881 ) (84,541 ) Loans receivable, net of allowance for loan losses $ 11,581,559 $ 11,018,034 The loan portfolio is made up of four segments: real estate loans, commercial business, trade finance, and consumer and other. These segments are further segregated between loans accounted for under the amortized cost method (“Legacy Loans”) and previously acquired loans that were originally recorded at fair value with no carryover of the related pre-acquisition allowance for loan losses (“Acquired Loans”). Acquired Loans are further segregated between purchased credit impaired loans (loans with credit deterioration on the acquisition date and accounted for under ASC 310-30, or “PCI loans”) and Acquired Performing Loans (loans that were pass graded on the acquisition date and the fair value adjustment is amortized over the contractual life under ASC 310-20, or “non-PCI loans”). The following table presents changes in the accretable discount on the PCI loans for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (Dollars in thousands) Balance at beginning of period $ 54,846 $ 51,651 $ 55,002 $ 43,611 Accretion (5,959 ) (5,212 ) (11,731 ) (10,560 ) Reclassification from nonaccretable difference 4,686 7,218 10,302 20,606 Balance at end of period $ 53,573 $ 53,657 $ 53,573 $ 53,657 On the acquisition date, the amount by which the undiscounted expected cash flows exceed the estimated fair value of the PCI loans is the “accretable yield.” The accretable yield is then measured at each financial reporting date and represents the difference between the remaining undiscounted expected cash flows and the current carrying value of the loans. The accretable yield will change from period to period due to the following: 1) estimates of the remaining life of acquired loans will affect the amount of future interest income; 2) indices for variable rates of interest on PCI loans may change; and 3) estimates of the amount of the contractual principal and interest that will not be collected (nonaccretable difference) may change. The following tables detail the activity in the allowance for loan losses by portfolio segment for the three and six months ended June 30, 2018 and 2017 : Legacy Loans Acquired Loans Total Real Estate Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Three Months Ended June 30, 2018 Balance, beginning of period $ 45,977 $ 20,387 $ 1,767 $ 3,934 $ 13,048 $ 1,308 $ 38 $ 2 $ 86,461 Provision (credit) for loan losses 1,776 487 (796 ) 1,086 (141 ) (96 ) (35 ) 19 2,300 Loans charged off (144 ) (446 ) — (229 ) (92 ) (352 ) — — (1,263 ) Recoveries of charge offs 626 1,603 12 8 1 131 — 2 2,383 Balance, end of period $ 48,235 $ 22,031 $ 983 $ 4,799 $ 12,816 $ 991 $ 3 $ 23 $ 89,881 Six Months Ended June 30, 2018 Balance, beginning of period $ 45,360 $ 17,228 $ 1,674 $ 3,385 $ 13,322 $ 3,527 $ 42 $ 3 $ 84,541 Provision (credit) for loan losses 2,255 3,776 (715 ) 1,963 (314 ) (2,142 ) (39 ) 16 4,800 Loans charged off (207 ) (788 ) — (576 ) (194 ) (566 ) — — (2,331 ) Recoveries of charge offs 827 1,815 24 27 2 172 — 4 2,871 Balance, end of period $ 48,235 $ 22,031 $ 983 $ 4,799 $ 12,816 $ 991 $ 3 $ 23 $ 89,881 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Three Months Ended June 30, 2017 Balance, beginning of period $ 43,929 $ 17,479 $ 624 $ 2,022 $ 13,455 $ 944 $ 187 $ 19 $ 78,659 Provision (credit) for loan losses (2,596 ) 3,741 900 500 (69 ) 374 (81 ) (9 ) 2,760 Loans charged off (892 ) (425 ) (528 ) (241 ) 19 (55 ) — — (2,122 ) Recoveries of charge offs 37 700 4 1 6 28 — 1 777 Balance, end of period $ 40,478 $ 21,495 $ 1,000 $ 2,282 $ 13,411 $ 1,291 $ 106 $ 11 $ 80,074 Six Months Ended June 30, 2017 Balance, beginning of period $ 38,956 $ 23,430 $ 1,897 $ 2,116 $ 12,791 $ 117 $ — $ 36 $ 79,343 Provision (credit) for loan losses 3,510 857 1,203 684 906 1,122 106 (28 ) 8,360 Loans charged off (2,046 ) (3,615 ) (2,104 ) (520 ) (317 ) (125 ) — — (8,727 ) Recoveries of charge offs 58 823 4 2 31 177 — 3 1,098 Balance, end of period $ 40,478 $ 21,495 $ 1,000 $ 2,282 $ 13,411 $ 1,291 $ 106 $ 11 $ 80,074 The following tables break out the allowance for loan losses and the recorded investment of loans outstanding (not including accrued interest receivable and net deferred loan costs or fees by individually impaired, general valuation, and PCI impairment, by portfolio segment, at June 30, 2018 and December 31, 2017 : June 30, 2018 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 6,353 $ 3,169 $ 252 $ 15 $ 305 $ 511 $ — $ 1 $ 10,606 Collectively evaluated for impairment 41,882 18,862 731 4,784 1,145 480 3 22 67,909 PCI loans — — — — 11,366 — — — 11,366 Total $ 48,235 $ 22,031 $ 983 $ 4,799 $ 12,816 $ 991 $ 3 $ 23 $ 89,881 Loans outstanding: Individually evaluated for impairment $ 45,977 $ 30,151 $ 3,694 $ 851 $ 15,218 $ 16,800 $ 2,961 $ 2,111 $ 117,763 Collectively evaluated for impairment 6,446,113 1,939,901 149,012 717,591 1,857,454 118,508 514 143,156 11,372,249 PCI loans — — — — 147,978 25,941 — 8,853 182,772 Total $ 6,492,090 $ 1,970,052 $ 152,706 $ 718,442 $ 2,020,650 $ 161,249 $ 3,475 $ 154,120 $ 11,672,784 December 31, 2017 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 1,378 $ 2,807 $ 3 $ 35 $ 246 $ 854 $ — $ — $ 5,323 Collectively evaluated for impairment 43,982 14,421 1,671 3,350 1,036 2,673 42 3 67,178 PCI loans — — — — 12,040 — — — 12,040 Total $ 45,360 $ 17,228 $ 1,674 $ 3,385 $ 13,322 $ 3,527 $ 42 $ 3 $ 84,541 Loans outstanding: Individually evaluated for impairment $ 41,041 $ 31,322 $ 3,951 $ 908 $ 14,239 $ 18,733 $ 2,984 $ 1,171 $ 114,349 Collectively evaluated for impairment 6,172,448 1,459,273 152,204 477,375 2,120,001 244,980 7,525 157,794 10,791,600 PCI loans — — — — 160,493 26,561 — 9,854 196,908 Total $ 6,213,489 $ 1,490,595 $ 156,155 $ 478,283 $ 2,294,733 $ 290,274 $ 10,509 $ 168,819 $ 11,102,857 As of June 30, 2018 and December 31, 2017 , the reserve for unfunded loan commitments recorded in other liabilities was $786 thousand and $836 thousand , respectively. For the three months ended June 30, 2018 and 2017 , recognized provision for unfunded commitments recorded in credit related expense was $150 thousand and $201 thousand , respectively. For the six months ended June 30, 2018 and 2017 , the recognized (credit) provision for unfunded commitments was $(50) thousand and $442 thousand , respectively. The recorded investment of individually impaired loans and the total impaired loans net of specific allowance is presented in the following table: June 30, 2018 December 31, 2017 (Dollars in thousands) With allocated specific allowance Without charge off $ 48,192 $ 28,614 With charge off 1,188 3,044 With no allocated specific allowance Without charge off 61,806 77,533 With charge off 6,577 5,158 Specific allowance on impaired loans (10,606 ) (5,323 ) Impaired loans, net of specific allowance $ 107,157 $ 109,026 The following tables detail the recorded investment of impaired loans (Legacy Loans and Acquired Loans that became impaired subsequent to being originated and acquired, respectfully) as of June 30, 2018 and December 31, 2017 , and the average recorded investment and interest income recognized for the three and six months ended June 30, 2018 and 2017 . Impaired loans with no related allowance are believed by management to be adequately collateralized. As of June 30, 2018 As of December 31, 2017 Total Impaired Loans Recorded Investment* Unpaid Contractual Principal Balance Related Allowance Recorded Investment* Unpaid Contractual Principal Balance Related Allowance (Dollars in thousands) With related allowance: Real estate—residential $ 251 $ 251 $ 2 $ — $ — $ — Real estate—commercial Retail 7,790 8,027 5,662 532 531 131 Hotel & motel 2,758 3,055 860 2,931 5,090 284 Gas station & car wash — — — — — — Mixed use 3,012 3,071 15 312 958 4 Industrial & warehouse 2,855 3,688 103 772 1,482 96 Other 3,918 4,304 16 4,397 4,401 1,109 Real estate—construction — — — — — — Commercial business 24,098 25,806 3,680 18,330 22,757 3,661 Trade finance 3,694 3,694 252 3,861 3,861 3 Consumer and other 1,004 39 16 523 524 35 Subtotal $ 49,380 $ 51,935 $ 10,606 $ 31,658 $ 39,604 $ 5,323 With no related allowance: Real estate—residential $ — $ — $ — $ — $ — $ — Real estate—commercial Retail 7,867 10,855 — 11,792 13,923 — Hotel & motel 4,388 10,113 — 2,841 5,288 — Gas station & car wash 336 1,718 — 591 1,764 — Mixed use 3,847 6,001 — 1,101 3,490 — Industrial & warehouse 11,165 12,127 — 8,429 8,525 — Other 13,008 16,760 — 20,282 24,412 — Real estate—construction — — — 1,300 1,441 — Commercial business 22,853 27,248 — 31,725 33,207 — Trade finance 2,961 2,961 — 3,074 3,091 — Consumer and other 1,958 149 — 1,556 1,676 — Subtotal $ 68,383 $ 87,932 $ — $ 82,691 $ 96,817 $ — Total $ 117,763 $ 139,867 $ 10,606 $ 114,349 $ 136,421 $ 5,323 __________________________________ * Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. For the Three Months Ended June 30, For the Six Months Ended June 30, 2018 2017 2018 2017 Total Impaired Loans Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment (Dollars in thousands) With related allowance: Real estate—residential $ 125 $ — $ — $ — $ 84 $ — $ — $ — Real estate—commercial Retail 7,088 7 1,022 4 4,902 15 1,380 7 Hotel & motel 2,792 — 4,119 16 2,838 — 4,875 32 Gas station & car wash — — — — — — 72 — Mixed use 2,985 39 268 2 2,094 75 247 3 Industrial & warehouse 2,616 36 1,692 — 2,002 67 1,305 — Other 6,655 24 13,584 60 5,902 47 16,583 117 Real estate—construction — — — — — — — — Commercial business 27,487 168 23,154 233 24,435 331 24,284 456 Trade finance 3,146 63 2,018 106 3,384 121 2,049 157 Consumer and other 748 6 77 1 673 6 82 2 Subtotal $ 53,642 $ 343 $ 45,934 $ 422 $ 46,314 $ 662 $ 50,877 $ 774 With no related allowance: Real estate—residential $ — $ — $ 732 $ — $ — $ — $ 1,675 $ — Real estate—commercial Retail 10,917 36 13,214 82 11,209 71 13,060 161 Hotel & motel 3,713 — 9,545 — 3,423 — 8,404 — Gas station & car wash 542 — 3,633 — 558 — 4,103 — Mixed use 2,475 50 3,879 — 2,017 100 5,020 — Industrial & warehouse 11,886 56 8,612 58 10,733 112 8,965 116 Other 13,587 112 14,173 81 15,819 233 16,176 162 Real estate—construction 650 — 2,078 — 867 — 1,819 — Commercial business 20,530 37 9,953 41 19,752 63 9,527 83 Trade finance 3,165 47 2,298 2 3,134 90 2,838 3 Consumer and other 1,807 — 1,070 6 1,718 — 1,071 13 Subtotal $ 69,272 $ 338 $ 69,187 $ 270 $ 69,230 $ 669 $ 72,658 $ 538 Total $ 122,914 $ 681 $ 115,121 $ 692 $ 115,544 $ 1,331 $ 123,535 $ 1,312 __________________________________ * Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. As of June 30, 2018 As of December 31, 2017 Impaired Acquired Loans Recorded Investment* Unpaid Contractual Principal Balance Related Allowance Recorded Investment* Unpaid Contractual Principal Balance Related Allowance (Dollars in thousands) With related allowance: Real estate—residential $ 251 $ 251 $ 2 $ — $ — $ — Real estate—commercial Retail 1,093 1,106 182 262 261 126 Hotel & motel 73 345 8 85 86 2 Gas station & car wash — — — — — — Mixed use 2,839 2,839 14 129 129 1 Industrial & warehouse 268 1,090 96 221 896 96 Other 1,313 1,313 3 319 323 21 Real estate—construction — — — — — — Commercial business 4,653 5,584 511 1,987 2,903 854 Trade finance — — — — — — Consumer and other 153 — 1 — — — Subtotal $ 10,643 $ 12,528 $ 817 $ 3,003 $ 4,598 $ 1,100 With no related allowance: Real estate—residential $ — $ — $ — $ — $ — $ — Real estate—commercial Retail 2,918 3,657 — 3,412 4,099 — Hotel & motel 1,573 2,991 — 482 1,887 — Gas station & car wash 188 708 — 1 28 — Mixed use 71 1,967 — 152 2,240 — Industrial & warehouse 119 894 — 45 45 — Other 4,512 5,281 — 9,131 9,951 — Real estate—construction — — — — — — Commercial business 12,147 12,708 — 16,746 16,926 — Trade finance 2,961 2,961 — 2,984 3,001 — Consumer and other 1,958 149 — 1,171 1,291 — Subtotal $ 26,447 $ 31,316 $ — $ 34,124 $ 39,468 $ — Total $ 37,090 $ 43,844 $ 817 $ 37,127 $ 44,066 $ 1,100 __________________________________ * Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. For the Three Months Ended June 30, For the Six Months Ended June 30, 2018 2017 2018 2017 Impaired Acquired Loans Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment (Dollars in thousands) With related allowance: Real estate—residential $ 125 $ — $ — $ — $ 84 $ — $ — $ — Real estate—commercial Retail 800 — 753 4 621 — 1,110 7 Hotel & motel 79 — 176 — 81 — 117 — Gas station & car wash — — — — — — — — Mixed use 2,899 39 249 2 1,976 75 212 3 Industrial & warehouse 266 — 251 — 251 1 168 — Other 3,314 19 330 4 2,316 37 333 8 Real estate—construction — — — — — — — — Commercial business 8,243 41 744 — 6,158 80 594 — Trade finance — — — — — — — — Consumer and other 76 2 — — 51 2 — — Subtotal $ 15,802 $ 101 $ 2,503 $ 10 $ 11,538 $ 195 $ 2,534 $ 18 With no related allowance: Real estate—residential $ — $ — $ — $ — $ — $ — $ 226 $ — Real estate—commercial Retail 3,108 31 2,903 15 3,209 61 2,985 30 Hotel & motel 1,029 — 4,823 — 847 — 4,805 — Gas station & car wash 193 — 539 — 129 — 882 — Mixed use 36 — 2,664 — 74 — 3,548 — Industrial & warehouse 491 — 65 1 342 — 65 2 Other 4,475 60 2,931 8 6,027 117 3,961 16 Real estate—construction — — — — — — — — Commercial business 8,380 24 408 7 6,660 38 319 14 Trade finance 3,165 47 — — 3,104 90 — — Consumer and other 1,618 — 441 2 1,463 — 437 4 Subtotal $ 22,495 $ 162 $ 14,774 $ 33 $ 21,855 $ 306 $ 17,228 $ 66 Total $ 38,297 $ 263 $ 17,277 $ 43 $ 33,393 $ 501 $ 19,762 $ 84 __________________________________ * Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. Generally, loans are placed on nonaccrual status if the principal and/or interest payments become 90 days or more past due and/or management deems the collectability of the principal and/or interest to be in question, as well as when required by regulatory requirements. Loans to customers whose financial condition has deteriorated are considered for nonaccrual status whether or not the loan is 90 days or more past due. Generally, payments received on nonaccrual loans are recorded as principal reductions. Loans are returned to accrual status only when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. The Company did not recognize any cash basis interest income for the three and six months ended June 30, 2018 or 2017 . The following table represent the recorded investment in nonaccrual and loans past due over 90 days or more and still on accrual status by class of loans as of June 30, 2018 and December 31, 2017 . Nonaccrual Loans (1) Accruing Loans Past Due 90 or More Days June 30, 2018 December 31, 2017 June 30, 2018 December 31, 2017 (Dollars in thousands) Legacy Loans: Real estate—residential $ — $ — $ — $ — Real estate—commercial Retail 10,883 3,179 — — Hotel & motel 5,501 3,931 — — Gas station & car wash 149 590 2,564 — Mixed use 762 1,132 — — Industrial & warehouse 6,195 3,403 — — Other 6,581 5,689 — — Real estate—construction — 1,300 — — Commercial business 18,916 8,540 39 — Trade finance — — — — Consumer and other 481 471 427 407 Subtotal $ 49,468 $ 28,235 $ 3,030 $ 407 Acquired Loans: (2) Real estate—residential $ 251 $ — $ — $ — Real estate—commercial Retail 1,319 638 — — Hotel & motel 1,645 568 — — Gas station & car wash 188 1 — — Mixed use 71 152 — — Industrial & warehouse 363 221 — — Other 630 1,389 — — Real estate—construction — — — — Commercial business 12,333 14,560 — — Trade finance — — — — Consumer and other 1,958 1,011 — — Subtotal $ 18,758 $ 18,540 $ — $ — Total $ 68,226 $ 46,775 $ 3,030 $ 407 __________________________________ (1) Total nonaccrual loans exclude guaranteed portion of delinquent SBA loans that are in liquidation totaling $26.0 million and $22.1 million , at June 30, 2018 and December 31, 2017 , respectively. (2) Acquired Loans exclude PCI loans. The following tables present the recorded investment in past due loans, including nonaccrual loans, by the number of days past due as of June 30, 2018 and December 31, 2017 by class of loans: As of June 30, 2018 As of December 31, 2017 30-59 Past Due 60-89 Past Due 90 or More Past Due Total Past Due 30-59 60-89 90 or More Past Due Total (Dollars in thousands) Legacy Loans: Real estate—residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate—commercial Retail 810 1,262 827 2,899 3,239 — 285 3,524 Hotel & motel 2,493 3,534 2,464 8,491 1,884 1,172 2,635 5,691 Gas station & car wash — — 2,598 2,598 956 — 435 1,391 Mixed use — 189 590 779 129 — 952 1,081 Industrial & warehouse 118 1,115 2,472 3,705 1,121 99 2,473 3,693 Other 83 3,166 2,269 5,518 1,409 — 5,425 6,834 Real estate—construction — — — — — — 1,300 1,300 Commercial business 6,312 1,453 7,601 15,366 698 516 2,508 3,722 Trade finance 649 — — 649 — — — — Consumer and other 2,802 113 427 3,342 7,512 97 494 8,103 Subtotal $ 13,267 $ 10,832 $ 19,248 $ 43,347 $ 16,948 $ 1,884 $ 16,507 $ 35,339 Acquired Loans: (1) Real estate—residential $ — $ — $ 251 $ 251 $ — $ — $ — $ — Real estate—commercial Retail 33 — 868 901 81 216 386 683 Hotel & motel 4,098 — 73 4,171 — 1,219 — 1,219 Gas station & car wash 123 — 160 283 1,161 41 1 1,203 Mixed use — — 71 71 151 — 152 303 Industrial & warehouse — — 363 363 804 264 221 1,289 Other 906 — 148 1,054 275 — — 275 Real estate—construction — — — — — — — — Commercial business 214 136 1,061 1,411 1,088 256 885 2,229 Trade finance — — — — — — — — Consumer and other 1,826 — 432 2,258 957 270 181 1,408 Subtotal $ 7,200 $ 136 $ 3,427 $ 10,763 $ 4,517 $ 2,266 $ 1,826 $ 8,609 Total Past Due $ 20,467 $ 10,968 $ 22,675 $ 54,110 $ 21,465 $ 4,150 $ 18,333 $ 43,948 __________________________________ (1) Acquired Loans exclude PCI loans. Loans accounted for under ASC 310-30 are generally considered accruing and performing loans and the accretable discount is accreted to interest income over the estimated life of the loan when cash flows are reasonably estimable. Accordingly, PCI loans that are contractually past due are still considered to be accruing and performing loans. The loans may be classified as nonaccrual if the timing and amount of future cash flows is not reasonably estimable. The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, including, but not limited to, current financial information, historical payment experience, credit documentation, public information, and current economic trends. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis includes all non-homogeneous loans. Homogeneous loans are not risk rated and credit risk is analyzed largely by the number of days past due. This analysis is performed at least on a quarterly basis. The definitions for risk ratings are as follows: • Pass: Loans that meet a preponderance or more of the Company’s underwriting criteria and evidence an acceptable level of risk. • Special Mention: Loans that have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. • Substandard: Loans that are inadequately protected by the current net worth and paying capacity of the borrower or by the collateral pledged, if any. Loans in this classification have a well-defined weakness or weaknesses that jeopardize the repayment of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. • Doubtful: Loans that have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or repayment in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. The following tables present the recorded investment of risk ratings for Legacy and Acquired Loans as of June 30, 2018 and December 31, 2017 by class of loans: As of June 30, 2018 Pass/ Not Rated Special Mention Substandard Doubtful Total (Dollars in thousands) Legacy Loans: Real estate—residential $ 32,669 $ 519 $ 404 $ — $ 33,592 Real estate—commercial Retail 1,691,312 9,333 25,527 5,461 1,731,633 Hotel & motel 1,245,407 13,004 14,745 — 1,273,156 Gas station & car wash 774,954 5,686 2,916 — 783,556 Mixed use 456,488 6,971 6,279 — 469,738 Industrial & warehouse 625,276 13,527 29,909 — 668,712 Other 1,249,912 30,779 34,513 — 1,315,204 Real estate—construction 208,671 6,076 1,752 — 216,499 Commercial business 1,885,670 11,048 72,943 391 1,970,052 Trade finance 146,267 4,491 1,948 — 152,706 Consumer and other 717,590 1 851 — 718,442 Subtotal $ 9,034,216 $ 101,435 $ 191,787 $ 5,852 $ 9,333,290 Acquired Loans: Real estate—residential $ 11,283 $ — $ 508 $ — $ 11,791 Real estate—commercial Retail 549,238 2,567 18,392 — 570,197 Hotel & motel 247,404 3,254 22,879 — 273,537 Gas station & car wash 171,446 279 8,557 — 180,282 Mixed use 87,724 2,135 11,030 — 100,889 Industrial & warehouse 221,227 10,147 17,773 248 249,395 Other 508,871 13,623 26,627 — 549,121 Real estate—construction 81,051 4,387 — — 85,438 Commercial business 115,026 1,628 44,577 18 161,249 Trade finance 514 — 2,961 — 3,475 Consumer and other 147,619 39 6,309 153 154,120 Subtotal $ 2,141,403 $ 38,059 $ 159,613 $ 419 $ 2,339,494 Total $ 11,175,619 $ 139,494 $ 351,400 $ 6,271 $ 11,672,784 As of December 31, 2017 Pass/ Special Mention Substandard Doubtful Total (Dollars in thousands) Legacy Loans: Real estate—residential $ 33,557 $ 1,147 $ 1,439 $ — $ 36,143 Real estate—commercial Retail 1,640,809 32,723 17,856 — 1,691,388 Hotel & motel 1,224,597 19,358 8,877 — 1,252,832 Gas station & car wash 737,485 9,013 590 — 747,088 Mixed use 421,755 4,581 1,477 — 427,813 Industrial & warehouse 577,344 16,716 24,317 — 618,377 Other 1,133,188 30,030 53,995 — 1,217,213 Real estate—construction 219,583 — 3,052 — 222,635 Commercial business 1,389,043 35,640 65,912 — 1,490,595 Trade finance 152,583 2,200 1,372 — 156,155 Consumer and other 477,370 5 908 — 478,283 Subtotal $ 8,007,314 $ 151,413 $ 179,795 $ — $ 8,338,522 Acquired Loans: Real estate—residential $ 13,369 $ 262 $ — $ — $ 13,631 Real estate—commercial Retail 630,555 6,921 20,797 — 658,273 Hotel & motel 275,191 4,247 24,987 — 304,425 Gas station & car wash 194,063 2,872 8,992 — 205,927 Mixed use 94,864 5,725 14,738 — 115,327 Industrial & warehouse 250,049 14,973 16,358 265 281,645 Other 568,545 19,848 33,335 — 621,728 Real estate—construction 93,777 — — — 93,777 Commercial business 236,705 8,593 44,964 12 290,274 Trade finance 7,455 — 3,054 — 10,509 Consumer and other 162,495 37 6,202 85 168,819 Subtotal $ 2,527,068 $ 63,478 $ 173,427 $ 362 $ 2,764,335 Total $ 10,534,382 $ 214,891 $ 353,222 $ 362 $ 11,102,857 The Company may reclassify loans held for investment to loans held for sale in the event that the Company plans to sell loans that were originated with the intent to hold to maturity. Loans transferred from held to investment to held for sale are carried at the lower of cost or fair value. The breakdown of loans by type that were reclassified from held to investment to held for sale for the three and six months ended June 30, 2018 and 2017 is presented in the following table: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Transfer of loans receivable to held for sale (Dollars in thousands) Real estate - commercial $ — $ 2,671 $ — $ 11,370 Commercial business — 2,243 — 2,995 Consumer — 225 6,155 225 Total $ — $ 5,139 $ 6,155 $ 14,590 The adequacy of the allowance for loan losses is determined by management based upon an evaluation and review of the credit quality of the loan portfolio, consideration of historical loan loss experience, relevant internal and external factors that affect the collection of a loan, and other pertinent factors. Migration analysis is a formula methodology derived from the Bank’s actual historical net charge off experience for each loan class (type) or pool and risk grade. The migration analysis is centered on the Bank’s internal credit risk rating system. Management’s internal loan review and external contracted credit review examinations are used to determine and validate loan risk grades. This credit review system takes into consideration factors such as: borrower’s background and experience; historical and current financial condition; credit history and payment performance; economic conditions and their impact on various industries; type, fair value and volatility of the fair value of collateral; lien position; and the financial strength of any guarantors. A general loan loss allowance is provided on loans not specifically identified as impaired (“non-impaired loans”). The Bank’s general loan loss allowance has two components: quantitative and qualitative risk factors. The quantitative risk factors are based on the migration analysis methodology described above. The loans are classified by class and risk grade, and the historical loss migration is tracked for the various classes. Loss experience is quantified for a specified period and then weighted to place more significance on the most recent losses. That loss experience is then applied to the stratified portfolio at the end of each quarter. The Company utilizes nineteen non-homogeneous loan pools in the quantitative analysis process. The non-impaired commercial real estate loan portfolio is stratified into fourteen different loan pools based on property types and the non-impaired commercial and industrial loan portfolio is stratified into five different loan pools based on loan type in order to allocate historic loss experience to more granular loan pools. Additionally, in order to systematically quantify the credit risk impact of other trends and changes within the loan portfolio, the Bank utilizes qualitative adjustments to the migration analysis within established parameters. The parameters for making adjustments are established under a Credit Risk Matrix that provides seven possible scenarios for each of the factors below. The matrix allows for up to three positive (Major, Moderate, and Minor), three negative (Major, Moderate, and Minor), and one neutral credit risk scenarios within each factor for each loan type or pool. However, if information exists to warrant adjustment to the migration analysis, changes are made in accordance with the established parameters supported by narrative and/or statistical analysis. The Credit Risk Matrix and the nine possible scenarios enable the Bank to qualitatively adjust the Loss Migration Ratio by as much as 50 basis points in either direction (positive or negative) for each loan type pool. This matrix considers the following nine factors, which are patterned after the guidelines provided under the FFIEC Interagency Policy Statement on the Allowance for Loan and Lease Losses: • Changes in lending policies and procedures, including underwriting standards and collection, charge off, and recovery practices; • Changes in national and local economic and business conditions and developments, including the condition of various market segments; • Changes in the nature and volume of the loan portfolio; • Changes in the experience, ability and depth of lending management and staff; • Changes in the trends of the volume and severity of past due loans, classified loans, nonaccrual loans, troubled debt restructurings and other loan modifications; • Changes in the quality of the loan review system and the degree of oversight by the Directors; • Changes in the value of underlying collateral for collateral-dependent loans; • The existence and effect of any concentrations of credit and changes in the level of such concentrations; and • The effect of external factors, such as competition and legal and regulatory requirements, on the level of estimated losses in the loan portfolio. The Company also establishes specific loss allowances for loans that have identified potential credit risk conditions or circumstances related to a specific individual credit. The specific allowance amounts are determined in accordance with ASC 310-10-35-22, “Measurement of Impairment.” The loans identified as impaired will be accounted for in accordance with one of the three acceptable valuation methods: 1) the present value of future cash flows discounted at the loan’s effective interest rate; 2) the loan’s observable market price; or 3) the fair value of the collateral, if the loan is collateral dependent. For the collateral dependent impaired loans, management obtains a new appraisal to determine the amount of impairment as of the date that the loan became impaired. The appraisals are based on an “as is” valuation. To ensure that appraised values remain current, management either obtains updated appraisals every twelve months from a qualified independent appraiser or an internal evaluation of the collateral is performed by qualified personnel. If the third party market data indicates that the value of the collateral property has declined since the most recent valuation date, management adjusts the value of the property downward to reflect current market conditions. If the fair value of the collateral is less than the recorded amount of the loan, management recognizes impairment by creating or adjusting an existing valuation allowance with a corresponding charge to the provision for loan losses. If an impaired loan is expected to be collected through liquidation or operation of the underlying collateral, the loan is deemed to be collateral dependent and the amount of impairment is charged off against the allowance for loan losses. The Company considers a loan to be impaired when it is probable that not all amounts due (principal and interest) will be collectible in accordance with the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. The significance of payment delays and payment shortfalls is determined on a case-by-case basis by taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. For commercial business loans, real estate loans, and certain consumer loans, management bases the measurement of loan impairment o

Deposits

Deposits	6 Months Ended
	Jun. 30, 2018
Banking and Thrift [Abstract]
Deposits	Deposits The aggregate amount of time deposits in denominations of more than $250 thousand at June 30, 2018 and December 31, 2017 , was $1.54 billion and $1.28 billion , respectively. Included in time deposits of more than $250 thousand were $300.0 million in California State Treasurer’s deposits at June 30, 2018 and December 31, 2017 . The California State Treasurer’s deposits are subject to withdrawal based on the State’s periodic evaluations. The Company is required to pledge eligible collateral of at least 110% of outstanding deposits. At June 30, 2018 and December 31, 2017 , securities with carrying values of approximately $337.5 million and $337.7 million , respectively, were pledged as collateral for the California State Treasurer’s deposit. The Company also utilizes brokered deposits as a secondary source of funds. Total brokered deposits at June 30, 2018 and December 31, 2017 , totaled $1.20 billion and $797.0 million , respectively. Brokered deposits at June 30, 2018 consisted of $257.9 million in money market and NOW accounts and $938.9 million in time deposits accounts. Brokered deposits at December 31, 2017 consisted of $258.5 million in money market and NOW accounts and $538.5 million in time deposit accounts.

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Borrowings	Borrowings The Company maintains a line of credit with the Federal Home Loan Bank (“FHLB”) of San Francisco as a secondary source of funds. The borrowing capacity with the FHLB is limited to the lower of 25% of the Bank’s total assets or the Bank’s collateral capacity, which was $3.63 billion at June 30, 2018 , and $3.54 billion at December 31, 2017 . The terms of this credit facility require the Company to pledge eligible collateral with the FHLB equal to at least 100% of outstanding advances. At June 30, 2018 and December 31, 2017 , real estate secured loans with a carrying amount of approximately $5.82 billion and $4.91 billion , respectively, were pledged at the FHLB for outstanding advances and remaining borrowing capacity. At June 30, 2018 and December 31, 2017 , other than FHLB stock, no securities were pledged as collateral at FHLB. The purchase of FHLB stock is a prerequisite to become a member of the FHLB system, and the Company is required to own a certain amount of FHLB stock based on outstanding borrowings. At June 30, 2018 and December 31, 2017 , FHLB advances totaling $837.0 million and $1.16 billion , respectively, had weighted average effective interest rates of 1.76% and 1.63% , respectively. FHLB advances at June 30, 2018 and December 31, 2017 had various maturities through December 2022 . The effective interest rate of FHLB advances as of June 30, 2018 ranged between 1.06% and 2.39% . At June 30, 2018 , the Company’s remaining borrowing capacity with the FHLB was $2.76 billion . At December 31, 2017 , the Company also had $69.9 million in overnight federal funds purchased from lines at other banks. There were no federal funds purchased from other banks at June 30, 2018 . At June 30, 2018 , the contractual maturities for FHLB advances were as follows: June 30, 2018 Scheduled maturities in: (Dollars in thousands) 2018 $ 40,000 2019 320,000 2020 185,000 2021 145,000 2022 and thereafter 145,000 Premium on acquired advances - no maturity 1,994 Total Balance $ 836,994 As a member of the Federal Reserve Bank (“FRB”) system, the Bank may also borrow from the FRB of San Francisco. The maximum amount that the Bank may borrow from the FRB’s discount window is up to 95% of the fair market value of the qualifying loans and securities that are pledged. At June 30, 2018 , the outstanding principal balance of the qualifying loans pledged at the FRB was $791.5 million , and no investment securities were pledged. June 30, 2018 and December 31, 2017 , the total available borrowing capacity at the FRB discount window was $609.1 million and $564.6 million , respectively. There were no borrowings outstanding at the FRB discount window as of June 30, 2018 and December 31, 2017 .

Subordinated Debentures and Con

Subordinated Debentures and Convertible Notes	6 Months Ended
	Jun. 30, 2018
Subordinated Borrowings [Abstract]
Subordinated Debentures and Convertible Notes	Subordinated Debentures and Convertible Notes Subordinated Debt At June 30, 2018 , the Company had nine wholly owned subsidiary grantor trusts that had issued $126.0 million of pooled trust preferred securities. Trust preferred securities accrue and pay distributions periodically at specified annual rates as provided in the indentures. The trusts used the net proceeds from the offering to purchase a like amount of subordinated debentures (the “Debentures”). The Debentures are the sole assets of the trusts. The Company’s obligations under the subordinated debentures and related documents, taken together, constitute a full and unconditional guarantee by the Company of the obligations of the trusts. The trust preferred securities are mandatorily redeemable upon the maturity of the Debentures, or upon earlier redemption as provided in the indentures. The Company has the right to redeem the Debentures in whole (but not in part) on a quarterly basis at a redemption price specified in the indentures plus any accrued but unpaid interest to the redemption date. The Company also has a right to defer consecutive payments of interest on the debentures for up to five years. The following table is a summary of trust preferred securities and Debentures at June 30, 2018 : Issuance Trust Issuance Date Trust Preferred Security Amount Carrying Rate Type Current Rate Maturity Date (Dollars in thousands) Nara Capital Trust III 06/05/2003 $ 5,000 $ 5,155 Variable 5.49% 06/15/2033 Nara Statutory Trust IV 12/22/2003 5,000 5,155 Variable 5.20% 01/07/2034 Nara Statutory Trust V 12/17/2003 10,000 10,310 Variable 5.28% 12/17/2033 Nara Statutory Trust VI 03/22/2007 8,000 8,248 Variable 3.99% 06/15/2037 Center Capital Trust I 12/30/2003 18,000 13,924 Variable 5.20% 01/07/2034 Wilshire Statutory Trust II 03/17/2005 20,000 15,419 Variable 4.12% 03/17/2035 Wilshire Statutory Trust III 09/15/2005 15,000 10,857 Variable 3.74% 09/15/2035 Wilshire Statutory Trust IV 07/10/2007 25,000 17,618 Variable 3.72% 09/15/2037 Saehan Capital Trust I 03/30/2007 20,000 14,700 Variable 3.96% 06/30/2037 Total $ 126,000 $ 101,386 The Company’s investment in the common trust securities of the issuer trusts was $3.9 million at June 30, 2018 and is included in other assets. Although the subordinated debt issued by the trusts is not included as a component of stockholders’ equity in the consolidated statements of financial condition, the debt is treated as capital for regulatory purposes. The trust preferred security debt issuances are includable in Tier I capital up to a maximum of 25% of capital on an aggregate basis. Any amount that exceeds 25% qualifies as Tier 2 capital. Under the “Merger and Acquisition Transition Provisions” in BASEL III, if a depository institution holding company of $15 billion or more acquires a depository institution holding company with total consolidated assets of less than $15 billion as of December 31, 2009, the non-qualifying capital instruments of the resulting organization will be subject to a phase-out schedule. The phase-out schedule ended in 2016 and therefore in accordance with BASEL III, the Company’s subordinated debenture will no longer qualify for Tier 1 capital treatment once the Company exceeds total consolidated assets of $15 billion or more since the Company had acquisitions subsequent to December 31, 2009. The subordinated debentures will be still be eligible for Tier 2 inclusion once the Company exceeds $15 billion or more in total consolidated assets. Convertible Notes On May 11, 2018, the Company issued $200 million aggregate principal amount of 2.00% convertible senior notes maturing on May 15, 2038 in a private offering to qualified institutional investors under Rule 144A of the Securities Act of 1933. Subsequently on June 7, 2018, an additional $17.5 million in convertible notes were issued as part of the initial offering over-allotment option. In total, the Company issued $217.5 million in convertible notes during the second quarter of 2018. The convertible notes can be converted to the Company’s share of common stock at an initial rate of 45.0760 shares per $1,000 principal amount of the notes (equivalent to an initial conversion price of approximately $22.18 per share of common stock which represents a premium of 22.5% to the closing stock price on the date of the pricing of the notes). The convertible notes can be called by the Company, in part or in whole, on or after May 20, 2023 for 100% of the principal amount in cash. Holders of the convertible notes also have the option to repurchase or put the notes on May 15, 2023, May 15, 2028, or May 15, 2033 for 100% of the principal amount in cash. The convertible notes were issued as part of the Company’s plan to repurchase its common stock. On April 26, 2018, the Company’s Board of Directors approved a share repurchase program that authorized the Company to use up to $100.0 million of the proceeds from the convertible notes offering to repurchase its common stock. The net proceeds from the offering, after deducting the initial purchaser’s discount, was approximately $213.2 million . Of the total net proceeds, $113.2 million was down-streamed to the Bank as equity and the remaining $100.0 million was allocated for share repurchases. The Company used approximately $76.0 million of the allocated $100.0 million for share repurchases to repurchase shares of its common stock from purchasers of the convertible notes in privately negotiated transactions at a purchase price per share equal to the $18.11 per share closing price of the Company’s common stock. Subsequently, the Company repurchased additional shares of common stock on the open market. At June 30, 2018, total shares repurchased by the Company was $79.0 million , or 4.4 million shares at a weighted average price of $18.1032 . In accordance with accounting principles, the convertible notes issued by the Company were separated into a debt component and an equity component which represents the stock conversion option. The present value of the convertible notes was calculated based on a discount rate of 4.25% , which represented the current offering rate for similar types of debt without conversion options. The effective life of the convertible notes was estimated to be five years based on the first call and put date. The difference between the principal amount of the notes and the present value was recorded as the convertible note discount and additional paid-in capital. The issuance costs related to the offering were also allocated into a debt component to be capitalized, and an equity component in the same percentage allocation of debt and equity of the convertible note. The value of the convertible note at issuance and carrying value as of June 30, 2018 is presented below: As of June 30, 2018 Amortization/ Capitalization Period Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880 ) 518 (21,362 ) Issuance costs to be capitalized 5 years (4,119 ) 101 (4,018 ) Carrying balance of convertible notes $ 191,501 $ 619 $ 192,120 Interest expense on the convertible notes for the three and six months ended June 30, 2018 totaled $1.2 million . Interest expense for the Company’s convertible notes includes accrued interest on the convertible note coupon, non-cash interest expense representing the conversion option or note discount, and interest expense from capitalized issuance costs. Non-cash interest expense and issuance cost capitalization expense will only be recorded for the first five outstanding years of the convertible note. Subsequent to May 15, 2023, interest expense on the convertible note will consist of only accrued interest on the coupon.

Derivative Financial Instrument

Derivative Financial Instruments (Notes)	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company offers a loan hedging program to certain loan customers. Through this program, the Company originates a variable rate loan with the customer. The Company and the customer will then enter into a fixed interest rate swap. Lastly, an identical offsetting swap is entered into by the Company with a correspondent bank. These “back-to-back” swap arrangements are intended to offset each other and allow the Company to book a variable rate loan, while providing the customer with a contract for fixed interest payments. In these arrangements, the Company’s net cash flow is equal to the interest income received from the variable rate loan originated with the customer. These customer swaps are not designated as hedging instruments and are recorded at fair value in other assets and other liabilities. The changes in fair value is recognized in the income statement in other income and fees. At June 30, 2018 and December 31, 2017 , interest rate swaps related to the Company’s loan hedging program that were outstanding is presented in the following table: As of June 30, 2018 As of December 31, 2017 (Dollars in thousands) Interest rate swaps on loans with loan customers: Notional amount $ 298,082 $ 274,156 Weighted average remaining term 6.8 years 7.3 years Received fixed rate (weighted average) 4.41 % 4.34 % Pay variable rate (weighted average) 4.27 % 3.74 % Estimated fair value $ (10,534 ) $ (2,838 ) Back to back interest rate swaps with correspondent banks: Notional amount $ 298,082 $ 274,156 Weighted average remaining term 6.8 years 7.3 years Received variable rate (weighted average) 4.27 % 3.74 % Pay fixed rate (weighted average) 4.41 % 4.34 % Estimated fair value $ 10,534 $ 2,838 The Company enters into various stand-alone mortgage-banking derivatives in order to hedge the risk associated with the fluctuation of interest rates. Changes in fair value are recorded as mortgage banking revenue. Residential mortgage loans funded with interest rate lock commitments and forward commitments for the future delivery of mortgage loans to third party investors are considered derivatives. At June 30, 2018 , the Company had approximately $2.1 million in interest rate lock commitments and total forward sales commitments for the future delivery of residential mortgage loans. At December 31, 2017 , the Company had approximately $4.8 million in interest rate lock commitments and total forward sales commitments for the future delivery of residential mortgage loans. The following table reflects the notional amount and fair value of mortgage banking derivatives for the dates indicated: As of June 30, 2018 As of December 31, 2017 Notional Amount Fair Value Notional Amount Fair Value (Dollars in thousands) Assets: Interest rate lock commitments $ 2,107 $ 17 $ 4,795 $ 25 Forward sale contracts related to mortgage banking $ 882 $ 1 $ 2,452 $ 8 Liabilities: Interest rate lock commitments $ — $ — $ — $ — Forward sale contracts related to mortgage banking $ 1,225 $ (5 ) $ 2,343 $ 5

Commitments and contingencies

Commitments and contingencies	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the normal course of business, the Company is a party to financial instruments with off-balance sheet risk that are used to meet the financing needs of customers. These financial instruments include commitments to extend credit, standby letters of credit, commercial letters of credit, commitments to fund investments in affordable housing partnerships, mortgage derivatives, and operating lease commitments. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated statements of financial condition. The Company’s exposure to credit loss in the event of nonperformance on commitments to extend credit and standby letters of credit is represented by the contractual notional amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as the Company does for extending loan facilities to customers. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary upon extension of credit, is based on the Company’s credit evaluation of the counterparty. The types of collateral that the Company may hold can vary and may include accounts receivable, inventory, property, plant and equipment, and income-producing properties. Commitments at June 30, 2018 and December 31, 2017 are summarized as follows: June 30, 2018 December 31, 2017 (Dollars in thousands) Commitments to extend credit $ 1,676,694 $ 1,526,981 Standby letters of credit 77,758 74,748 Other letters of credit 125,630 74,147 Commitments to fund investments in affordable housing partnerships 38,056 38,467 Interest rate lock 2,107 4,795 Forward sale commitments 2,107 4,795 Operating lease commitments 69,304 66,698 In the normal course of business, the Company is involved in various legal claims. The Company has reviewed all legal claims against us with counsel and have taken into consideration the views of such counsel as to the potential outcome of the claims. Loss contingencies for all legal claims totaled $420 thousand at June 30, 2018 and $414 thousand at December 31, 2017 . It is reasonably possible the Company may incur losses in addition to the amounts currently accrued. However, at this time, the Company is unable to estimate the range of additional losses that are reasonably possible because of a number of factors, including the fact that certain of these litigation matters are still in their early stages and involve claims that the Company believes have little to no merit. Management has considered these and other possible loss contingencies and does not expect the amounts to be material to the consolidated financial statements.

Goodwill, Intangible Assets, an

Goodwill, Intangible Assets, and Servicing Assets	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Intangible Assets, and Servicing Assets	Goodwill, Intangible Assets, and Servicing Assets Goodwill represents the excess of the purchase price over the sum of the estimated fair values of the tangible and identifiable intangible assets acquired less the estimated fair value of the liabilities assumed. Goodwill has an indefinite useful life and is evaluated for impairment annually or more frequently if events and circumstances indicate that the asset might be impaired. An impairment loss is recognized to the extent that the carrying amount exceeds the asset’s fair value. At December 31, 2017, management assessed the qualitative factors related to intangible assets and goodwill and for the year to determine whether it was more-likely-than-not that the fair value was less than its carrying amount. Based on the analysis of these factors, management determined that it was more-likely-than-not that intangible assets were not impaired and that the fair value of goodwill exceeded the carrying value and that the two-step goodwill impairment test was not needed. Goodwill is not amortized for book purposes and is not tax deductible. The carrying amount of the Company’s goodwill as of June 30, 2018 and December 31, 2017 was $464.5 million . There was no impairment of goodwill during the three and six months ended June 30, 2018 . Core deposit intangible assets are amortized over their estimated lives, which range from seven to ten years. Amortization expense related to core deposit intangible assets totaled $615 thousand and $676 thousand for the three months ended June 30, 2018 and 2017 , respectively. The amortization expense related to core deposit intangible assets totaled $1.2 million and $1.4 million for the six months ended June 30, 2018 and 2017 , respectively. The following table provides information regarding the core deposit intangibles at June 30, 2018 : As of June 30, 2018 Core Deposit Intangibles Related To: Amortization Period Gross Carrying Amount Accumulated Amortization Carrying Amount (Dollars in thousands) Center Financial acquisition 7 years $ 4,100 $ (4,033 ) $ 67 Pacific International Bank acquisition 7 years 604 (556 ) 48 Foster Bankshares acquisition 10 years 2,763 (1,765 ) 998 Wilshire Bancorp acquisition 10 years 18,138 (3,959 ) 14,179 Total $ 25,605 $ (10,313 ) $ 15,292 Servicing assets are recognized when SBA and residential mortgage loans are sold with servicing retained with the income statement effect recorded in gains on sales of loans. Servicing assets are initially recorded at fair value based on the present value of the contractually specified servicing fee, net of servicing costs, over the estimated life of the loan, using a discount rate. The Company’s servicing costs approximates the industry average servicing costs of 40 basis points. All classes of servicing assets are subsequently measured using the amortization method which requires servicing rights to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Management periodically evaluates servicing assets for impairment based upon the fair value of the rights as compared to the carrying amount. Impairment is determined by stratifying rights into groupings based on loan type. Impairment is recognized through a valuation allowance for an individual grouping, to the extent that fair value is less than the carrying amount. As of June 30, 2018 and December 31, 2017 , the Company did not have a valuation allowance for servicing assets. The changes in servicing assets for the three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (Dollars in thousands) Balance at beginning of period $ 24,866 $ 25,941 $ 24,710 $ 26,457 Additions through originations of servicing assets 1,600 1,316 3,316 2,612 Amortization (2,086 ) (1,919 ) (3,646 ) (3,731 ) Adjustments 670 — 670 — Balance at end of period $ 25,050 $ 25,338 $ 25,050 $ 25,338 Loans serviced for others are not reported as assets. The principal balances of loans serviced for other institutions were $1.54 billion as of June 30, 2018 and $1.51 billion as of December 31, 2017 . The Company utilizes the discounted cash flow method to calculate the initial excess servicing assets. The inputs used in evaluating servicing assets for impairment at June 30, 2018 and December 31, 2017 are presented below. June 30, 2018 December 31, 2017 SBA Servicing Assets: Weighted-average discount rate 12.09% 11.13% Constant prepayment rate 9.99% 8.38% Mortgage Servicing Assets: Weighted-average discount rate 10.13% 9.63% Constant prepayment rate 7.65% 9.05%

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended June 30, 2018 , the Company had an income tax provision totaling $16.6 million on pretax income of $64.2 million , representing an effective tax rate of 25.92% , compared with an income tax provision of $25.5 million on pretax income of $66.1 million , representing an effective tax rate of 38.48% for the three months ended June 30, 2017 . For the six months ended June 30, 2018 , the Company had an income tax provision totaling $34.4 million on pretax income of $133.1 million , representing an effective tax rate of 25.81% , compared with an income tax provision of $48.5 million on pretax income of $125.3 million , representing an effective tax rate of 38.65% for the six months ended June 30, 2017 . The reduction in effective tax rate for periods in 2018 compared to periods 2017 was primarily due to the reduction of federal income tax rate from 35% to 21% under comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (“Tax Act”) effective as of December 22, 2017, but the increase in affordable housing partnership investment tax credits for the three and six months ended June 30, 2018 compared to the three and six months ended June 30, 2017 , also contributed to the decline in the tax rate. As of June 30, 2018 , the Company has not yet completed accounting for the enactment of the Tax Act; however, the Company believes it has reasonably estimated the effects of the Tax Act by recording an income tax expense of $25.4 million for the year ended December 31, 2017 in accordance with SEC Staff Accounting Bulletin No. 118 (“SAB 118”). As required by SAB 118, the Company will continue to evaluate and re-measure the impact of the Tax Act on deferred tax amounts that existed at December 31, 2017 and record appropriate income tax provision amounts in 2018. As a result of this process, through the second quarter of 2018, the Company recorded an additional income tax provision expense of $16 thousand for the six months ended June 30, 2018 . The Company and its subsidiaries are subject to U.S. federal income tax, as well as state income taxes. The Company had total unrecognized tax benefits of $2.4 million at June 30, 2018 and $2.1 million at December 31, 2017 , that relate to uncertainties associated with federal and state income tax matters. The Company recognizes interest and penalties on income tax matters in income tax expense. The Company recorded approximately $438 thousand and $348 thousand , for accrued interest ( no portion was related to penalties) at June 30, 2018 and December 31, 2017 , respectively. Management believes it is reasonably possible that the unrecognized tax benefits may decrease by $2.4 million in the next twelve months due to a settlement with the state tax authorities. The statute of limitations for the assessment of income taxes related to the consolidated federal income tax returns is closed for all tax years up to and including 2013. The expiration of the statute of limitations for the assessment of income and franchise taxes related to the various state income and franchise tax returns varies by state. The Company is currently under examination by the California Franchise Tax Board (FTB) for the 2011, 2012 and 2013 tax years and by the New York State Department of Taxation and Finance for the 2013, 2014, and 2015 tax years. Wilshire Bancorp, Inc., an acquired entity, is currently under examination by the FTB for the 2011, 2012, and 2013 tax years. While the outcome of the examinations is unknown, the Company expects no material adjustments. Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities (without regard to certain changes to deferred taxes). Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion, or all, of the deferred tax asset will not be realized. In assessing the realization of deferred tax assets, management evaluates both positive and negative evidence, including the existence of any cumulative losses in the current year and the prior two years, the amount of taxes paid in available carry-back years, the forecasts of future income, applicable tax planning strategies, and assessments of current and future economic and business conditions. This analysis is updated quarterly and adjusted as necessary. Based on the analysis, the Company has determined that a valuation allowance for deferred tax assets was not required as of June 30, 2018 .

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair value. The fair value inputs of the instruments are classified and disclosed in one of the following categories pursuant to ASC 820: Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. The quoted price shall not be adjusted for any blockage factor (i.e., size of the position relative to trading volume). Level 2 - Pricing inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Fair value is determined through the use of models or other valuation methodologies, including the use of pricing matrices. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 3 - Pricing inputs are unobservable for the asset or liability. Unobservable inputs are used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date. The inputs into the determination of fair value require significant management judgment or estimation. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an asset’s or liability’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. The Company uses the following methods and assumptions in estimating fair value disclosures for financial instruments. Financial assets and liabilities recorded at fair value on a recurring and non-recurring basis are listed as follows: Securities Available for Sale The fair values of securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs). The fair values of the Company’s Level 3 securities available for sale were measured using an income approach valuation technique. The primary inputs and assumptions used in the fair value measurement were derived from the securities’ underlying collateral, which included discount rates, prepayment speeds, payment delays, and an assessment of the risk of default of the underlying collateral, among other factors. Significant increases or decreases in any of the inputs or assumptions would result in a significant increase or decrease in the fair value measurement. Equity Investments With Readily Determinable Fair Value The fair value of our equity investments with readily determinable fair value is comprised of mutual funds and equity stock. The fair value for these investments is obtained from unadjusted quoted prices in active markets on the date of measurement and is therefore classified as Level 1. Interest Rate Swaps The Company offers interest rate swaps to certain loan customers to allow them to hedge the risk of rising interest rates on their variable rate loans. The Company originates a variable rate loan and enters into a variable-to-fixed interest rate swap with the customer. The Company also enters into an offsetting swap with a correspondent bank. These back-to-back agreements are intended to offset each other and allow the Company to originate a variable rate loan, while providing a contract for fixed interest payments for the customer. The net cash flow for the Company is equal to the interest income received from a variable rate loan originated with the customer. The fair value of these derivatives is based on a discounted cash flow approach. Due to the observable nature of the inputs used in deriving the fair value of these derivative contracts, the valuation of interest rate swaps is classified as Level 2. Mortgage banking derivatives Mortgage banking derivative instruments consist of interest rate lock commitments and forward sale contracts that trade in liquid markets. The fair value is based on the prices available from third party investors. Due to the observable nature of the inputs used in deriving the fair value, the valuation of mortgage banking derivatives are classified as Level 2. Impaired Loans The fair values of impaired loans are generally measured for impairment using the practical expedients permitted by FASB ASC 310-10-35 including impaired loans measured at an observable market price (if available), or at the fair value of the loan’s collateral (if the loan is collateral dependent). Fair value of the loan’s collateral, when the loan is dependent on collateral, is determined by appraisals or independent valuation, less costs to sell of 8.5% . For commercial and industrial and asset backed loans, independent valuations may be comprised of a 20 - 60% discount for eligible accounts receivable and a 50 - 70% discount for inventory. These result in a Level 3 classification. OREO OREO is fair valued at the time the loan is foreclosed upon and the asset is transferred to OREO. The value is based primarily on third party appraisals, less costs to sell of 8.5% and result in a Level 3 classification of the inputs for determining fair value. OREO is reviewed and evaluated on at least a quarterly basis for additional impairment and adjusted to lower of cost or market accordingly, based on the same factors identified above. Loans held for sale Loans held for sale are carried at the lower of cost or fair value, as determined by outstanding commitments from investors, or based on recent comparable sales (Level 2 inputs), if available, and if not available, are based on discounted cash flows using current market rates applied to the estimated life and credit risk (Level 3 inputs) or may be assessed based upon the fair value of the collateral, which is obtained from recent real estate appraisals (Level 3 inputs). These appraisals may utilize a single valuation approach or a combination of approaches including the income approach. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are typically significant and result in Level 3 classification of the inputs for determining fair value. Assets and liabilities measured at fair value on a recurring basis are summarized below: Fair Value Measurements at the End of June 30, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 897,087 $ — $ 897,087 $ — Mortgage-backed securities: — — Residential 434,595 — 434,595 — Commercial 420,271 — 420,271 — Corporate securities 4,405 — 4,405 — Municipal securities 78,748 — 77,683 1,065 Equity investments with readily determinable fair value 25,475 25,475 — — Mutual funds — — — — Interest rate swaps (10,534 ) — (10,534 ) — Mortgage banking derivatives 18 — 18 — Liabilities: Interest rate swaps (10,534 ) — (10,534 ) — Mortgage banking derivatives 5 — 5 — Fair Value Measurements at the End of the Reporting Period Using December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 838,709 $ — $ 838,709 $ — Mortgage-backed securities: Residential 471,214 — 471,214 — Commercial 301,365 — 301,365 — Corporate securities 4,475 — 4,475 — Municipal securities 82,537 — 81,429 1,108 Mutual funds 21,957 21,957 — — Interest rate swaps (2,838 ) — (2,838 ) — Mortgage banking derivatives 33 — 33 — Liabilities: Interest rate swaps (2,838 ) — (2,838 ) — Mortgage banking derivatives 5 — 5 — There were no transfers between Level 1, 2, and 3 during the three and six months ended June 30, 2018 and 2017 . The table below presents a reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (Dollars in thousands) Beginning Balance $ 1,079 $ 1,128 $ 1,108 $ 1,139 Total losses included in other comprehensive income (14 ) (1 ) (43 ) (12 ) Ending Balance $ 1,065 $ 1,127 $ 1,065 $ 1,127 The Company measures certain assets at fair value on a non-recurring basis including impaired loans (excluding PCI loans), loans held for sale, and OREO. These fair value adjustments result from impairments recognized during the period, application of the lower of cost or fair value on loans held for sale, and the application of fair value less cost to sell on OREO. Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at the End of the Reporting Period Using June 30, 2018 Quoted Prices Significant Significant (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 13,660 $ — $ — $ 13,660 Commercial business 8,011 — — 8,011 Trade finance 3,594 — — 3,594 Consumer 66 — — 66 OREO 3,741 — — 3,741 Fair Value Measurements at the End of the Reporting Period Using December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 6,086 $ — $ — $ 6,086 Commercial business 3,320 — — 3,320 Consumer 84 — — 84 OREO 5,615 — — 5,615 For assets measured at fair value on a non-recurring basis, the total net gains (losses), which include charge offs, recoveries, specific reserves, and recognized gains and losses on sales are summarized below: For the Three Months Ended June 30, For the Six Months Ended June 30, 2018 2017 2018 2017 (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 966 $ (433 ) $ (4,606 ) $ (2,435 ) Commercial business 1,513 (4,027 ) 614 (5,001 ) Trade Finance (240 ) (527 ) (225 ) (1,239 ) Consumer 448 (229 ) (763 ) (495 ) Loans held for sale, net — 353 — 772 OREO 192 (733 ) 264 (1,328 ) Fair Value of Financial Instruments Carrying amounts and estimated fair values of financial instruments, not previously presented, at June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 Carrying Estimated Fair Value Measurement Using (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 466,364 $ 466,364 Level 1 Interest bearing deposits in other financial institutions and other investments 77,817 77,748 Level 2/3 Loans held for sale 26,866 28,781 Level 2 Loans receivable—net 11,581,559 11,521,742 Level 3 FHLB stock 26,947 N/A N/A Accrued interest receivable 30,954 30,954 Level 2/3 Servicing assets, net 25,050 25,814 Level 3 Customers’ liabilities on acceptances 868 868 Level 2 Financial Liabilities: Noninterest bearing deposits $ 3,038,265 $ 3,038,265 Level 2 Saving and other interest bearing demand deposits 3,512,388 3,512,388 Level 2 Time deposits 5,183,942 5,200,868 Level 2 FHLB advances 836,994 834,919 Level 2 Convertible notes, net 192,120 214,429 Level 1 Subordinated debentures 101,386 117,435 Level 2 Accrued interest payable 24,594 24,594 Level 2 Acceptances outstanding 868 868 Level 2 December 31, 2017 Carrying Estimated Fair Value Measurement Using (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 492,000 $ 492,000 Level 1 Interest bearing deposits in other financial institutions and other investments 53,366 52,960 Level 2/3 Loans held for sale 29,661 32,048 Level 2 Loans receivable—net 11,018,034 11,112,179 Level 3 FHLB stock 29,776 N/A N/A Accrued interest receivable 29,979 29,979 Level 2/3 Servicing assets, net 24,710 27,511 Level 3 Customers’ liabilities on acceptances 1,691 1,691 Level 2 Financial Liabilities: Noninterest bearing deposits $ 2,998,734 $ 2,998,734 Level 2 Saving and other interest bearing demand deposits 3,573,212 3,573,212 Level 2 Time deposits 4,274,663 4,263,585 Level 2 FHLB advances 1,157,693 1,220,529 Level 2 Federal funds purchased 69,900 69,900 Level 2 Subordinated debentures 100,853 100,853 Level 2 Accrued interest payable 15,961 15,961 Level 2 Acceptances outstanding 1,691 1,691 Level 2 During the first quarter of 2018, the Company adopted ASU 2016-01, “ Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities .” Among other things, the guidance requires the Company to base their fair value disclosures for financial instruments that are not measured at fair value in the financial statements on the exit price notion as opposed to an entry pricing notion. As of December 31, 2017, the Company used the entry prices to measure the fair value of certain assets and liabilities including loans, deposits, and subordinated debentures as permitted by ASC 820-10. However, upon adoption of ASU 2016-01, the Company began measuring these assets and liabilities based on the exit price notion. Although the exit price notion represents the value that would be received to sell an asset or paid to transfer a liability, the actual price received for a sale of assets or paid to transfer liabilities could be different from exit price disclosed. The methods and assumptions used to estimate fair value are described as follows: The carrying amount is the estimated fair value for cash and cash equivalents, savings and other interest bearing demand deposits, customer’s and Bank’s liabilities on acceptances, noninterest bearing deposits, short-term debt, secured borrowings and variable rate loans or deposits that reprice frequently and fully. For loans the fair value is determined through a discounted cash flow analysis which incorporates probability of default and loss given default rates on an individual loan basis. The discount rate is based on the LIBOR Swap Rate for fixed rate loans, while variable loans start with the corresponding index rate and an adjustment was made on certain loans which considered factors such as servicing costs, capital charges, duration, asset type incremental costs, and use of projected cash flows. Residential real estate loans fair values included Fannie Mae and Freddie Mac prepayment speed assumptions or a third party index based on historical prepayment speeds. Fair value of time deposits is based discounted cash flow analysis using recent issuance rates over the prior three months and a market rate analysis of recent offering rates for retail products. Wholesale time deposits fair values incorporated brokered time deposit offering rates. The fair value of the Company’s debt is based on current rates for similar financing. Fair value for the Company’s convertible notes is based on the actual last traded price of the notes. It was not practicable to determine the fair value of FRB stock or FHLB stock due to restrictions placed on their transferability. The fair value of commitments to fund loans represents fees currently charged to enter into similar agreements with similar remaining maturities and is not presented herein. The fair value of these financial instruments is not material to the consolidated financial statements.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Stockholders’ Equity	Stockholders’ Equity Total stockholders’ equity at June 30, 2018 was $1.91 billion , compared to $1.93 billion at December 31, 2017 . The Company assumed certain warrants (related to the TARP Capital Purchase Plan) to purchase shares of the Company’s common stock. On May 20, 2015, the U.S. Treasury Department completed an auction to sell certain warrant positions, and the Company submitted the winning bid to repurchase an outstanding warrant to purchase 350,767 shares of the Company’s common stock. The Company repurchased this warrant for $1.2 million . As of June 30, 2018 , the U.S. Treasury Department held one remaining warrant for the purchase of 20,673 shares of the Company’s common stock. During the second quarter of 2018, the Company recorded $21.4 million in additional paid-in capital from the convertible notes issued. The $21.4 million included $21.9 million for the equity component of the convertible notes offset by $461 thousand in issuance costs from the convertible notes that was allocated to equity. The Company also recorded a tax adjustment on the equity component of the convertible notes reducing additional paid-in capital by $6.4 million . On April 26, 2018, the Company’s Board of Directors approved a share repurchase program that authorized the Company to repurchase up to $100.0 million in common stock. During the second quarter of 2018, the Company repurchased 4.4 million shares of common stock which was recorded as treasury stock totaling $79.0 million . This led to a decline in stockholders’ equity at June 30, 2018 compared to December 31, 2017 . The Company paid a quarterly dividend of $0.13 per common share for the second quarter of 2018 compared to $0.12 per common share for the second quarter of 2017 . For the six months ended June 30, 2018 and 2017 , the Company paid total dividends of $0.26 and $0.24 per common share, respectively. The following table presents the quarterly changes to accumulated other comprehensive (loss) income for the three and six months ended June 30, 2018 and June 30, 2017 : Three Months Ended, June 30, 2018 June 30, 2017 (Dollars in thousands) Balance at beginning of period $ (38,640 ) $ (12,849 ) Unrealized loss on securities available for sale and interest only strips (9,249 ) 4,776 Tax effect 2,767 (2,016 ) Total other comprehensive (loss) income $ (6,482 ) $ 2,760 Balance at end of period $ (45,122 ) $ (10,089 ) Six Months Ended, June 30, 2018 June 30, 2017 (Dollars in thousands) Balance at beginning of period $ (21,781 ) $ (14,657 ) Unrealized gains on securities available for sale and interest only strips (33,898 ) 7,908 Tax effect 10,276 (3,340 ) Total other comprehensive (loss) income $ (23,622 ) $ 4,568 Reclassification to retained earnings per ASU 2016-01 281 — Balance at end of period $ (45,122 ) $ (10,089 ) During the first quarter of 2018, the Company adopted ASU 2016-01 “ Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities.” As a result of the adoption of ASU 2016-01, the Company no longer accounts for mutual funds as available-for-sale securities and accounts for these investments as equity investments with changes to fair value recorded through earnings. In accordance with ASU 2016-01, the Company reclassified $281 thousand in net unrealized losses included in other comprehensive income, net of taxes, at December 31, 2017 to retained earnings on January 1, 2018. For the three and six months ended and June 30, 2018 and 2017 , there were no other reclassifications out of accumulated other comprehensive (loss) income.

Regulatory Matters

Regulatory Matters	6 Months Ended
	Jun. 30, 2018
Banking and Thrift [Abstract]
Regulatory Matters	Regulatory Matters The Company and the Bank are subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a material and adverse effect on the Company’s and the Bank’s business, financial condition and results of operation, such as restrictions on growth or the payment of dividends or other capital distributions or management fees. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. In July, 2013, the federal bank regulatory agencies adopted final regulations, which revised their risk-based and leverage capital requirements for banking organizations to meet requirements of Dodd-Frank and to implement Basel III international agreements reached by the Basel Committee. The final rules began for the Company and the Bank on January 1, 2015 and are subject to a phase-in period through January 1, 2019. The final rules that had an impact on the Company and the Bank include: • An increase in the minimum Tier 1 capital ratio from 4.00% to 6.00% of risk-weighted assets; • A new category and a required 4.50% of risk-weighted assets ratio is established for “Common Equity Tier 1” as a subset of Tier 1 capital limited to common equity; • A minimum non-risk-based leverage ratio is set at 4.00%, eliminating a 3.00% exception for higher rated banks; • Changes in the permitted composition of Tier 1 capital to exclude trust preferred securities, mortgage servicing rights and certain deferred tax assets and include unrealized gains and losses on available for sale debt and equity securities; • The risk-weights of certain assets for purposes of calculating the risk-based capital ratios are changed for high volatility commercial real estate acquisition, development and construction loans, certain past due non-residential mortgage loans and certain mortgage-backed and other securities exposures; and • A new additional capital conservation buffer of 2.5% of risk weighted assets over each of the required capital ratios is being phased in from 2016 to 2019 and must be met to avoid limitations on the ability of the B ank to pay dividends, repurchase shares, or pay discretionary bonuses. The capital conservation buffer for the Company was initially 0.625% in 2016, and increases 0.625% annually until 2019. As of June 30, 2018 , the capital conservation buffer for the Company stood at 1.875%. As of June 30, 2018 , the ratios for the Company and the Bank were sufficient to meet the fully phased-in conservation buffer. As of June 30, 2018 and December 31, 2017 , the most recent regulatory notification categorized the Bank as “well-capitalized” under the regulatory framework for prompt corrective action. To generally be categorized as “well-capitalized”, the Bank must maintain minimum total risk-based, Tier I risk-based, common equity Tier 1, and Tier I leverage ratios as set forth in the following table. There are no conditions or events since the most recent notification from regulators that management believes has changed the institution’s category. The Company’s and the Bank’s capital amounts and ratios are presented in the table below for the dates indicated: Actual Required Minimum Capital Adequacy With Capital Conservation Buffer Required Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of June 30, 2018 Common equity Tier 1 capital (to risk weighted assets): Company $ 1,470,620 11.74 % $ 563,726 4.50 % $ 798,612 6.375 % N/A N/A Bank $ 1,727,710 13.79 % $ 563,692 4.50 % $ 798,563 6.375 % $ 814,221 6.50 % Total capital (to risk-weighted assets): Company $ 1,658,771 13.24 % $ 1,002,180 8.00 % $ 1,237,066 9.875 % N/A N/A Bank $ 1,818,376 14.52 % $ 1,002,119 8.00 % $ 1,236,990 9.875 % $ 1,252,648 10.00 % Tier I capital (to risk-weighted assets): Company $ 1,568,105 12.52 % $ 751,635 6.00 % $ 986,521 7.875 % N/A N/A Bank $ 1,727,710 13.79 % $ 751,589 6.00 % $ 798,563 7.875 % $ 1,002,119 8.00 % Tier I capital (to average assets): Company $ 1,568,105 11.06 % $ 567,163 4.00 % N/A N/A N/A N/A Bank $ 1,727,710 12.21 % $ 565,851 4.00 % N/A N/A $ 707,314 5.00 % Actual Required Minimum Capital Adequacy With Capital Conservation Buffer Required Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of December 31, 2017 Common equity Tier 1 capital (to risk weighted assets): Company $ 1,471,193 12.30 % $ 538,435 4.50 % $ 688,000 5.75 % N/A N/A Bank $ 1,548,401 12.95 % $ 538,178 4.50 % $ 687,672 5.75 % $ 777,368 6.50 % Total capital (to risk-weighted assets): Company $ 1,653,521 13.82 % $ 957,217 8.00 % $ 1,106,782 9.25 % N/A N/A Bank $ 1,633,778 13.66 % $ 956,761 8.00 % $ 1,106,255 9.25 % $ 1,195,951 10.00 % Tier I capital (to risk-weighted assets): Company $ 1,568,144 13.11 % $ 717,913 6.00 % $ 867,478 7.25 % N/A N/A Bank $ 1,548,401 12.95 % $ 717,571 6.00 % $ 687,672 7.25 % $ 956,761 8.00 % Tier I capital (to average assets): Company $ 1,568,144 11.54 % $ 543,528 4.00 % N/A N/A N/A N/A Bank $ 1,548,401 11.40 % $ 543,441 4.00 % N/A N/A $ 679,301 5.00 %

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition On January 1, 2018, the Company adopted ASU No. 2014-09 “ Revenue from Contracts with Customers ” (Topic 606) and all subsequent issued ASUs that are related to Topic 606. The implementation of the new standard did not have a material impact on the measurement or recognition of revenue; as such, a cumulative effect adjustment to opening retained earnings was not deemed necessary. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period results were not adjusted and continue to be reported in accordance with previous accounting guidance under Topic 605. Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities. In addition, certain noninterest income streams such as fees associated with mortgage servicing rights, financial guarantees, derivatives, and certain credit card fees are also out of scope of the new guidance. Topic 606 is applicable to noninterest revenue streams such as deposit related fees, wire transfer fees, and OREO related net gains or expenses. However, the recognition of these revenue streams did not change significantly upon adoption of Topic 606. Noninterest revenue streams in-scope of Topic 606 are discussed below. Service Charges on Deposit Accounts and Wire Transfer Fees Service charges on noninterest and interest bearing deposit accounts consist of monthly service charges, customer analysis charges, non-sufficient funds (“NSF”) charges, other deposit account related charges, and wire transfer fees. The Company’s performance obligation for account analysis charges and monthly service charges is generally satisfied, and the related revenue recognized, over the period in which the service is provided. NSF charges and other deposit account related charges are largely transactional based, and therefore, the Company’s performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Service charges on deposit accounts and wire transfers are summarized below: Three Months Ended June 30, Six Months Ended June 30 2018 2017 2018 2017 (Dollars in thousands) Noninterest bearing deposit account income: Monthly service charges $ 446 $ 444 $ 885 $ 908 Customer analysis charges 2,036 2,164 4,060 4,344 NSF charges 1,895 2,320 3,986 4,734 Other service charges 221 235 454 498 Total noninterest bearing deposit account income 4,598 5,163 9,385 10,484 Interest bearing deposit account income: Monthly service charges 15 16 29 33 Total service fees on deposit accounts $ 4,613 $ 5,179 $ 9,414 $ 10,517 Wire transfer fees income: Wire transfer fees $ 1,149 $ 1,229 $ 2,229 $ 2,330 Foreign exchange fees 101 114 228 199 Total wire transfer fees $ 1,250 $ 1,343 $ 2,457 $ 2,529 OREO Income (Expense) OREO is often sold in a transaction that, under ASU 2014-09, may not be considered a contract with a customer because the sale of the asset may not be an output of the Company’s ordinary activities. However, sales of nonfinancial assets, including in-substance nonfinancial assets, should be accounted for in accordance with ASC Subtopic 610-20, “ Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets” , which requires the Company to apply certain measurement and recognition concepts of ASC 606. Accordingly, the Company recognizes the sale of a real estate property, along with any associated gain or loss, when control of the property transfers to the buyer. For sales of existing real estate properties, this generally will occur at a point in time. When the Company finances the sale of OREO to the buyer, the Company assesses whether the buyer is committed to perform their obligations under the contract and whether collectability of the transaction price is probable. Once these criteria are met, the OREO asset is derecognized and the gain or loss on sale is recorded upon the transfer of control of the property to the buyer. Application of the new revenue recognition standard does not materially change the amount and the timing of the gain/loss on sale of OREO and other nonfinancial assets. Further, there were no open OREO/nonfinancial assets sale contracts at the adoption date that required an evaluation under Topic 606. The Company recognized a gain on sale of OREO of $79 thousand and $86 thousand for the three months ended June 30, 2018 and 2017 , respectively. For the six months ended June 30, 2018 and 2017, the Company recognized a gain on sale of OREO of $151 thousand and $82 thousand , respectively.

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2018
Basis Of Presentation [Abstract]
Consolidation	The consolidated financial statements include the accounts of Hope Bancorp and its wholly owned subsidiaries, principally Bank of Hope. All intercompany transactions and balances have been eliminated in consolidation. The Company has made all adjustments, that in the opinion of management, are necessary to fairly present the Company’s financial position at June 30, 2018 and December 31, 2017 and the results of operations for the three and six months ended June 30, 2018 and 2017 . Certain reclassifications have been made to prior period amounts to conform to the current year presentation. The results of operations for the interim periods are not necessarily indicative of results to be anticipated for the full year.
Use of estimates	The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“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 financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ significantly from those estimates.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)”. Subsequently in July 2018, the FASB issued ASU 2018-10, “Codification Improvements to Topic 842, Leases” and ASU 2018-11, “Leases Topic 842, Targeted Improvements”, to provide additional clarification, implementation, and transition guidance on certain aspects of ASU 2016-02. ASU 2016-02 establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 and ASU 2018-10 are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. Under ASU 2018-11, an additional transition option was provided that would allow entities to not apply the new guidance in the comparative periods they present in their financial statements in the year of adoption. Under this optional transition method, entities will be allowed to continue using and presenting leases under ASC 840 for prior years comparative periods and then prospectively adopt ASC 842 on January 1, 2019, recognizing a cumulative-effect adjustment to the opening balance of retained earnings. The Company estimated that there are approximately 100 operating leases that will be accounted for under ASU 2016-02 at the adoption date. The Company plans to elect the transition option to not reassess the following at adoption date: whether contracts are or contain leases, the lease classification for any expired or existing leases, and the evaluation of initial direct costs associated with existing leases. In July 2018, the Company engaged a new software vendor to assist the Company with the administration and accounting of leases under ASU 2016-02. The Company is currently in the process of evaluating the financial impact of the pending adoption of the new standard on its consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, also referred to as “CECL”. ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. ASU 2016-13 becomes effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2019. The Company has established a CECL committee to oversee the development and implementation of ASU 2016-13. The Company is collaborating with a third party advisory team and has completed a gap assessment, a full implementation road-map and a detailed project plan. The Company has also engaged a software vendor to assist the Company to build a model that is compliant with ASU 2016-13 by the effective date. Based on the Company’s initial assessment of the ASU 2016-13, the Company expects the new guidance will result in additional required allowance for loan losses which could potentially have a material impact on its consolidated financial statements and regulatory capital ratios. In January 2017, the FASB issued ASU 2017-04, “Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment.” ASU 2017-04 will amend and simplify current goodwill impairment testing to eliminate Step 2 from the current provisions. Under the new guidance, an entity should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. An entity still has the option to perform the quantitative assessment for a reporting unit to determine if a quantitative impairment test is necessary. ASU 2017-04 should be adopted for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements. In March 2017, the FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities”. ASU 2017-08 was issued to amend the amortization period for certain callable debt securities held at a premium. ASU 2017-08 shortens the amortization period of premiums on certain purchased callable debt securities to the earliest call date. ASU 2017-08 affect all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). ASU 2017-08 does not impact securities purchased at a discount, which continue to be amortized to maturity. ASU 2017-08 is effective for annual period beginning after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted in an interim period. If an entity chooses to adopt early, any adjustments should be reflected as of the beginning of the fiscal year that includes the interim period. The adoption of ASU 2017-08 is not expected to have a material impact on the Company’s consolidated financial statements. In June 2018, the FASB issued ASU 2018-07, “ Compensation - Stock Compensation (Topic 718): Improvements to Nonemployees Share-Based Payment Accounting”. ASU 2018-07 expands the scope of Topic 718 (which currently only includes share-based payments to employees) to include share-based payments issued to nonemployees for goods or services. As ASU 2018-07 becomes effective, the accounting for share-based payments for nonemployees and employees will be substantially the same. The ASU supersedes Subtopic 505-50, Equity – Equity-Based Payments to Non-Employees. ASU 2018-07 is effective for annual period beginning after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted, but no earlier than a company’s adoption date of Topic 606, Revenue from Contracts with Customers. The adoption of ASU 2018-07 is not expected to have a material impact on the Company’s consolidated financial statements as the Company has not historically issued share-based payments to nonemployees for goods and services.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Activity Under the Plan	The following is a summary of stock option activity under the 2016 Plan for the six months ended June 30, 2018 : Number of Shares Weighted- Average Exercise Price Per Share Weighted- Average Remaining Contractual Life (Years) Aggregate Intrinsic Value (Dollars in thousands) Outstanding - January 1, 2018 1,075,423 $ 15.06 Granted — — Exercised (16,742 ) 11.76 Expired (3,195 ) 16.66 Forfeited (24,000 ) 17.18 Outstanding - June 30, 2018 1,031,486 $ 15.06 6.82 $ 2,861 Options exercisable - June 30, 2018 665,380 $ 13.98 6.14 $ 2,564
Summary of Restricted and Performance Unit Activity Under the Plan	The following is a summary of restricted stock and performance unit activity under the 2016 Plan for the six months ended June 30, 2018 : Number of Shares Weighted- Average Grant Date Fair Value Outstanding - January 1, 2018 379,419 $ 16.42 Granted 266,225 16.23 Vested (63,105 ) 15.51 Forfeited (17,556 ) 16.12 Outstanding - June 30, 2018 564,983 $ 16.50

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Computation of basic and diluted EPS	The following tables show the computation of basic and diluted EPS for the three and six months ended June 30, 2018 and 2017 . Three Months Ended June 30, 2018 2017 Net Income (Numerator) Weighted-Average Shares (Denominator) Per Share (Amount) Net Income (Numerator) Weighted-Average Shares Per Share (Amount) (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 47,530 133,061,304 $ 0.36 $ 40,687 135,257,044 $ 0.30 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 291,537 356,137 Diluted EPS - common stock $ 47,530 133,352,841 $ 0.36 $ 40,687 135,613,181 $ 0.30 Six Months Ended June 30, 2018 2017 Net Income (Numerator) Weighted-Average Shares Per Share (Amount) Net Income (Numerator) Weighted-Average Shares Per Share (Amount) (In thousands, except share and per share data) Basic EPS - common stock $ 98,762 134,283,216 $ 0.74 $ 76,897 135,252,556 $ 0.57 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 293,528 432,508 Diluted EPS - common stock $ 98,762 134,576,744 $ 0.73 $ 76,897 135,685,064 $ 0.57

Equity Investment Securities (T

Equity Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule Of Change In Fair Value For Equity Investment Securities	In accordance with ASU 2016-01, the change in fair value for equity investments with readily determinable fair value for the three and six months ended June 30, 2018 were recorded as other noninterest income as summarized in the table below: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 (Dollars in thousands) Net change in fair value recorded during the period on equity investment securities $ (1 ) $ 3,518 Net change in fair value recorded on equity investment securities sold during the period — — Net change in fair value on equity investment securities at end of period $ (1 ) $ 3,518

Securities Available for Sale (

Securities Available for Sale (Tables)	6 Months Ended
	Jun. 30, 2018
Available-for-sale Securities [Abstract]
Summary of Securities Available for Sale	The following is a summary of securities available for sale as of the dates indicated: At June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 928,000 $ 104 $ (31,017 ) $ 897,087 Mortgage-backed securities: Residential 450,690 46 (16,141 ) 434,595 Commercial 435,745 123 (15,597 ) 420,271 Corporate securities 5,000 — (595 ) 4,405 Municipal securities 80,725 281 (2,258 ) 78,748 Total investment securities available for sale $ 1,900,160 $ 554 $ (65,608 ) $ 1,835,106 At December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 856,193 $ 58 $ (17,542 ) $ 838,709 Mortgage-backed securities: Residential 477,676 521 (6,983 ) 471,214 Commercial 308,046 — (6,681 ) 301,365 Corporate securities 4,997 — (522 ) 4,475 Municipal securities 82,542 870 (875 ) 82,537 Total debt securities 1,729,454 1,449 (32,603 ) 1,698,300 Mutual funds 22,425 17 (485 ) 21,957 Total investment securities available for sale $ 1,751,879 $ 1,466 $ (33,088 ) $ 1,720,257
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of investment securities at June 30, 2018 , by contractual maturity, is presented in the table below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately. Amortized Cost Estimated Fair Value (Dollars in thousands) Available for sale: Due within one year $ — $ — Due after one year through five years 12,168 12,274 Due after five years through ten years 33,467 33,184 Due after ten years 40,090 37,695 U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations 928,000 897,087 Mortgage-backed securities: Residential 450,690 434,595 Commercial 435,745 420,271 Total $ 1,900,160 $ 1,835,106
Schedule of Unrealized Loss on Investments	The following tables show the Company’s investments’ gross unrealized losses and estimated fair values, aggregated by investment category and the length of time that the individual securities have been in a continuous unrealized loss position as of the dates indicated. As of June 30, 2018 Less than 12 months 12 months or longer Total Description of Securities Number Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses Number of Fair Value Gross Unrealized Losses (Dollars in thousands) Collateralized mortgage obligations* 41 $ 399,114 $ (11,993 ) 55 $ 393,190 $ (19,024 ) 96 $ 792,304 $ (31,017 ) Mortgage-backed securities: Residential* 27 212,680 (6,103 ) 22 198,956 (10,038 ) 49 411,636 (16,141 ) Commercial* 21 243,579 (6,885 ) 10 129,984 (8,712 ) 31 373,563 (15,597 ) Corporate securities 1 4,405 (595 ) — — — 1 4,405 (595 ) Municipal securities 63 39,391 (694 ) 3 20,090 (1,564 ) 66 59,481 (2,258 ) Total 153 $ 899,169 $ (26,270 ) 90 $ 742,220 $ (39,338 ) 243 $ 1,641,389 $ (65,608 ) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises As of December 31, 2017 Less than 12 months 12 months or longer Total Description of Securities Number of Securities Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses (Dollars in thousands) Collateralized mortgage obligations 38 $ 425,198 $ (5,954 ) 53 $ 408,526 $ (11,588 ) 91 $ 833,724 $ (17,542 ) Mortgage-backed securities: Residential* 20 195,086 (1,282 ) 23 230,616 (5,701 ) 43 425,702 (6,983 ) Commercial* 16 186,357 (1,614 ) 8 115,008 (5,067 ) 24 301,365 (6,681 ) Corporate securities 1 4,475 (522 ) — — — 1 4,475 (522 ) Municipal securities 18 9,295 (69 ) 3 22,144 (806 ) 21 31,439 (875 ) Mutual funds 1 8,899 (101 ) 3 11,579 (384 ) 4 20,478 (485 ) Total 94 $ 829,310 $ (9,542 ) 90 $ 787,873 $ (23,546 ) 184 $ 1,617,183 $ (33,088 ) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises

Loans Receivable and Allowanc31

Loans Receivable and Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Summary of Loans Receivable by Major Category	The following is a summary of loans receivable by major category: June 30, 2018 December 31, 2017 (Dollars in thousands) Loan portfolio composition Real estate loans: Residential $ 45,383 $ 49,774 Commercial 8,165,420 8,142,036 Construction 301,937 316,412 Total real estate loans 8,512,740 8,508,222 Commercial business 2,131,301 1,780,869 Trade finance 156,181 166,664 Consumer and other 872,562 647,102 Total loans outstanding 11,672,784 11,102,857 Deferred loan fees, net (1,344 ) (282 ) Loans receivable 11,671,440 11,102,575 Allowance for loan losses (89,881 ) (84,541 ) Loans receivable, net of allowance for loan losses $ 11,581,559 $ 11,018,034
Loans and Leases Acquired, Accretable Yield Movement Schedule	The following table presents changes in the accretable discount on the PCI loans for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (Dollars in thousands) Balance at beginning of period $ 54,846 $ 51,651 $ 55,002 $ 43,611 Accretion (5,959 ) (5,212 ) (11,731 ) (10,560 ) Reclassification from nonaccretable difference 4,686 7,218 10,302 20,606 Balance at end of period $ 53,573 $ 53,657 $ 53,573 $ 53,657
Allowance for Loan Losses by Portfolio Segment	The following tables detail the activity in the allowance for loan losses by portfolio segment for the three and six months ended June 30, 2018 and 2017 : Legacy Loans Acquired Loans Total Real Estate Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Three Months Ended June 30, 2018 Balance, beginning of period $ 45,977 $ 20,387 $ 1,767 $ 3,934 $ 13,048 $ 1,308 $ 38 $ 2 $ 86,461 Provision (credit) for loan losses 1,776 487 (796 ) 1,086 (141 ) (96 ) (35 ) 19 2,300 Loans charged off (144 ) (446 ) — (229 ) (92 ) (352 ) — — (1,263 ) Recoveries of charge offs 626 1,603 12 8 1 131 — 2 2,383 Balance, end of period $ 48,235 $ 22,031 $ 983 $ 4,799 $ 12,816 $ 991 $ 3 $ 23 $ 89,881 Six Months Ended June 30, 2018 Balance, beginning of period $ 45,360 $ 17,228 $ 1,674 $ 3,385 $ 13,322 $ 3,527 $ 42 $ 3 $ 84,541 Provision (credit) for loan losses 2,255 3,776 (715 ) 1,963 (314 ) (2,142 ) (39 ) 16 4,800 Loans charged off (207 ) (788 ) — (576 ) (194 ) (566 ) — — (2,331 ) Recoveries of charge offs 827 1,815 24 27 2 172 — 4 2,871 Balance, end of period $ 48,235 $ 22,031 $ 983 $ 4,799 $ 12,816 $ 991 $ 3 $ 23 $ 89,881 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Three Months Ended June 30, 2017 Balance, beginning of period $ 43,929 $ 17,479 $ 624 $ 2,022 $ 13,455 $ 944 $ 187 $ 19 $ 78,659 Provision (credit) for loan losses (2,596 ) 3,741 900 500 (69 ) 374 (81 ) (9 ) 2,760 Loans charged off (892 ) (425 ) (528 ) (241 ) 19 (55 ) — — (2,122 ) Recoveries of charge offs 37 700 4 1 6 28 — 1 777 Balance, end of period $ 40,478 $ 21,495 $ 1,000 $ 2,282 $ 13,411 $ 1,291 $ 106 $ 11 $ 80,074 Six Months Ended June 30, 2017 Balance, beginning of period $ 38,956 $ 23,430 $ 1,897 $ 2,116 $ 12,791 $ 117 $ — $ 36 $ 79,343 Provision (credit) for loan losses 3,510 857 1,203 684 906 1,122 106 (28 ) 8,360 Loans charged off (2,046 ) (3,615 ) (2,104 ) (520 ) (317 ) (125 ) — — (8,727 ) Recoveries of charge offs 58 823 4 2 31 177 — 3 1,098 Balance, end of period $ 40,478 $ 21,495 $ 1,000 $ 2,282 $ 13,411 $ 1,291 $ 106 $ 11 $ 80,074 The following tables break out the allowance for loan losses and the recorded investment of loans outstanding (not including accrued interest receivable and net deferred loan costs or fees by individually impaired, general valuation, and PCI impairment, by portfolio segment, at June 30, 2018 and December 31, 2017 : June 30, 2018 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 6,353 $ 3,169 $ 252 $ 15 $ 305 $ 511 $ — $ 1 $ 10,606 Collectively evaluated for impairment 41,882 18,862 731 4,784 1,145 480 3 22 67,909 PCI loans — — — — 11,366 — — — 11,366 Total $ 48,235 $ 22,031 $ 983 $ 4,799 $ 12,816 $ 991 $ 3 $ 23 $ 89,881 Loans outstanding: Individually evaluated for impairment $ 45,977 $ 30,151 $ 3,694 $ 851 $ 15,218 $ 16,800 $ 2,961 $ 2,111 $ 117,763 Collectively evaluated for impairment 6,446,113 1,939,901 149,012 717,591 1,857,454 118,508 514 143,156 11,372,249 PCI loans — — — — 147,978 25,941 — 8,853 182,772 Total $ 6,492,090 $ 1,970,052 $ 152,706 $ 718,442 $ 2,020,650 $ 161,249 $ 3,475 $ 154,120 $ 11,672,784 December 31, 2017 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 1,378 $ 2,807 $ 3 $ 35 $ 246 $ 854 $ — $ — $ 5,323 Collectively evaluated for impairment 43,982 14,421 1,671 3,350 1,036 2,673 42 3 67,178 PCI loans — — — — 12,040 — — — 12,040 Total $ 45,360 $ 17,228 $ 1,674 $ 3,385 $ 13,322 $ 3,527 $ 42 $ 3 $ 84,541 Loans outstanding: Individually evaluated for impairment $ 41,041 $ 31,322 $ 3,951 $ 908 $ 14,239 $ 18,733 $ 2,984 $ 1,171 $ 114,349 Collectively evaluated for impairment 6,172,448 1,459,273 152,204 477,375 2,120,001 244,980 7,525 157,794 10,791,600 PCI loans — — — — 160,493 26,561 — 9,854 196,908 Total $ 6,213,489 $ 1,490,595 $ 156,155 $ 478,283 $ 2,294,733 $ 290,274 $ 10,509 $ 168,819 $ 11,102,857
Impaired Financing Receivables	The recorded investment of individually impaired loans and the total impaired loans net of specific allowance is presented in the following table: June 30, 2018 December 31, 2017 (Dollars in thousands) With allocated specific allowance Without charge off $ 48,192 $ 28,614 With charge off 1,188 3,044 With no allocated specific allowance Without charge off 61,806 77,533 With charge off 6,577 5,158 Specific allowance on impaired loans (10,606 ) (5,323 ) Impaired loans, net of specific allowance $ 107,157 $ 109,026 The following tables detail the recorded investment of impaired loans (Legacy Loans and Acquired Loans that became impaired subsequent to being originated and acquired, respectfully) as of June 30, 2018 and December 31, 2017 , and the average recorded investment and interest income recognized for the three and six months ended June 30, 2018 and 2017 . Impaired loans with no related allowance are believed by management to be adequately collateralized. As of June 30, 2018 As of December 31, 2017 Total Impaired Loans Recorded Investment* Unpaid Contractual Principal Balance Related Allowance Recorded Investment* Unpaid Contractual Principal Balance Related Allowance (Dollars in thousands) With related allowance: Real estate—residential $ 251 $ 251 $ 2 $ — $ — $ — Real estate—commercial Retail 7,790 8,027 5,662 532 531 131 Hotel & motel 2,758 3,055 860 2,931 5,090 284 Gas station & car wash — — — — — — Mixed use 3,012 3,071 15 312 958 4 Industrial & warehouse 2,855 3,688 103 772 1,482 96 Other 3,918 4,304 16 4,397 4,401 1,109 Real estate—construction — — — — — — Commercial business 24,098 25,806 3,680 18,330 22,757 3,661 Trade finance 3,694 3,694 252 3,861 3,861 3 Consumer and other 1,004 39 16 523 524 35 Subtotal $ 49,380 $ 51,935 $ 10,606 $ 31,658 $ 39,604 $ 5,323 With no related allowance: Real estate—residential $ — $ — $ — $ — $ — $ — Real estate—commercial Retail 7,867 10,855 — 11,792 13,923 — Hotel & motel 4,388 10,113 — 2,841 5,288 — Gas station & car wash 336 1,718 — 591 1,764 — Mixed use 3,847 6,001 — 1,101 3,490 — Industrial & warehouse 11,165 12,127 — 8,429 8,525 — Other 13,008 16,760 — 20,282 24,412 — Real estate—construction — — — 1,300 1,441 — Commercial business 22,853 27,248 — 31,725 33,207 — Trade finance 2,961 2,961 — 3,074 3,091 — Consumer and other 1,958 149 — 1,556 1,676 — Subtotal $ 68,383 $ 87,932 $ — $ 82,691 $ 96,817 $ — Total $ 117,763 $ 139,867 $ 10,606 $ 114,349 $ 136,421 $ 5,323 __________________________________ * Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. For the Three Months Ended June 30, For the Six Months Ended June 30, 2018 2017 2018 2017 Total Impaired Loans Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment (Dollars in thousands) With related allowance: Real estate—residential $ 125 $ — $ — $ — $ 84 $ — $ — $ — Real estate—commercial Retail 7,088 7 1,022 4 4,902 15 1,380 7 Hotel & motel 2,792 — 4,119 16 2,838 — 4,875 32 Gas station & car wash — — — — — — 72 — Mixed use 2,985 39 268 2 2,094 75 247 3 Industrial & warehouse 2,616 36 1,692 — 2,002 67 1,305 — Other 6,655 24 13,584 60 5,902 47 16,583 117 Real estate—construction — — — — — — — — Commercial business 27,487 168 23,154 233 24,435 331 24,284 456 Trade finance 3,146 63 2,018 106 3,384 121 2,049 157 Consumer and other 748 6 77 1 673 6 82 2 Subtotal $ 53,642 $ 343 $ 45,934 $ 422 $ 46,314 $ 662 $ 50,877 $ 774 With no related allowance: Real estate—residential $ — $ — $ 732 $ — $ — $ — $ 1,675 $ — Real estate—commercial Retail 10,917 36 13,214 82 11,209 71 13,060 161 Hotel & motel 3,713 — 9,545 — 3,423 — 8,404 — Gas station & car wash 542 — 3,633 — 558 — 4,103 — Mixed use 2,475 50 3,879 — 2,017 100 5,020 — Industrial & warehouse 11,886 56 8,612 58 10,733 112 8,965 116 Other 13,587 112 14,173 81 15,819 233 16,176 162 Real estate—construction 650 — 2,078 — 867 — 1,819 — Commercial business 20,530 37 9,953 41 19,752 63 9,527 83 Trade finance 3,165 47 2,298 2 3,134 90 2,838 3 Consumer and other 1,807 — 1,070 6 1,718 — 1,071 13 Subtotal $ 69,272 $ 338 $ 69,187 $ 270 $ 69,230 $ 669 $ 72,658 $ 538 Total $ 122,914 $ 681 $ 115,121 $ 692 $ 115,544 $ 1,331 $ 123,535 $ 1,312 __________________________________ * Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. As of June 30, 2018 As of December 31, 2017 Impaired Acquired Loans Recorded Investment* Unpaid Contractual Principal Balance Related Allowance Recorded Investment* Unpaid Contractual Principal Balance Related Allowance (Dollars in thousands) With related allowance: Real estate—residential $ 251 $ 251 $ 2 $ — $ — $ — Real estate—commercial Retail 1,093 1,106 182 262 261 126 Hotel & motel 73 345 8 85 86 2 Gas station & car wash — — — — — — Mixed use 2,839 2,839 14 129 129 1 Industrial & warehouse 268 1,090 96 221 896 96 Other 1,313 1,313 3 319 323 21 Real estate—construction — — — — — — Commercial business 4,653 5,584 511 1,987 2,903 854 Trade finance — — — — — — Consumer and other 153 — 1 — — — Subtotal $ 10,643 $ 12,528 $ 817 $ 3,003 $ 4,598 $ 1,100 With no related allowance: Real estate—residential $ — $ — $ — $ — $ — $ — Real estate—commercial Retail 2,918 3,657 — 3,412 4,099 — Hotel & motel 1,573 2,991 — 482 1,887 — Gas station & car wash 188 708 — 1 28 — Mixed use 71 1,967 — 152 2,240 — Industrial & warehouse 119 894 — 45 45 — Other 4,512 5,281 — 9,131 9,951 — Real estate—construction — — — — — — Commercial business 12,147 12,708 — 16,746 16,926 — Trade finance 2,961 2,961 — 2,984 3,001 — Consumer and other 1,958 149 — 1,171 1,291 — Subtotal $ 26,447 $ 31,316 $ — $ 34,124 $ 39,468 $ — Total $ 37,090 $ 43,844 $ 817 $ 37,127 $ 44,066 $ 1,100 __________________________________ * Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. For the Three Months Ended June 30, For the Six Months Ended June 30, 2018 2017 2018 2017 Impaired Acquired Loans Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment Average Recorded Investment* Interest Income Recognized during Impairment (Dollars in thousands) With related allowance: Real estate—residential $ 125 $ — $ — $ — $ 84 $ — $ — $ — Real estate—commercial Retail 800 — 753 4 621 — 1,110 7 Hotel & motel 79 — 176 — 81 — 117 — Gas station & car wash — — — — — — — — Mixed use 2,899 39 249 2 1,976 75 212 3 Industrial & warehouse 266 — 251 — 251 1 168 — Other 3,314 19 330 4 2,316 37 333 8 Real estate—construction — — — — — — — — Commercial business 8,243 41 744 — 6,158 80 594 — Trade finance — — — — — — — — Consumer and other 76 2 — — 51 2 — — Subtotal $ 15,802 $ 101 $ 2,503 $ 10 $ 11,538 $ 195 $ 2,534 $ 18 With no related allowance: Real estate—residential $ — $ — $ — $ — $ — $ — $ 226 $ — Real estate—commercial Retail 3,108 31 2,903 15 3,209 61 2,985 30 Hotel & motel 1,029 — 4,823 — 847 — 4,805 — Gas station & car wash 193 — 539 — 129 — 882 — Mixed use 36 — 2,664 — 74 — 3,548 — Industrial & warehouse 491 — 65 1 342 — 65 2 Other 4,475 60 2,931 8 6,027 117 3,961 16 Real estate—construction — — — — — — — — Commercial business 8,380 24 408 7 6,660 38 319 14 Trade finance 3,165 47 — — 3,104 90 — — Consumer and other 1,618 — 441 2 1,463 — 437 4 Subtotal $ 22,495 $ 162 $ 14,774 $ 33 $ 21,855 $ 306 $ 17,228 $ 66 Total $ 38,297 $ 263 $ 17,277 $ 43 $ 33,393 $ 501 $ 19,762 $ 84 __________________________________ * Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts.
Aging of Past Due Loans	The following table represent the recorded investment in nonaccrual and loans past due over 90 days or more and still on accrual status by class of loans as of June 30, 2018 and December 31, 2017 . Nonaccrual Loans (1) Accruing Loans Past Due 90 or More Days June 30, 2018 December 31, 2017 June 30, 2018 December 31, 2017 (Dollars in thousands) Legacy Loans: Real estate—residential $ — $ — $ — $ — Real estate—commercial Retail 10,883 3,179 — — Hotel & motel 5,501 3,931 — — Gas station & car wash 149 590 2,564 — Mixed use 762 1,132 — — Industrial & warehouse 6,195 3,403 — — Other 6,581 5,689 — — Real estate—construction — 1,300 — — Commercial business 18,916 8,540 39 — Trade finance — — — — Consumer and other 481 471 427 407 Subtotal $ 49,468 $ 28,235 $ 3,030 $ 407 Acquired Loans: (2) Real estate—residential $ 251 $ — $ — $ — Real estate—commercial Retail 1,319 638 — — Hotel & motel 1,645 568 — — Gas station & car wash 188 1 — — Mixed use 71 152 — — Industrial & warehouse 363 221 — — Other 630 1,389 — — Real estate—construction — — — — Commercial business 12,333 14,560 — — Trade finance — — — — Consumer and other 1,958 1,011 — — Subtotal $ 18,758 $ 18,540 $ — $ — Total $ 68,226 $ 46,775 $ 3,030 $ 407 __________________________________ (1) Total nonaccrual loans exclude guaranteed portion of delinquent SBA loans that are in liquidation totaling $26.0 million and $22.1 million , at June 30, 2018 and December 31, 2017 , respectively. (2) Acquired Loans exclude PCI loans. The following tables present the recorded investment in past due loans, including nonaccrual loans, by the number of days past due as of June 30, 2018 and December 31, 2017 by class of loans: As of June 30, 2018 As of December 31, 2017 30-59 Past Due 60-89 Past Due 90 or More Past Due Total Past Due 30-59 60-89 90 or More Past Due Total (Dollars in thousands) Legacy Loans: Real estate—residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate—commercial Retail 810 1,262 827 2,899 3,239 — 285 3,524 Hotel & motel 2,493 3,534 2,464 8,491 1,884 1,172 2,635 5,691 Gas station & car wash — — 2,598 2,598 956 — 435 1,391 Mixed use — 189 590 779 129 — 952 1,081 Industrial & warehouse 118 1,115 2,472 3,705 1,121 99 2,473 3,693 Other 83 3,166 2,269 5,518 1,409 — 5,425 6,834 Real estate—construction — — — — — — 1,300 1,300 Commercial business 6,312 1,453 7,601 15,366 698 516 2,508 3,722 Trade finance 649 — — 649 — — — — Consumer and other 2,802 113 427 3,342 7,512 97 494 8,103 Subtotal $ 13,267 $ 10,832 $ 19,248 $ 43,347 $ 16,948 $ 1,884 $ 16,507 $ 35,339 Acquired Loans: (1) Real estate—residential $ — $ — $ 251 $ 251 $ — $ — $ — $ — Real estate—commercial Retail 33 — 868 901 81 216 386 683 Hotel & motel 4,098 — 73 4,171 — 1,219 — 1,219 Gas station & car wash 123 — 160 283 1,161 41 1 1,203 Mixed use — — 71 71 151 — 152 303 Industrial & warehouse — — 363 363 804 264 221 1,289 Other 906 — 148 1,054 275 — — 275 Real estate—construction — — — — — — — — Commercial business 214 136 1,061 1,411 1,088 256 885 2,229 Trade finance — — — — — — — — Consumer and other 1,826 — 432 2,258 957 270 181 1,408 Subtotal $ 7,200 $ 136 $ 3,427 $ 10,763 $ 4,517 $ 2,266 $ 1,826 $ 8,609 Total Past Due $ 20,467 $ 10,968 $ 22,675 $ 54,110 $ 21,465 $ 4,150 $ 18,333 $ 43,948 __________________________________ (1) Acquired Loans exclude PCI loans.
Risk Category of Loans by Class of Loans	The following tables present the recorded investment of risk ratings for Legacy and Acquired Loans as of June 30, 2018 and December 31, 2017 by class of loans: As of June 30, 2018 Pass/ Not Rated Special Mention Substandard Doubtful Total (Dollars in thousands) Legacy Loans: Real estate—residential $ 32,669 $ 519 $ 404 $ — $ 33,592 Real estate—commercial Retail 1,691,312 9,333 25,527 5,461 1,731,633 Hotel & motel 1,245,407 13,004 14,745 — 1,273,156 Gas station & car wash 774,954 5,686 2,916 — 783,556 Mixed use 456,488 6,971 6,279 — 469,738 Industrial & warehouse 625,276 13,527 29,909 — 668,712 Other 1,249,912 30,779 34,513 — 1,315,204 Real estate—construction 208,671 6,076 1,752 — 216,499 Commercial business 1,885,670 11,048 72,943 391 1,970,052 Trade finance 146,267 4,491 1,948 — 152,706 Consumer and other 717,590 1 851 — 718,442 Subtotal $ 9,034,216 $ 101,435 $ 191,787 $ 5,852 $ 9,333,290 Acquired Loans: Real estate—residential $ 11,283 $ — $ 508 $ — $ 11,791 Real estate—commercial Retail 549,238 2,567 18,392 — 570,197 Hotel & motel 247,404 3,254 22,879 — 273,537 Gas station & car wash 171,446 279 8,557 — 180,282 Mixed use 87,724 2,135 11,030 — 100,889 Industrial & warehouse 221,227 10,147 17,773 248 249,395 Other 508,871 13,623 26,627 — 549,121 Real estate—construction 81,051 4,387 — — 85,438 Commercial business 115,026 1,628 44,577 18 161,249 Trade finance 514 — 2,961 — 3,475 Consumer and other 147,619 39 6,309 153 154,120 Subtotal $ 2,141,403 $ 38,059 $ 159,613 $ 419 $ 2,339,494 Total $ 11,175,619 $ 139,494 $ 351,400 $ 6,271 $ 11,672,784 As of December 31, 2017 Pass/ Special Mention Substandard Doubtful Total (Dollars in thousands) Legacy Loans: Real estate—residential $ 33,557 $ 1,147 $ 1,439 $ — $ 36,143 Real estate—commercial Retail 1,640,809 32,723 17,856 — 1,691,388 Hotel & motel 1,224,597 19,358 8,877 — 1,252,832 Gas station & car wash 737,485 9,013 590 — 747,088 Mixed use 421,755 4,581 1,477 — 427,813 Industrial & warehouse 577,344 16,716 24,317 — 618,377 Other 1,133,188 30,030 53,995 — 1,217,213 Real estate—construction 219,583 — 3,052 — 222,635 Commercial business 1,389,043 35,640 65,912 — 1,490,595 Trade finance 152,583 2,200 1,372 — 156,155 Consumer and other 477,370 5 908 — 478,283 Subtotal $ 8,007,314 $ 151,413 $ 179,795 $ — $ 8,338,522 Acquired Loans: Real estate—residential $ 13,369 $ 262 $ — $ — $ 13,631 Real estate—commercial Retail 630,555 6,921 20,797 — 658,273 Hotel & motel 275,191 4,247 24,987 — 304,425 Gas station & car wash 194,063 2,872 8,992 — 205,927 Mixed use 94,864 5,725 14,738 — 115,327 Industrial & warehouse 250,049 14,973 16,358 265 281,645 Other 568,545 19,848 33,335 — 621,728 Real estate—construction 93,777 — — — 93,777 Commercial business 236,705 8,593 44,964 12 290,274 Trade finance 7,455 — 3,054 — 10,509 Consumer and other 162,495 37 6,202 85 168,819 Subtotal $ 2,527,068 $ 63,478 $ 173,427 $ 362 $ 2,764,335 Total $ 10,534,382 $ 214,891 $ 353,222 $ 362 $ 11,102,857
Loans Sold From Loans Held For Investment	The breakdown of loans by type that were reclassified from held to investment to held for sale for the three and six months ended June 30, 2018 and 2017 is presented in the following table: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Transfer of loans receivable to held for sale (Dollars in thousands) Real estate - commercial $ — $ 2,671 $ — $ 11,370 Commercial business — 2,243 — 2,995 Consumer — 225 6,155 225 Total $ — $ 5,139 $ 6,155 $ 14,590
Allowance for Loan Losses and Impaired Loans, Qualitative and Quantitative Analysis	The following table presents breakdown of loans by impairment method at June 30, 2018 and December 31, 2017 : As of June 30, 2018 Real Estate - Residential Real Estate - Commercial Real Estate - Construction Commercial Business Trade Finance Consumer and Other Total (Dollars in thousands) Impaired loans (recorded investment) $ 251 $ 60,944 $ — $ 46,951 $ 6,655 $ 2,962 $ 117,763 Specific allowance $ 2 $ 6,656 $ — $ 3,680 $ 252 $ 16 $ 10,606 Specific allowance to impaired loans 0.80 % 10.92 % N/A 7.84 % 3.79 % 0.54 % 9.01 % Other loans $ 45,132 $ 8,104,476 $ 301,937 $ 2,084,350 $ 149,526 $ 869,600 $ 11,555,021 General allowance $ 47 $ 53,925 $ 421 $ 19,342 $ 734 $ 4,806 $ 79,275 General allowance to other loans 0.10 % 0.67 % 0.14 % 0.93 % 0.49 % 0.55 % 0.69 % Total loans $ 45,383 $ 8,165,420 $ 301,937 $ 2,131,301 $ 156,181 $ 872,562 $ 11,672,784 Total allowance for loan losses $ 49 $ 60,581 $ 421 $ 23,022 $ 986 $ 4,822 $ 89,881 Total allowance to total loans 0.11 % 0.74 % 0.14 % 1.08 % 0.63 % 0.55 % 0.77 % As of December 31, 2017 Real Estate - Residential Real Estate - Commercial Real Estate - Construction Commercial Business Trade Finance Consumer and Other Total (Dollars in thousands) Impaired loans (recorded investment) $ — $ 53,980 $ 1,300 $ 50,055 $ 6,935 $ 2,079 $ 114,349 Specific allowance $ — $ 1,624 $ — $ 3,661 $ 3 $ 35 $ 5,323 Specific allowance to impaired loans N/A 3.01 % N/A 7.31 % 0.04 % 1.68 % 4.66 % Other loans $ 49,774 $ 8,088,056 $ 315,112 $ 1,730,814 $ 159,729 $ 645,023 $ 10,988,508 General allowance $ 88 $ 56,040 $ 930 $ 17,094 $ 1,713 $ 3,353 $ 79,218 General allowance to other loans 0.18 % 0.69 % 0.30 % 0.99 % 1.07 % 0.52 % 0.72 % Total loans $ 49,774 $ 8,142,036 $ 316,412 $ 1,780,869 $ 166,664 $ 647,102 $ 11,102,857 Total allowance for loan losses $ 88 $ 57,664 $ 930 $ 20,755 $ 1,716 $ 3,388 $ 84,541 Total allowance to total loans 0.18 % 0.71 % 0.29 % 1.17 % 1.03 % 0.52 % 0.76 %
Troubled Debt Restructurings	The following tables present the recorded investment of loans classified as TDRs during the three and six months ended June 30, 2018 and 2017 by class of loans: Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Number of Loans Pre- Modification Post- Modification Number of Loans Pre- Modification Post- Modification (Dollars in thousands) Legacy Loans: Real estate—residential — $ — $ — — $ — $ — Real estate—commercial Retail 1 54 54 1 660 641 Hotel & motel — — — — — — Gas station & car wash — — — — — — Mixed use — — — — — — Industrial & warehouse — — — — — — Other — — — — — — Real estate—construction — — — — — — Commercial business 10 2,830 2,830 3 5,193 5,163 Trade finance — — — — — — Consumer and other 1 70 70 — — — Subtotal 12 $ 2,954 $ 2,954 4 $ 5,853 $ 5,804 Acquired Loans: Real estate—residential — $ — $ — — $ — $ — Real estate—commercial Retail — — — 1 128 125 Hotel & motel — — — — — — Gas station & car wash — — — — — — Mixed use — — — — — — Industrial & warehouse — — — — — — Other — — — — — — Real estate—construction — — — — — — Commercial business 2 1,348 1,348 — — — Trade finance — — — — — — Consumer and other — — — — — — Subtotal 2 $ 1,348 $ 1,348 1 $ 128 $ 125 Total 14 $ 4,302 $ 4,302 5 $ 5,981 $ 5,929 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Number of Pre- Post- Number of Loans Pre- Modification Post- Modification (Dollars in thousands) Legacy Loans: Real estate—residential — $ — $ — — $ — $ — Real estate—commercial Retail 2 66 66 1 660 641 Hotel & motel — — — — — — Gas station & car wash — — — — — — Mixed use — — — — — — Industrial & warehouse 1 2,093 2,093 — — — Other 1 1,231 1,231 — — — Real estate - construction — — — — — — Commercial business 13 6,486 6,486 5 6,873 6,379 Trade finance — — — — — — Consumer and other 1 70 70 — — — Subtotal 18 $ 9,946 $ 9,946 6 $ 7,533 $ 7,020 Acquired Loans: Real estate—residential — $ — $ — — $ — $ — Real estate—commercial Retail 1 207 207 2 221 220 Hotel & motel — — — — — — Gas station & car wash — — — — — — Mixed use 1 2,714 2,714 — — — Industrial & warehouse — — — — — — Other 1 1,047 1,047 — — — Real estate—construction — — — — — — Commercial business 2 1,348 1,348 2 649 503 Trade finance — — — — — — Consumer and other — — — — — — Subtotal 5 $ 5,316 $ 5,316 4 $ 870 $ 723 Total 23 $ 15,262 $ 15,262 10 $ 8,403 $ 7,743 A summary of the recorded investment of TDRs on accrual and nonaccrual status by type of concession as of June 30, 2018 and December 31, 2017 is presented below: As of June 30, 2018 TDRs on Accrual Status TDRs on Nonaccrual Status Total TDRs Real Estate Commercial Business Other Total Real Estate Commercial Business Other Total (Dollars in thousands) Payment concession $ 11,003 $ 1,227 $ — $ 12,230 $ 3,023 $ 538 $ — $ 3,561 $ 15,791 Maturity / amortization concession 10,367 13,638 7,078 31,083 551 15,070 199 15,820 46,903 Rate concession 4,970 836 100 5,906 1,020 — — 1,020 6,926 Total $ 26,340 $ 15,701 $ 7,178 $ 49,219 $ 4,594 $ 15,608 $ 199 $ 20,401 $ 69,620 As of December 31, 2017 TDRs on Accrual Status TDRs on Nonaccrual Status Total TDRs Real Estate Commercial Business Other Total Real Estate Commercial Business Other Total (Dollars in thousands) Payment concession $ 22,550 $ 376 $ — $ 22,926 $ 3,071 $ 170 $ — $ 3,241 $ 26,167 Maturity / amortization concession 4,768 25,584 7,442 37,794 1,536 5,264 98 6,898 44,692 Rate concession 5,444 996 90 6,530 1,083 18 — 1,101 7,631 Total $ 32,762 $ 26,956 $ 7,532 $ 67,250 $ 5,690 $ 5,452 $ 98 $ 11,240 $ 78,490
Summary of Troubled Debt Restructurings with Subsequent Payment Default	The following table presents loans modified as TDRs within the previous twelve months ended June 30, 2018 and June 30, 2017 that subsequently had payment defaults during the three and six months ended June 30, 2018 and June 30, 2017 : Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Legacy Loans: Real estate—commercial Retail — $ — — $ — Hotel & motel — — — — Gas station & car wash — — — — Mixed Use — — — — Industrial & warehouse — — — — Other — — 1 796 Real estate—construction — — — — Commercial business 4 1,188 2 846 Trade finance — — — — Consumer and other — — — — Subtotal 4 $ 1,188 3 $ 1,642 Acquired Loans: Real estate—commercial Retail — $ — — $ — Hotel & motel — — — — Gas station & car wash — — — — Mixed Use — — — — Industrial & warehouse — — — — Other — — — — Real estate—construction — — — — Commercial business — — 1 10 Trade finance — — — — Consumer and other — — — — Subtotal — $ — 1 $ 10 Total 4 $ 1,188 4 $ 1,652 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Legacy Loans: Real estate—commercial Retail — $ — — $ — Hotel & motel — — — — Gas station & car wash — — — — Mixed Use — — — — Industrial & warehouse — — — — Other — — 1 796 Real estate—construction — — — — Commercial business 4 1,188 2 846 Trade finance — — — — Consumer and other — — — — Subtotal 4 $ 1,188 3 $ 1,642 Acquired Loans: Real estate—commercial Retail — $ — — $ — Hotel & motel — — — — Gas station & car wash — — — — Mixed Use — — — — Industrial & warehouse — — — — Other 1 3,108 — — Real estate—construction — — — — Commercial business 1 — 1 10 Trade finance — — — — Consumer and other — — — — Subtotal 2 $ 3,108 1 $ 10 Total 6 $ 4,296 4 $ 1,652

Borrowings (Tables)

Borrowings (Tables)	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Contractual Maturities for FHLB-SF Borrowings	At June 30, 2018 , the contractual maturities for FHLB advances were as follows: June 30, 2018 Scheduled maturities in: (Dollars in thousands) 2018 $ 40,000 2019 320,000 2020 185,000 2021 145,000 2022 and thereafter 145,000 Premium on acquired advances - no maturity 1,994 Total Balance $ 836,994

Subordinated Debentures and C33

Subordinated Debentures and Convertible Notes (Tables)	6 Months Ended
	Jun. 30, 2018
Subordinated Borrowings [Abstract]
Summary of Trust Preferred Securities and Debentures	The following table is a summary of trust preferred securities and Debentures at June 30, 2018 : Issuance Trust Issuance Date Trust Preferred Security Amount Carrying Rate Type Current Rate Maturity Date (Dollars in thousands) Nara Capital Trust III 06/05/2003 $ 5,000 $ 5,155 Variable 5.49% 06/15/2033 Nara Statutory Trust IV 12/22/2003 5,000 5,155 Variable 5.20% 01/07/2034 Nara Statutory Trust V 12/17/2003 10,000 10,310 Variable 5.28% 12/17/2033 Nara Statutory Trust VI 03/22/2007 8,000 8,248 Variable 3.99% 06/15/2037 Center Capital Trust I 12/30/2003 18,000 13,924 Variable 5.20% 01/07/2034 Wilshire Statutory Trust II 03/17/2005 20,000 15,419 Variable 4.12% 03/17/2035 Wilshire Statutory Trust III 09/15/2005 15,000 10,857 Variable 3.74% 09/15/2035 Wilshire Statutory Trust IV 07/10/2007 25,000 17,618 Variable 3.72% 09/15/2037 Saehan Capital Trust I 03/30/2007 20,000 14,700 Variable 3.96% 06/30/2037 Total $ 126,000 $ 101,386
Convertible Debt	The value of the convertible note at issuance and carrying value as of June 30, 2018 is presented below: As of June 30, 2018 Amortization/ Capitalization Period Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880 ) 518 (21,362 ) Issuance costs to be capitalized 5 years (4,119 ) 101 (4,018 ) Carrying balance of convertible notes $ 191,501 $ 619 $ 192,120

Derivative Financial Instrume34

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location	At June 30, 2018 and December 31, 2017 , interest rate swaps related to the Company’s loan hedging program that were outstanding is presented in the following table: As of June 30, 2018 As of December 31, 2017 (Dollars in thousands) Interest rate swaps on loans with loan customers: Notional amount $ 298,082 $ 274,156 Weighted average remaining term 6.8 years 7.3 years Received fixed rate (weighted average) 4.41 % 4.34 % Pay variable rate (weighted average) 4.27 % 3.74 % Estimated fair value $ (10,534 ) $ (2,838 ) Back to back interest rate swaps with correspondent banks: Notional amount $ 298,082 $ 274,156 Weighted average remaining term 6.8 years 7.3 years Received variable rate (weighted average) 4.27 % 3.74 % Pay fixed rate (weighted average) 4.41 % 4.34 % Estimated fair value $ 10,534 $ 2,838
Schedule of Derivative Instruments	The following table reflects the notional amount and fair value of mortgage banking derivatives for the dates indicated: As of June 30, 2018 As of December 31, 2017 Notional Amount Fair Value Notional Amount Fair Value (Dollars in thousands) Assets: Interest rate lock commitments $ 2,107 $ 17 $ 4,795 $ 25 Forward sale contracts related to mortgage banking $ 882 $ 1 $ 2,452 $ 8 Liabilities: Interest rate lock commitments $ — $ — $ — $ — Forward sale contracts related to mortgage banking $ 1,225 $ (5 ) $ 2,343 $ 5

Commitments and contingencies (

Commitments and contingencies (Tables)	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments at June 30, 2018 and December 31, 2017 are summarized as follows: June 30, 2018 December 31, 2017 (Dollars in thousands) Commitments to extend credit $ 1,676,694 $ 1,526,981 Standby letters of credit 77,758 74,748 Other letters of credit 125,630 74,147 Commitments to fund investments in affordable housing partnerships 38,056 38,467 Interest rate lock 2,107 4,795 Forward sale commitments 2,107 4,795 Operating lease commitments 69,304 66,698

Goodwill, Intangible Assets, 36

Goodwill, Intangible Assets, and Servicing Assets (Tables)	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table provides information regarding the core deposit intangibles at June 30, 2018 : As of June 30, 2018 Core Deposit Intangibles Related To: Amortization Period Gross Carrying Amount Accumulated Amortization Carrying Amount (Dollars in thousands) Center Financial acquisition 7 years $ 4,100 $ (4,033 ) $ 67 Pacific International Bank acquisition 7 years 604 (556 ) 48 Foster Bankshares acquisition 10 years 2,763 (1,765 ) 998 Wilshire Bancorp acquisition 10 years 18,138 (3,959 ) 14,179 Total $ 25,605 $ (10,313 ) $ 15,292
Schedule of Servicing Assets	The changes in servicing assets for the three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (Dollars in thousands) Balance at beginning of period $ 24,866 $ 25,941 $ 24,710 $ 26,457 Additions through originations of servicing assets 1,600 1,316 3,316 2,612 Amortization (2,086 ) (1,919 ) (3,646 ) (3,731 ) Adjustments 670 — 670 — Balance at end of period $ 25,050 $ 25,338 $ 25,050 $ 25,338
Summary of Fair Value Inputs	The inputs used in evaluating servicing assets for impairment at June 30, 2018 and December 31, 2017 are presented below. June 30, 2018 December 31, 2017 SBA Servicing Assets: Weighted-average discount rate 12.09% 11.13% Constant prepayment rate 9.99% 8.38% Mortgage Servicing Assets: Weighted-average discount rate 10.13% 9.63% Constant prepayment rate 7.65% 9.05%

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below: Fair Value Measurements at the End of June 30, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 897,087 $ — $ 897,087 $ — Mortgage-backed securities: — — Residential 434,595 — 434,595 — Commercial 420,271 — 420,271 — Corporate securities 4,405 — 4,405 — Municipal securities 78,748 — 77,683 1,065 Equity investments with readily determinable fair value 25,475 25,475 — — Mutual funds — — — — Interest rate swaps (10,534 ) — (10,534 ) — Mortgage banking derivatives 18 — 18 — Liabilities: Interest rate swaps (10,534 ) — (10,534 ) — Mortgage banking derivatives 5 — 5 — Fair Value Measurements at the End of the Reporting Period Using December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 838,709 $ — $ 838,709 $ — Mortgage-backed securities: Residential 471,214 — 471,214 — Commercial 301,365 — 301,365 — Corporate securities 4,475 — 4,475 — Municipal securities 82,537 — 81,429 1,108 Mutual funds 21,957 21,957 — — Interest rate swaps (2,838 ) — (2,838 ) — Mortgage banking derivatives 33 — 33 — Liabilities: Interest rate swaps (2,838 ) — (2,838 ) — Mortgage banking derivatives 5 — 5 —
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The table below presents a reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (Dollars in thousands) Beginning Balance $ 1,079 $ 1,128 $ 1,108 $ 1,139 Total losses included in other comprehensive income (14 ) (1 ) (43 ) (12 ) Ending Balance $ 1,065 $ 1,127 $ 1,065 $ 1,127
Assets Measured at Fair Value on a Non-recurring Basis	Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at the End of the Reporting Period Using June 30, 2018 Quoted Prices Significant Significant (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 13,660 $ — $ — $ 13,660 Commercial business 8,011 — — 8,011 Trade finance 3,594 — — 3,594 Consumer 66 — — 66 OREO 3,741 — — 3,741 Fair Value Measurements at the End of the Reporting Period Using December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 6,086 $ — $ — $ 6,086 Commercial business 3,320 — — 3,320 Consumer 84 — — 84 OREO 5,615 — — 5,615 For assets measured at fair value on a non-recurring basis, the total net gains (losses), which include charge offs, recoveries, specific reserves, and recognized gains and losses on sales are summarized below: For the Three Months Ended June 30, For the Six Months Ended June 30, 2018 2017 2018 2017 (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 966 $ (433 ) $ (4,606 ) $ (2,435 ) Commercial business 1,513 (4,027 ) 614 (5,001 ) Trade Finance (240 ) (527 ) (225 ) (1,239 ) Consumer 448 (229 ) (763 ) (495 ) Loans held for sale, net — 353 — 772 OREO 192 (733 ) 264 (1,328 )
Carrying Amounts and Estimated Fair Values of Financial Instruments	Carrying amounts and estimated fair values of financial instruments, not previously presented, at June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 Carrying Estimated Fair Value Measurement Using (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 466,364 $ 466,364 Level 1 Interest bearing deposits in other financial institutions and other investments 77,817 77,748 Level 2/3 Loans held for sale 26,866 28,781 Level 2 Loans receivable—net 11,581,559 11,521,742 Level 3 FHLB stock 26,947 N/A N/A Accrued interest receivable 30,954 30,954 Level 2/3 Servicing assets, net 25,050 25,814 Level 3 Customers’ liabilities on acceptances 868 868 Level 2 Financial Liabilities: Noninterest bearing deposits $ 3,038,265 $ 3,038,265 Level 2 Saving and other interest bearing demand deposits 3,512,388 3,512,388 Level 2 Time deposits 5,183,942 5,200,868 Level 2 FHLB advances 836,994 834,919 Level 2 Convertible notes, net 192,120 214,429 Level 1 Subordinated debentures 101,386 117,435 Level 2 Accrued interest payable 24,594 24,594 Level 2 Acceptances outstanding 868 868 Level 2 December 31, 2017 Carrying Estimated Fair Value Measurement Using (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 492,000 $ 492,000 Level 1 Interest bearing deposits in other financial institutions and other investments 53,366 52,960 Level 2/3 Loans held for sale 29,661 32,048 Level 2 Loans receivable—net 11,018,034 11,112,179 Level 3 FHLB stock 29,776 N/A N/A Accrued interest receivable 29,979 29,979 Level 2/3 Servicing assets, net 24,710 27,511 Level 3 Customers’ liabilities on acceptances 1,691 1,691 Level 2 Financial Liabilities: Noninterest bearing deposits $ 2,998,734 $ 2,998,734 Level 2 Saving and other interest bearing demand deposits 3,573,212 3,573,212 Level 2 Time deposits 4,274,663 4,263,585 Level 2 FHLB advances 1,157,693 1,220,529 Level 2 Federal funds purchased 69,900 69,900 Level 2 Subordinated debentures 100,853 100,853 Level 2 Accrued interest payable 15,961 15,961 Level 2 Acceptances outstanding 1,691 1,691 Level 2

Stockholders_ Equity (Tables)

Stockholders’ Equity (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the quarterly changes to accumulated other comprehensive (loss) income for the three and six months ended June 30, 2018 and June 30, 2017 : Three Months Ended, June 30, 2018 June 30, 2017 (Dollars in thousands) Balance at beginning of period $ (38,640 ) $ (12,849 ) Unrealized loss on securities available for sale and interest only strips (9,249 ) 4,776 Tax effect 2,767 (2,016 ) Total other comprehensive (loss) income $ (6,482 ) $ 2,760 Balance at end of period $ (45,122 ) $ (10,089 ) Six Months Ended, June 30, 2018 June 30, 2017 (Dollars in thousands) Balance at beginning of period $ (21,781 ) $ (14,657 ) Unrealized gains on securities available for sale and interest only strips (33,898 ) 7,908 Tax effect 10,276 (3,340 ) Total other comprehensive (loss) income $ (23,622 ) $ 4,568 Reclassification to retained earnings per ASU 2016-01 281 — Balance at end of period $ (45,122 ) $ (10,089 )

Regulatory Matters (Tables)

Regulatory Matters (Tables)	6 Months Ended
	Jun. 30, 2018
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The Company’s and the Bank’s capital amounts and ratios are presented in the table below for the dates indicated: Actual Required Minimum Capital Adequacy With Capital Conservation Buffer Required Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of June 30, 2018 Common equity Tier 1 capital (to risk weighted assets): Company $ 1,470,620 11.74 % $ 563,726 4.50 % $ 798,612 6.375 % N/A N/A Bank $ 1,727,710 13.79 % $ 563,692 4.50 % $ 798,563 6.375 % $ 814,221 6.50 % Total capital (to risk-weighted assets): Company $ 1,658,771 13.24 % $ 1,002,180 8.00 % $ 1,237,066 9.875 % N/A N/A Bank $ 1,818,376 14.52 % $ 1,002,119 8.00 % $ 1,236,990 9.875 % $ 1,252,648 10.00 % Tier I capital (to risk-weighted assets): Company $ 1,568,105 12.52 % $ 751,635 6.00 % $ 986,521 7.875 % N/A N/A Bank $ 1,727,710 13.79 % $ 751,589 6.00 % $ 798,563 7.875 % $ 1,002,119 8.00 % Tier I capital (to average assets): Company $ 1,568,105 11.06 % $ 567,163 4.00 % N/A N/A N/A N/A Bank $ 1,727,710 12.21 % $ 565,851 4.00 % N/A N/A $ 707,314 5.00 % Actual Required Minimum Capital Adequacy With Capital Conservation Buffer Required Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of December 31, 2017 Common equity Tier 1 capital (to risk weighted assets): Company $ 1,471,193 12.30 % $ 538,435 4.50 % $ 688,000 5.75 % N/A N/A Bank $ 1,548,401 12.95 % $ 538,178 4.50 % $ 687,672 5.75 % $ 777,368 6.50 % Total capital (to risk-weighted assets): Company $ 1,653,521 13.82 % $ 957,217 8.00 % $ 1,106,782 9.25 % N/A N/A Bank $ 1,633,778 13.66 % $ 956,761 8.00 % $ 1,106,255 9.25 % $ 1,195,951 10.00 % Tier I capital (to risk-weighted assets): Company $ 1,568,144 13.11 % $ 717,913 6.00 % $ 867,478 7.25 % N/A N/A Bank $ 1,548,401 12.95 % $ 717,571 6.00 % $ 687,672 7.25 % $ 956,761 8.00 % Tier I capital (to average assets): Company $ 1,568,144 11.54 % $ 543,528 4.00 % N/A N/A N/A N/A Bank $ 1,548,401 11.40 % $ 543,441 4.00 % N/A N/A $ 679,301 5.00 %

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Service charges on deposit accounts and wire transfers are summarized below: Three Months Ended June 30, Six Months Ended June 30 2018 2017 2018 2017 (Dollars in thousands) Noninterest bearing deposit account income: Monthly service charges $ 446 $ 444 $ 885 $ 908 Customer analysis charges 2,036 2,164 4,060 4,344 NSF charges 1,895 2,320 3,986 4,734 Other service charges 221 235 454 498 Total noninterest bearing deposit account income 4,598 5,163 9,385 10,484 Interest bearing deposit account income: Monthly service charges 15 16 29 33 Total service fees on deposit accounts $ 4,613 $ 5,179 $ 9,414 $ 10,517 Wire transfer fees income: Wire transfer fees $ 1,149 $ 1,229 $ 2,229 $ 2,330 Foreign exchange fees 101 114 228 199 Total wire transfer fees $ 1,250 $ 1,343 $ 2,457 $ 2,529

Basis of Presentation (Details)

Basis of Presentation (Details)	6 Months Ended
	Jun. 30, 2018lease
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated number of operating leases that will be accounted for under ASU 2016-02	100

Stock-Based Compensation - Plan

Stock-Based Compensation - Plan Description (Details) - shares	6 Months Ended
	Jun. 30, 2018	Sep. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future grant (in shares)	1,113,746
Restricted stock, performance shares and performance units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock, restriction period	1 year
Time based vesting of grants | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock, restriction period	3 years
2016 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares initially available for grant to participants (in shares)		2,400,000
2016 Plan | Nonemployee director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years
2016 Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, percent	100.00%
2016 Plan | ISOs, SARs, and NQSOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years
2016 Plan | ISOs, SARs, and NQSOs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
2016 Plan | ISOs, SARs, and NQSOs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - Stock options $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)$ / sharesshares
Number of Shares
Outstanding - beginning of period (in shares) | shares	1,075,423
Granted (in shares) | shares	0
Exercised (in shares) | shares	(16,742)
Expired (in shares) | shares	(3,195)
Forfeited (in shares) | shares	(24,000)
Outstanding - end of period (in shares) | shares	1,031,486
Weighted- Average Exercise Price Per Share
Outstanding - beginning of period (in dollars per share) | $ / shares	$ 15.06
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	11.76
Expired (in dollars per share) | $ / shares	16.66
Forfeited (in dollars per share) | $ / shares	17.18
Outstanding - end of period (in dollars per share) | $ / shares	$ 15.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercisable - end of period (in shares) | shares	665,380
Options exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ / shares	$ 13.98
Outstanding, Weighted-Average Remaining Contractual Life (Years)	6 years 9 months 26 days
Options exercisable, Weighted-Average Remaining Contractual Life (Years)	6 years 1 month 21 days
Outstanding, Aggregate Intrinsic Value | $	$ 2,861
Options exercisable, Aggregate Intrinsic Value | $	$ 2,564

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted and Performance Unit Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
ESPP compensation expense			$ 148	$ 0
Allocated share-based compensation expense	$ 915	$ 760	1,900	1,500
Tax benefit from compensation expense	$ 237	$ 292	$ 482	582
Retricted and performance unit activity
Number of Shares
Outstanding - beginning of period (in shares)			379,419
Granted (in shares)			266,225
Vested (in shares)			(63,105)
Forfeited (in shares)			(17,556)
Outstanding - end of period (in shares)	564,983		564,983
Weighted- Average Grant Date Fair Value
Outstanding - beginning of period (in dollars per share)			$ 16.42
Granted (in dollars per share)			16.23
Vested (in dollars per share)			15.51
Forfeited (in dollars per share)			16.12
Outstanding - end of period (in dollars per share)	$ 16.50		$ 16.50
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Total compensation cost not yet recognized	$ 6,100		$ 6,100
Total compensation cost not yet recognized, period for recognition			2 years 8 months 12 days
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Equity instruments other than options, vested in period			$ 1,200	$ 1,300
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Total compensation cost not yet recognized	$ 669		$ 669
Total compensation cost not yet recognized, period for recognition			2 years 8 months 19 days
Employee Stock Purchase Plan (ESPP)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Discount rate to the closing price, offering period			10.00%
Discount rate to the closing price, purchase date			10.00%
Maximum amount of common shares purchased under ESPP of employee's base salary, percent	20.00%		20.00%
Cap amount for shares purchased per employee			$ 25

Earnings Per Share (Details)

Earnings Per Share (Details)	Jun. 07, 2018USD ($)	Jun. 30, 2018USD ($)$ / sharesshares	Jun. 30, 2017USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares	Jun. 30, 2017USD ($)$ / sharesshares	May 11, 2018USD ($)	Apr. 26, 2018USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share
Share repurchase program, authorized amount | $							$ 100,000,000
Common stock repurchased and recorded as treasury stock (in shares) | shares		4,400,000		4,400,000
Repurchase of treasury stock | $		$ 79,000,000		$ 78,961,000
Net Income (Numerator)
Basic EPS - common stock | $		47,530,000	$ 40,687,000	98,762,000	$ 76,897,000
Diluted EPS - common stock | $		$ 47,530,000	$ 40,687,000	$ 98,762,000	$ 76,897,000
Weighted-Average Shares (Denominator)
Basic EPS - common stock (in shares) | shares		133,061,304	135,257,044	134,283,216	135,252,556
Effect of dilutive securities:
Stock options, restricted stock, and ESPP shares (in shares) | shares		291,537	356,137	293,528	432,508
Diluted EPS - common stock (shares) | shares		133,352,841	135,613,181	134,576,744	135,685,064
Per Share (Amount)
Basic EPS - common stock (in dollars per share) | $ / shares		$ 0.36	$ 0.30	$ 0.74	$ 0.57
Diluted EPS - common stock (in dollars per share) | $ / shares		$ 0.36	$ 0.30	$ 0.73	$ 0.57
Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Aggregate principal amount issued | $		$ 217,500,000		$ 217,500,000		$ 200,000,000
Initial conversion rate	0.0450760	0.0450760
Repurchase of treasury stock | $	$ 76,000,000
Stock options and restricted shares
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares of common stock | shares		306,136	530,334	303,338	542,328
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares of common stock | shares		20,673	20,087	20,673	20,087

Equity Investment Securities -

Equity Investment Securities - Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Investment [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01			$ (188,000)
Equity investments without readily determinable fair values	$ 18,200,000	$ 18,200,000
Equity investments without readily determinable fair values, impairment	0	0
Equity investments without readily determinable fair values, observable price changes	0	0
Mutual funds
Investment [Line Items]
Equity investments without readily determinable fair values	21,400,000	21,400,000
Equity stock in other institutions
Investment [Line Items]
Equity investments without readily determinable fair values	4,100,000	4,100,000
Correspondent bank stock
Investment [Line Items]
Equity investments without readily determinable fair values	370,000	370,000
Community reinvestment act investments
Investment [Line Items]
Equity investments without readily determinable fair values	$ 17,800,000	$ 17,800,000
Retained earnings
Investment [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01			$ (469,000)

Equity Investment Securities 47

Equity Investment Securities - Change in Fair Value of Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Net change in fair value recorded during the period on equity investment securities	$ (1)	$ 3,518
Net change in fair value recorded on equity investment securities sold during the period	0	0
Net change in fair value on equity investment securities at end of period	$ (1)	$ 3,518

Securities Available for Sale -

Securities Available for Sale - Summary of Securities Available for Sale (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,900,160,000		$ 1,900,160,000		$ 1,751,879,000
Gross Unrealized Gains	554,000		554,000		1,466,000
Gross Unrealized Losses	(65,608,000)		(65,608,000)		(33,088,000)
Estimated Fair Value	1,835,106,000		1,835,106,000		1,720,257,000
Unrealized losses on securities	45,122,000	$ 10,089,000	45,122,000	$ 10,089,000	21,781,000	$ 38,640,000	$ 12,849,000	$ 14,657,000
Reclassifications out of accumulated other comprehensive (loss) income	0	$ 0	0	$ 0
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01					(188,000)
Available-for-sale Securities
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses on securities	46,200,000		46,200,000		19,000,000
Interest-Only-Strip
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses on securities	47,000		47,000		41,000
Retained earnings
Schedule of Available-for-sale Securities [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01					(469,000)
Retained earnings | Accounting Standards Update 2016-01
Schedule of Available-for-sale Securities [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01					469,000
Collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	928,000,000		928,000,000		856,193,000
Gross Unrealized Gains	104,000		104,000		58,000
Gross Unrealized Losses	(31,017,000)		(31,017,000)		(17,542,000)
Estimated Fair Value	897,087,000		897,087,000		838,709,000
Residential
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	450,690,000		450,690,000		477,676,000
Gross Unrealized Gains	46,000		46,000		521,000
Gross Unrealized Losses	(16,141,000)		(16,141,000)		(6,983,000)
Estimated Fair Value	434,595,000		434,595,000		471,214,000
Commercial
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	435,745,000		435,745,000		308,046,000
Gross Unrealized Gains	123,000		123,000		0
Gross Unrealized Losses	(15,597,000)		(15,597,000)		(6,681,000)
Estimated Fair Value	420,271,000		420,271,000		301,365,000
Corporate securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,000,000		5,000,000		4,997,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(595,000)		(595,000)		(522,000)
Estimated Fair Value	4,405,000		4,405,000		4,475,000
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	80,725,000		80,725,000		82,542,000
Gross Unrealized Gains	281,000		281,000		870,000
Gross Unrealized Losses	(2,258,000)		(2,258,000)		(875,000)
Estimated Fair Value	$ 78,748,000		$ 78,748,000		82,537,000
Total debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost					1,729,454,000
Gross Unrealized Gains					1,449,000
Gross Unrealized Losses					(32,603,000)
Estimated Fair Value					1,698,300,000
Mutual funds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost					22,425,000
Gross Unrealized Gains					17,000
Gross Unrealized Losses					(485,000)
Estimated Fair Value					$ 21,957,000
Non-US Government and Agency Securities | Credit concentration risk | Stockholders' equity
Schedule of Available-for-sale Securities [Line Items]
Maximum exposure to any single issuer			10.00%		10.00%

Securities Available for Sale49

Securities Available for Sale - Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Amortized Cost
Due within one year	$ 0
Due after one year through five years	12,168
Due after five years through ten years	33,467
Due after ten years	40,090
Amortized Cost	1,900,160	$ 1,751,879
Estimated Fair Value
Due within one year	0
Due after one year through five years	12,274
Due after five years through ten years	33,184
Due after ten years	37,695
Estimated Fair Value	1,835,106	1,720,257
Carrying value of securities pledged to secure public deposits, pledged for various borrowings and for other purposes required or permitted by law	356,800	359,200
Collateralized mortgage obligations
Amortized Cost
Amortized Cost	928,000	856,193
Estimated Fair Value
No single maturity date	897,087
Estimated Fair Value	897,087	838,709
Residential
Amortized Cost
Amortized Cost	450,690	477,676
Estimated Fair Value
No single maturity date	434,595
Estimated Fair Value	434,595	471,214
Commercial
Amortized Cost
Amortized Cost	435,745	308,046
Estimated Fair Value
No single maturity date	420,271
Estimated Fair Value	420,271	301,365
Corporate securities
Amortized Cost
Amortized Cost	5,000	4,997
Estimated Fair Value
Estimated Fair Value	4,405	4,475
Municipal securities
Amortized Cost
Amortized Cost	80,725	82,542
Estimated Fair Value
Estimated Fair Value	$ 78,748	82,537
Mutual funds
Amortized Cost
Amortized Cost		22,425
Estimated Fair Value
Estimated Fair Value		$ 21,957

Securities Available for Sale50

Securities Available for Sale - Aggregate Unrealized Losses and Fair Value (Details)	6 Months Ended
	Jun. 30, 2018USD ($)security	Dec. 31, 2017USD ($)security
Number of Securities
Less than 12 months | security	153	94
12 months or longer | security	90	90
Total | security	243	184
Fair Value
Less than 12 months	$ 899,169,000	$ 829,310,000
12 months or longer	742,220,000	787,873,000
Total	1,641,389,000	1,617,183,000
Gross Unrealized Losses
Less than 12 months	(26,270,000)	(9,542,000)
12 months or longer	(39,338,000)	(23,546,000)
Total	(65,608,000)	$ (33,088,000)
Collateralized mortgage obligations
Gross Unrealized Losses
12 months or longer	(19,000,000)
OTTI recognized	$ 0
Collateralized mortgage obligations
Number of Securities
Less than 12 months | security	41	38
12 months or longer | security	55	53
Total | security	96	91
Fair Value
Less than 12 months	$ 399,114,000	$ 425,198,000
12 months or longer	393,190,000	408,526,000
Total	792,304,000	833,724,000
Gross Unrealized Losses
Less than 12 months	(11,993,000)	(5,954,000)
12 months or longer	(19,024,000)	(11,588,000)
Total	$ (31,017,000)	$ (17,542,000)
Residential
Number of Securities
Less than 12 months | security	27	20
12 months or longer | security	22	23
Total | security	49	43
Fair Value
Less than 12 months	$ 212,680,000	$ 195,086,000
12 months or longer	198,956,000	230,616,000
Total	411,636,000	425,702,000
Gross Unrealized Losses
Less than 12 months	(6,103,000)	(1,282,000)
12 months or longer	(10,038,000)	(5,701,000)
Total	$ (16,141,000)	$ (6,983,000)
Commercial
Number of Securities
Less than 12 months | security	21	16
12 months or longer | security	10	8
Total | security	31	24
Fair Value
Less than 12 months	$ 243,579,000	$ 186,357,000
12 months or longer	129,984,000	115,008,000
Total	373,563,000	301,365,000
Gross Unrealized Losses
Less than 12 months	(6,885,000)	(1,614,000)
12 months or longer	(8,712,000)	(5,067,000)
Total	$ (15,597,000)	$ (6,681,000)
Corporate securities
Number of Securities
Less than 12 months | security	1	1
12 months or longer | security	0	0
Total | security	1	1
Fair Value
Less than 12 months	$ 4,405,000	$ 4,475,000
12 months or longer	0	0
Total	4,405,000	4,475,000
Gross Unrealized Losses
Less than 12 months	(595,000)	(522,000)
12 months or longer	0	0
Total	$ (595,000)	$ (522,000)
Municipal securities
Number of Securities
Less than 12 months | security	63	18
12 months or longer | security	3	3
Total | security	66	21
Fair Value
Less than 12 months	$ 39,391,000	$ 9,295,000
12 months or longer	20,090,000	22,144,000
Total	59,481,000	31,439,000
Gross Unrealized Losses
Less than 12 months	(694,000)	(69,000)
12 months or longer	(1,564,000)	(806,000)
Total	(2,258,000)	$ (875,000)
OTTI recognized	0
Mutual funds
Number of Securities
Less than 12 months | security		1
12 months or longer | security		3
Total | security		4
Fair Value
Less than 12 months		$ 8,899,000
12 months or longer		11,579,000
Total		20,478,000
Gross Unrealized Losses
Less than 12 months		(101,000)
12 months or longer		(384,000)
Total		$ (485,000)
Mortgage-backed securities
Gross Unrealized Losses
12 months or longer	(18,800,000)
OTTI recognized	$ 0

Loans Receivable and Allowanc51

Loans Receivable and Allowance for Loan Losses - Schedule of Accounts, Notes, Loans and Financing Receivable (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)segment	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Real estate loans:
Total loans outstanding	$ 11,672,784		$ 11,102,857
Deferred loan fees, net	(1,344)		(282)
Loans receivable	11,671,440		11,102,575
Allowance for loan losses	(89,881)	$ (86,461)	(84,541)	$ (80,074)	$ (78,659)	$ (79,343)
Loans receivable, net of allowance for loan losses	$ 11,581,559		11,018,034
Number of portfolio segments | segment	4
Real estate
Real estate loans:
Total loans outstanding	$ 8,512,740		8,508,222
Real estate | Residential
Real estate loans:
Total loans outstanding	45,383		49,774
Allowance for loan losses	(49)		(88)
Real estate | Commercial
Real estate loans:
Total loans outstanding	8,165,420		8,142,036
Allowance for loan losses	(60,581)		(57,664)
Real estate | Construction
Real estate loans:
Total loans outstanding	301,937		316,412
Allowance for loan losses	(421)		(930)
Commercial business
Real estate loans:
Total loans outstanding	2,131,301		1,780,869
Allowance for loan losses	(23,022)		(20,755)
Trade finance
Real estate loans:
Total loans outstanding	156,181		166,664
Allowance for loan losses	(986)		(1,716)
Consumer and other
Real estate loans:
Total loans outstanding	872,562		647,102
Allowance for loan losses	$ (4,822)		$ (3,388)

Loans Receivable and Allowanc52

Loans Receivable and Allowance for Loan Losses - Accretable Yield Movement Schedule on Acquired Credit Impaired Loans in Center Merger (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 54,846	$ 51,651	$ 55,002	$ 43,611
Accretion	(5,959)	(5,212)	(11,731)	(10,560)
Reclassification from nonaccretable difference	4,686	7,218	10,302	20,606
Balance at end of period	$ 53,573	$ 53,657	$ 53,573	$ 53,657

Loans Receivable and Allowanc53

Loans Receivable and Allowance for Loan Losses - Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	$ 86,461	$ 78,659	$ 84,541	$ 79,343
Provision (credit) for loan losses	2,300	2,760	4,800	8,360
Loans charged off	(1,263)	(2,122)	(2,331)	(8,727)
Recoveries of charge offs	2,383	777	2,871	1,098
Balance, end of period	89,881	80,074	89,881	80,074
Allowance for loan losses - Individually evaluated for impairment					$ 10,606	$ 5,323
Allowance for loan losses - Collectively evaluated for impairment					67,909	67,178
Allowance for loan losses - Total	86,461	78,659	84,541	79,343	89,881	84,541
Loans outstanding - Individually evaluated for impairment					117,763	114,349
Loans outstanding - Collectively evaluated for impairment					11,372,249	10,791,600
Loans outstanding - PCI loans					11,581,559	11,018,034
Loans outstanding - Total					11,672,784	11,102,857
Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			12,040
Balance, end of period	11,366		11,366
Allowance for loan losses - Total	11,366		12,040		11,366	12,040
Loans outstanding - PCI loans					182,772	196,908
Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Loans outstanding - Total					9,333,290	8,338,522
Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Provision (credit) for loan losses	(253)		(2,500)
Loans outstanding - Total					2,339,494	2,764,335
Real estate
Allowance for Loan Losses by Portfolio Segment
Loans outstanding - Total					8,512,740	8,508,222
Real estate | Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	45,977	43,929	45,360	38,956
Provision (credit) for loan losses	1,776	(2,596)	2,255	3,510
Loans charged off	(144)	(892)	(207)	(2,046)
Recoveries of charge offs	626	37	827	58
Balance, end of period	48,235	40,478	48,235	40,478
Allowance for loan losses - Individually evaluated for impairment					6,353	1,378
Allowance for loan losses - Collectively evaluated for impairment					41,882	43,982
Allowance for loan losses - Total	45,977	43,929	45,360	38,956	48,235	45,360
Loans outstanding - Individually evaluated for impairment					45,977	41,041
Loans outstanding - Collectively evaluated for impairment					6,446,113	6,172,448
Loans outstanding - Total					6,492,090	6,213,489
Real estate | Legacy Loans | Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - PCI loans					0	0
Real estate | Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	13,048	13,455	13,322	12,791
Provision (credit) for loan losses	(141)	(69)	(314)	906
Loans charged off	(92)	19	(194)	(317)
Recoveries of charge offs	1	6	2	31
Balance, end of period	12,816	13,411	12,816	13,411
Allowance for loan losses - Individually evaluated for impairment					305	246
Allowance for loan losses - Collectively evaluated for impairment					1,145	1,036
Allowance for loan losses - Total	13,048	13,455	13,322	12,791	12,816	13,322
Loans outstanding - Individually evaluated for impairment					15,218	14,239
Loans outstanding - Collectively evaluated for impairment					1,857,454	2,120,001
Loans outstanding - Total					2,020,650	2,294,733
Real estate | Acquired Loans | Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			12,040
Balance, end of period	11,366		11,366
Allowance for loan losses - Total	11,366		12,040		11,366	12,040
Loans outstanding - PCI loans					147,978	160,493
Commercial business
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			20,755
Balance, end of period	23,022		23,022
Allowance for loan losses - Total	23,022		20,755		23,022	20,755
Loans outstanding - Total					2,131,301	1,780,869
Commercial business | Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	20,387	17,479	17,228	23,430
Provision (credit) for loan losses	487	3,741	3,776	857
Loans charged off	(446)	(425)	(788)	(3,615)
Recoveries of charge offs	1,603	700	1,815	823
Balance, end of period	22,031	21,495	22,031	21,495
Allowance for loan losses - Individually evaluated for impairment					3,169	2,807
Allowance for loan losses - Collectively evaluated for impairment					18,862	14,421
Allowance for loan losses - Total	20,387	17,479	17,228	23,430	22,031	17,228
Loans outstanding - Individually evaluated for impairment					30,151	31,322
Loans outstanding - Collectively evaluated for impairment					1,939,901	1,459,273
Loans outstanding - Total					1,970,052	1,490,595
Commercial business | Legacy Loans | Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - PCI loans					0	0
Commercial business | Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	1,308	944	3,527	117
Provision (credit) for loan losses	(96)	374	(2,142)	1,122
Loans charged off	(352)	(55)	(566)	(125)
Recoveries of charge offs	131	28	172	177
Balance, end of period	991	1,291	991	1,291
Allowance for loan losses - Individually evaluated for impairment					511	854
Allowance for loan losses - Collectively evaluated for impairment					480	2,673
Allowance for loan losses - Total	1,308	944	3,527	117	991	3,527
Loans outstanding - Individually evaluated for impairment					16,800	18,733
Loans outstanding - Collectively evaluated for impairment					118,508	244,980
Loans outstanding - Total					161,249	290,274
Commercial business | Acquired Loans | Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - PCI loans					25,941	26,561
Trade finance
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			1,716
Balance, end of period	986		986
Allowance for loan losses - Total	986		1,716		986	1,716
Loans outstanding - Total					156,181	166,664
Trade finance | Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	1,767	624	1,674	1,897
Provision (credit) for loan losses	(796)	900	(715)	1,203
Loans charged off	0	(528)	0	(2,104)
Recoveries of charge offs	12	4	24	4
Balance, end of period	983	1,000	983	1,000
Allowance for loan losses - Individually evaluated for impairment					252	3
Allowance for loan losses - Collectively evaluated for impairment					731	1,671
Allowance for loan losses - Total	1,767	624	1,674	1,897	983	1,674
Loans outstanding - Individually evaluated for impairment					3,694	3,951
Loans outstanding - Collectively evaluated for impairment					149,012	152,204
Loans outstanding - Total					152,706	156,155
Trade finance | Legacy Loans | Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - PCI loans					0	0
Trade finance | Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	38	187	42	0
Provision (credit) for loan losses	(35)	(81)	(39)	106
Loans charged off	0	0	0	0
Recoveries of charge offs	0	0	0	0
Balance, end of period	3	106	3	106
Allowance for loan losses - Individually evaluated for impairment					0	0
Allowance for loan losses - Collectively evaluated for impairment					3	42
Allowance for loan losses - Total	38	187	42	0	3	42
Loans outstanding - Individually evaluated for impairment					2,961	2,984
Loans outstanding - Collectively evaluated for impairment					514	7,525
Loans outstanding - Total					3,475	10,509
Trade finance | Acquired Loans | Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - PCI loans					0	0
Consumer and other
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			3,388
Balance, end of period	4,822		4,822
Allowance for loan losses - Total	4,822		3,388		4,822	3,388
Loans outstanding - Total					872,562	647,102
Consumer and other | Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	3,934	2,022	3,385	2,116
Provision (credit) for loan losses	1,086	500	1,963	684
Loans charged off	(229)	(241)	(576)	(520)
Recoveries of charge offs	8	1	27	2
Balance, end of period	4,799	2,282	4,799	2,282
Allowance for loan losses - Individually evaluated for impairment					15	35
Allowance for loan losses - Collectively evaluated for impairment					4,784	3,350
Allowance for loan losses - Total	3,934	2,022	3,385	2,116	4,799	3,385
Loans outstanding - Individually evaluated for impairment					851	908
Loans outstanding - Collectively evaluated for impairment					717,591	477,375
Loans outstanding - Total					718,442	478,283
Consumer and other | Legacy Loans | Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - PCI loans					0	0
Consumer and other | Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	2	19	3	36
Provision (credit) for loan losses	19	(9)	16	(28)
Loans charged off	0	0	0	0
Recoveries of charge offs	2	1	4	3
Balance, end of period	23	11	23	11
Allowance for loan losses - Individually evaluated for impairment					1	0
Allowance for loan losses - Collectively evaluated for impairment					22	3
Allowance for loan losses - Total	2	$ 19	3	$ 36	23	3
Loans outstanding - Individually evaluated for impairment					2,111	1,171
Loans outstanding - Collectively evaluated for impairment					143,156	157,794
Loans outstanding - Total					154,120	168,819
Consumer and other | Acquired Loans | Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	$ 0		$ 0		0	0
Loans outstanding - PCI loans					$ 8,853	$ 9,854

Loans Receivable and Allowanc54

Loans Receivable and Allowance for Loan Losses - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)loan	Jun. 30, 2017USD ($)loan	Jun. 30, 2018USD ($)loanloan_pool	Jun. 30, 2017USD ($)loan	Dec. 31, 2017USD ($)
Receivables [Abstract]
Commitment to lend	$ 786,000		$ 786,000		$ 836,000
(Credit) provision for unfunded loan commitments	$ 150,000	$ 201,000	$ (50,000)	$ 442,000
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of non-homogeneous loan pools | loan_pool			19
Positive or negative qualitative adjustment of the Loss Migration Ratio	0.50%		0.50%
Provision (credit) for loan losses	$ 2,300,000	2,760,000	$ 4,800,000	8,360,000
Specific reserves TDRs	3,900,000		3,900,000		$ 4,800,000
Specific reserves	44,000	1,100,000	44,000	1,100,000
Specific reserves for the TDRs that had payment defaults	$ 33,000	$ 181,000	$ 33,000	$ 181,000
Number of Loans | loan	4	4	6	4
Balance	$ 1,188,000	$ 1,652,000	$ 4,296,000	$ 1,652,000
Acquired Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision (credit) for loan losses	(253,000)		(2,500,000)
Provision (credit) for PCI loan losses	(449,000)		(637,000)
Charge offs	$ 0	$ 131,000	$ 0	$ 131,000
Number of Loans | loan	0	1	2	1
Balance	$ 0	$ 10,000	$ 3,108,000	$ 10,000
Acquired Loans | Real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision (credit) for loan losses	$ (141,000)	$ (69,000)	$ (314,000)	$ 906,000
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Acquired Loans | Real estate | Payment concession
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans | loan			1
Balance			$ 3,100,000
Acquired Loans | Commercial business
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision (credit) for loan losses	$ (96,000)	$ 374,000	$ (2,142,000)	$ 1,122,000
Number of Loans | loan	0	1	1	1
Balance	$ 0	$ 10,000	$ 0	$ 10,000
Acquired Loans | Commercial business | Payment concession
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans | loan		1		1
Balance		$ 10,000		$ 10,000
Acquired Loans | Consumer and other
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Legacy Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Charge offs	$ 51,000	$ 0	$ 51,000	$ 131,000
Number of Loans | loan	4	3	4	3
Balance	$ 1,188,000	$ 1,642,000	$ 1,188,000	$ 1,642,000
Legacy Loans | Real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision (credit) for loan losses	$ 1,776,000	$ (2,596,000)	$ 2,255,000	$ 3,510,000
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Legacy Loans | Real estate | Payment concession
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans | loan		1		1
Balance		$ 796,000		$ 796,000
Legacy Loans | Commercial business
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision (credit) for loan losses	$ 487,000	$ 3,741,000	$ 3,776,000	$ 857,000
Number of Loans | loan	4	2	4	2
Balance	$ 1,188,000	$ 846,000	$ 1,188,000	$ 846,000
Legacy Loans | Commercial business | Maturity / amortization concession
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans | loan	4	2	4	2
Balance	$ 1,200,000	$ 846,000	$ 1,200,000	$ 846,000
Legacy Loans | Consumer and other
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Commercial real estate loan portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of non-homogeneous loan pools | loan_pool			14
Commercial and industrial loan portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of non-homogeneous loan pools | loan_pool			5
Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Scope for evaluation of individual impairment, maximum threshold	$ 500,000		$ 500,000

Loans Receivable and Allowanc55

Loans Receivable and Allowance for Loan Losses - Impaired Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	$ 49,380		$ 49,380		$ 31,658
Recorded Investment, With no related allowance	68,383		68,383		82,691
Related Allowance	10,606		10,606		5,323
Impaired Loans, net of allowance	107,157		107,157		109,026
Total recorded investment	117,763		117,763		114,349
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	51,935		51,935		39,604
Unpaid Contractual Principal Balance, With no related allowance	87,932		87,932		96,817
Impaired Financing Receivable, Unpaid Principal Balance	139,867		139,867		136,421
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	53,642	$ 45,934	46,314	$ 50,877
Average Recorded Investment, With no related allowance	69,272	69,187	69,230	72,658
Average Recorded Investment, Total	122,914	115,121	115,544	123,535
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	343	422	662	774
Interest Income Recognized during Impairment, With no related allowance	338	270	669	538
Interest Income Recognized during Impairment, Total	681	692	$ 1,331	1,312
Threshold period for loans to be placed on nonaccrual status			90 days
Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	10,643		$ 10,643		3,003
Recorded Investment, With no related allowance	26,447		26,447		34,124
Related Allowance	817		817		1,100
Total recorded investment	37,090		37,090		37,127
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	12,528		12,528		4,598
Unpaid Contractual Principal Balance, With no related allowance	31,316		31,316		39,468
Impaired Financing Receivable, Unpaid Principal Balance	43,844		43,844		44,066
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	15,802	2,503	11,538	2,534
Average Recorded Investment, With no related allowance	22,495	14,774	21,855	17,228
Average Recorded Investment, Total	38,297	17,277	33,393	19,762
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	101	10	195	18
Interest Income Recognized during Impairment, With no related allowance	162	33	306	66
Interest Income Recognized during Impairment, Total	263	43	501	84
Real estate | Residential
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	251		251		0
Recorded Investment, With no related allowance	0		0		0
Related Allowance	2		2		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	251		251		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	125	0	84	0
Average Recorded Investment, With no related allowance	0	732	0	1,675
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Residential | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	251		251		0
Recorded Investment, With no related allowance	0		0		0
Related Allowance	2		2		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	251		251		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	125	0	84	0
Average Recorded Investment, With no related allowance	0	0	0	226
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial
Impaired Loans, Recorded Investment
Related Allowance	6,656		6,656		1,624
Real estate | Commercial | Retail
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	7,790		7,790		532
Recorded Investment, With no related allowance	7,867		7,867		11,792
Related Allowance	5,662		5,662		131
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	8,027		8,027		531
Unpaid Contractual Principal Balance, With no related allowance	10,855		10,855		13,923
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	7,088	1,022	4,902	1,380
Average Recorded Investment, With no related allowance	10,917	13,214	11,209	13,060
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	7	4	15	7
Interest Income Recognized during Impairment, With no related allowance	36	82	71	161
Real estate | Commercial | Retail | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	1,093		1,093		262
Recorded Investment, With no related allowance	2,918		2,918		3,412
Related Allowance	182		182		126
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	1,106		1,106		261
Unpaid Contractual Principal Balance, With no related allowance	3,657		3,657		4,099
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	800	753	621	1,110
Average Recorded Investment, With no related allowance	3,108	2,903	3,209	2,985
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	4	0	7
Interest Income Recognized during Impairment, With no related allowance	31	15	61	30
Real estate | Commercial | Hotel & motel
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	2,758		2,758		2,931
Recorded Investment, With no related allowance	4,388		4,388		2,841
Related Allowance	860		860		284
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	3,055		3,055		5,090
Unpaid Contractual Principal Balance, With no related allowance	10,113		10,113		5,288
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	2,792	4,119	2,838	4,875
Average Recorded Investment, With no related allowance	3,713	9,545	3,423	8,404
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	16	0	32
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Hotel & motel | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	73		73		85
Recorded Investment, With no related allowance	1,573		1,573		482
Related Allowance	8		8		2
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	345		345		86
Unpaid Contractual Principal Balance, With no related allowance	2,991		2,991		1,887
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	79	176	81	117
Average Recorded Investment, With no related allowance	1,029	4,823	847	4,805
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Gas station & car wash
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	336		336		591
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	1,718		1,718		1,764
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	0	0	72
Average Recorded Investment, With no related allowance	542	3,633	558	4,103
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Gas station & car wash | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	188		188		1
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	708		708		28
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	0	0	0
Average Recorded Investment, With no related allowance	193	539	129	882
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Mixed use
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	3,012		3,012		312
Recorded Investment, With no related allowance	3,847		3,847		1,101
Related Allowance	15		15		4
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	3,071		3,071		958
Unpaid Contractual Principal Balance, With no related allowance	6,001		6,001		3,490
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	2,985	268	2,094	247
Average Recorded Investment, With no related allowance	2,475	3,879	2,017	5,020
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	39	2	75	3
Interest Income Recognized during Impairment, With no related allowance	50	0	100	0
Real estate | Commercial | Mixed use | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	2,839		2,839		129
Recorded Investment, With no related allowance	71		71		152
Related Allowance	14		14		1
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	2,839		2,839		129
Unpaid Contractual Principal Balance, With no related allowance	1,967		1,967		2,240
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	2,899	249	1,976	212
Average Recorded Investment, With no related allowance	36	2,664	74	3,548
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	39	2	75	3
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Industrial & warehouse
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	2,855		2,855		772
Recorded Investment, With no related allowance	11,165		11,165		8,429
Related Allowance	103		103		96
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	3,688		3,688		1,482
Unpaid Contractual Principal Balance, With no related allowance	12,127		12,127		8,525
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	2,616	1,692	2,002	1,305
Average Recorded Investment, With no related allowance	11,886	8,612	10,733	8,965
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	36	0	67	0
Interest Income Recognized during Impairment, With no related allowance	56	58	112	116
Real estate | Commercial | Industrial & warehouse | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	268		268		221
Recorded Investment, With no related allowance	119		119		45
Related Allowance	96		96		96
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	1,090		1,090		896
Unpaid Contractual Principal Balance, With no related allowance	894		894		45
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	266	251	251	168
Average Recorded Investment, With no related allowance	491	65	342	65
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	1	0
Interest Income Recognized during Impairment, With no related allowance	0	1	0	2
Real estate | Commercial | Other
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	3,918		3,918		4,397
Recorded Investment, With no related allowance	13,008		13,008		20,282
Related Allowance	16		16		1,109
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	4,304		4,304		4,401
Unpaid Contractual Principal Balance, With no related allowance	16,760		16,760		24,412
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	6,655	13,584	5,902	16,583
Average Recorded Investment, With no related allowance	13,587	14,173	15,819	16,176
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	24	60	47	117
Interest Income Recognized during Impairment, With no related allowance	112	81	233	162
Real estate | Commercial | Other | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	1,313		1,313		319
Recorded Investment, With no related allowance	4,512		4,512		9,131
Related Allowance	3		3		21
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	1,313		1,313		323
Unpaid Contractual Principal Balance, With no related allowance	5,281		5,281		9,951
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	3,314	330	2,316	333
Average Recorded Investment, With no related allowance	4,475	2,931	6,027	3,961
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	19	4	37	8
Interest Income Recognized during Impairment, With no related allowance	60	8	117	16
Real estate | Construction
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	0		0		1,300
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		1,441
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	0	0	0
Average Recorded Investment, With no related allowance	650	2,078	867	1,819
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Construction | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	0		0		0
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	0	0	0
Average Recorded Investment, With no related allowance	0	0	0	0
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Commercial business
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	24,098		24,098		18,330
Recorded Investment, With no related allowance	22,853		22,853		31,725
Related Allowance	3,680		3,680		3,661
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	25,806		25,806		22,757
Unpaid Contractual Principal Balance, With no related allowance	27,248		27,248		33,207
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	27,487	23,154	24,435	24,284
Average Recorded Investment, With no related allowance	20,530	9,953	19,752	9,527
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	168	233	331	456
Interest Income Recognized during Impairment, With no related allowance	37	41	63	83
Commercial business | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	4,653		4,653		1,987
Recorded Investment, With no related allowance	12,147		12,147		16,746
Related Allowance	511		511		854
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	5,584		5,584		2,903
Unpaid Contractual Principal Balance, With no related allowance	12,708		12,708		16,926
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	8,243	744	6,158	594
Average Recorded Investment, With no related allowance	8,380	408	6,660	319
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	41	0	80	0
Interest Income Recognized during Impairment, With no related allowance	24	7	38	14
Trade finance
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	3,694		3,694		3,861
Recorded Investment, With no related allowance	2,961		2,961		3,074
Related Allowance	252		252		3
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	3,694		3,694		3,861
Unpaid Contractual Principal Balance, With no related allowance	2,961		2,961		3,091
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	3,146	2,018	3,384	2,049
Average Recorded Investment, With no related allowance	3,165	2,298	3,134	2,838
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	63	106	121	157
Interest Income Recognized during Impairment, With no related allowance	47	2	90	3
Trade finance | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	2,961		2,961		2,984
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	2,961		2,961		3,001
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	0	0	0
Average Recorded Investment, With no related allowance	3,165	0	3,104	0
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	47	0	90	0
Consumer and other
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	1,004		1,004		523
Recorded Investment, With no related allowance	1,958		1,958		1,556
Related Allowance	16		16		35
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	39		39		524
Unpaid Contractual Principal Balance, With no related allowance	149		149		1,676
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	748	77	673	82
Average Recorded Investment, With no related allowance	1,807	1,070	1,718	1,071
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	6	1	6	2
Interest Income Recognized during Impairment, With no related allowance	0	6	0	13
Consumer and other | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	153		153		0
Recorded Investment, With no related allowance	1,958		1,958		1,171
Related Allowance	1		1		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	149		149		1,291
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	76	0	51	0
Average Recorded Investment, With no related allowance	1,618	441	1,463	437
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	2	0	2	0
Interest Income Recognized during Impairment, With no related allowance	0	$ 2	0	$ 4
WIthout charge-offs
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	48,192		48,192		28,614
Recorded Investment, With no related allowance	61,806		61,806		77,533
With charge-offs
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	1,188		1,188		3,044
Recorded Investment, With no related allowance	$ 6,577		$ 6,577		$ 5,158

Loans Receivable and Allowanc56

Loans Receivable and Allowance for Loan Losses - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 68,226	$ 46,775
Accruing loans past due 90 or more days	3,030	407
Guaranteed portion of delinquent SBA loans excluded from Nonaccrual loans	26,000	22,100
Past due loans	54,110	43,948
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	20,467	21,465
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	10,968	4,150
90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	22,675	18,333
Legacy Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	49,468	28,235
Accruing loans past due 90 or more days	3,030	407
Past due loans	43,347	35,339
Legacy Loans | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	13,267	16,948
Legacy Loans | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	10,832	1,884
Legacy Loans | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	19,248	16,507
Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	18,758	18,540
Accruing loans past due 90 or more days	0	0
Past due loans	10,763	8,609
Acquired Loans | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	7,200	4,517
Acquired Loans | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	136	2,266
Acquired Loans | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,427	1,826
Residential | Legacy Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Residential | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	251	0
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	10,883	3,179
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	5,501	3,931
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	149	590
Accruing loans past due 90 or more days	2,564	0
Commercial | Legacy Loans | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	762	1,132
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	6,195	3,403
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	6,581	5,689
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,319	638
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,645	568
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	188	1
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	71	152
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	363	221
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	630	1,389
Accruing loans past due 90 or more days	0	0
Construction | Legacy Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	0	1,300
Accruing loans past due 90 or more days	0	0
Construction | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Commercial business | Legacy Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	18,916	8,540
Accruing loans past due 90 or more days	39	0
Past due loans	15,366	3,722
Commercial business | Legacy Loans | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	6,312	698
Commercial business | Legacy Loans | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,453	516
Commercial business | Legacy Loans | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	7,601	2,508
Commercial business | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	12,333	14,560
Accruing loans past due 90 or more days	0	0
Past due loans	1,411	2,229
Commercial business | Acquired Loans | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	214	1,088
Commercial business | Acquired Loans | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	136	256
Commercial business | Acquired Loans | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,061	885
Trade finance | Legacy Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Past due loans	649	0
Trade finance | Legacy Loans | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	649	0
Trade finance | Legacy Loans | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Trade finance | Legacy Loans | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Trade finance | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Past due loans	0	0
Trade finance | Acquired Loans | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Trade finance | Acquired Loans | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Trade finance | Acquired Loans | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Consumer and other | Legacy Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	481	471
Accruing loans past due 90 or more days	427	407
Consumer and other | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,958	1,011
Accruing loans past due 90 or more days	0	0
Consumer and other | Legacy Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,342	8,103
Consumer and other | Legacy Loans | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,802	7,512
Consumer and other | Legacy Loans | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	113	97
Consumer and other | Legacy Loans | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	427	494
Consumer and other | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,258	1,408
Consumer and other | Acquired Loans | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,826	957
Consumer and other | Acquired Loans | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	270
Consumer and other | Acquired Loans | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	432	181
Real estate | Legacy Loans | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Residential | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Residential | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Residential | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	1,300
Real estate | Legacy Loans | Construction | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Construction | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Construction | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	1,300
Real estate | Legacy Loans | Retail | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,899	3,524
Real estate | Legacy Loans | Retail | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	810	3,239
Real estate | Legacy Loans | Retail | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,262	0
Real estate | Legacy Loans | Retail | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	827	285
Real estate | Legacy Loans | Hotel & motel | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	8,491	5,691
Real estate | Legacy Loans | Hotel & motel | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,493	1,884
Real estate | Legacy Loans | Hotel & motel | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,534	1,172
Real estate | Legacy Loans | Hotel & motel | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,464	2,635
Real estate | Legacy Loans | Gas station & car wash | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,598	1,391
Real estate | Legacy Loans | Gas station & car wash | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	956
Real estate | Legacy Loans | Gas station & car wash | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Gas station & car wash | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,598	435
Real estate | Legacy Loans | Mixed use | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	779	1,081
Real estate | Legacy Loans | Mixed use | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	129
Real estate | Legacy Loans | Mixed use | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	189	0
Real estate | Legacy Loans | Mixed use | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	590	952
Real estate | Legacy Loans | Industrial & warehouse | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,705	3,693
Real estate | Legacy Loans | Industrial & warehouse | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	118	1,121
Real estate | Legacy Loans | Industrial & warehouse | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,115	99
Real estate | Legacy Loans | Industrial & warehouse | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,472	2,473
Real estate | Legacy Loans | Other | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	5,518	6,834
Real estate | Legacy Loans | Other | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	83	1,409
Real estate | Legacy Loans | Other | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,166	0
Real estate | Legacy Loans | Other | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,269	5,425
Real estate | Acquired Loans | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	251	0
Real estate | Acquired Loans | Residential | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Residential | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Residential | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	251	0
Real estate | Acquired Loans | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Construction | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Construction | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Construction | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Retail | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	901	683
Real estate | Acquired Loans | Retail | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	33	81
Real estate | Acquired Loans | Retail | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	216
Real estate | Acquired Loans | Retail | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	868	386
Real estate | Acquired Loans | Hotel & motel | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	4,171	1,219
Real estate | Acquired Loans | Hotel & motel | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	4,098	0
Real estate | Acquired Loans | Hotel & motel | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	1,219
Real estate | Acquired Loans | Hotel & motel | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	73	0
Real estate | Acquired Loans | Gas station & car wash | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	283	1,203
Real estate | Acquired Loans | Gas station & car wash | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	123	1,161
Real estate | Acquired Loans | Gas station & car wash | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	41
Real estate | Acquired Loans | Gas station & car wash | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	160	1
Real estate | Acquired Loans | Mixed use | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	71	303
Real estate | Acquired Loans | Mixed use | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	151
Real estate | Acquired Loans | Mixed use | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Mixed use | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	71	152
Real estate | Acquired Loans | Industrial & warehouse | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	363	1,289
Real estate | Acquired Loans | Industrial & warehouse | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	804
Real estate | Acquired Loans | Industrial & warehouse | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	264
Real estate | Acquired Loans | Industrial & warehouse | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	363	221
Real estate | Acquired Loans | Other | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,054	275
Real estate | Acquired Loans | Other | Commercial | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	906	275
Real estate | Acquired Loans | Other | Commercial | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Other | Commercial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	$ 148	$ 0

Loans Receivable and Allowanc57

Loans Receivable and Allowance for Loan Losses - Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 11,672,784	$ 11,102,857
Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	11,175,619	10,534,382
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	139,494	214,891
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	351,400	353,222
Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	6,271	362
Real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	8,512,740	8,508,222
Real estate | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	45,383	49,774
Real estate | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	8,165,420	8,142,036
Real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	301,937	316,412
Commercial business
Financing Receivable, Recorded Investment [Line Items]
Loans	2,131,301	1,780,869
Trade finance
Financing Receivable, Recorded Investment [Line Items]
Loans	156,181	166,664
Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans	872,562	647,102
Legacy Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	9,333,290	8,338,522
Legacy Loans | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	9,034,216	8,007,314
Legacy Loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	101,435	151,413
Legacy Loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	191,787	179,795
Legacy Loans | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	5,852	0
Legacy Loans | Real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	6,492,090	6,213,489
Legacy Loans | Real estate | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	33,592	36,143
Legacy Loans | Real estate | Residential | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	32,669	33,557
Legacy Loans | Real estate | Residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	519	1,147
Legacy Loans | Real estate | Residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	404	1,439
Legacy Loans | Real estate | Residential | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Retail
Financing Receivable, Recorded Investment [Line Items]
Loans	1,731,633	1,691,388
Legacy Loans | Real estate | Commercial | Retail | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	1,691,312	1,640,809
Legacy Loans | Real estate | Commercial | Retail | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	9,333	32,723
Legacy Loans | Real estate | Commercial | Retail | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	25,527	17,856
Legacy Loans | Real estate | Commercial | Retail | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	5,461	0
Legacy Loans | Real estate | Commercial | Hotel & motel
Financing Receivable, Recorded Investment [Line Items]
Loans	1,273,156	1,252,832
Legacy Loans | Real estate | Commercial | Hotel & motel | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	1,245,407	1,224,597
Legacy Loans | Real estate | Commercial | Hotel & motel | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	13,004	19,358
Legacy Loans | Real estate | Commercial | Hotel & motel | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	14,745	8,877
Legacy Loans | Real estate | Commercial | Hotel & motel | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Gas station & car wash
Financing Receivable, Recorded Investment [Line Items]
Loans	783,556	747,088
Legacy Loans | Real estate | Commercial | Gas station & car wash | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	774,954	737,485
Legacy Loans | Real estate | Commercial | Gas station & car wash | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	5,686	9,013
Legacy Loans | Real estate | Commercial | Gas station & car wash | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	2,916	590
Legacy Loans | Real estate | Commercial | Gas station & car wash | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Mixed use
Financing Receivable, Recorded Investment [Line Items]
Loans	469,738	427,813
Legacy Loans | Real estate | Commercial | Mixed use | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	456,488	421,755
Legacy Loans | Real estate | Commercial | Mixed use | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	6,971	4,581
Legacy Loans | Real estate | Commercial | Mixed use | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	6,279	1,477
Legacy Loans | Real estate | Commercial | Mixed use | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Industrial & warehouse
Financing Receivable, Recorded Investment [Line Items]
Loans	668,712	618,377
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	625,276	577,344
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	13,527	16,716
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	29,909	24,317
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Other
Financing Receivable, Recorded Investment [Line Items]
Loans	1,315,204	1,217,213
Legacy Loans | Real estate | Commercial | Other | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	1,249,912	1,133,188
Legacy Loans | Real estate | Commercial | Other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	30,779	30,030
Legacy Loans | Real estate | Commercial | Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	34,513	53,995
Legacy Loans | Real estate | Commercial | Other | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy Loans | Real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	216,499	222,635
Legacy Loans | Real estate | Construction | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	208,671	219,583
Legacy Loans | Real estate | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	6,076	0
Legacy Loans | Real estate | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	1,752	3,052
Legacy Loans | Real estate | Construction | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy Loans | Commercial business
Financing Receivable, Recorded Investment [Line Items]
Loans	1,970,052	1,490,595
Legacy Loans | Commercial business | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	1,885,670	1,389,043
Legacy Loans | Commercial business | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	11,048	35,640
Legacy Loans | Commercial business | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	72,943	65,912
Legacy Loans | Commercial business | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	391	0
Legacy Loans | Trade finance
Financing Receivable, Recorded Investment [Line Items]
Loans	152,706	156,155
Legacy Loans | Trade finance | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	146,267	152,583
Legacy Loans | Trade finance | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	4,491	2,200
Legacy Loans | Trade finance | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	1,948	1,372
Legacy Loans | Trade finance | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy Loans | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans	718,442	478,283
Legacy Loans | Consumer and other | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	717,590	477,370
Legacy Loans | Consumer and other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	1	5
Legacy Loans | Consumer and other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	851	908
Legacy Loans | Consumer and other | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	2,339,494	2,764,335
Acquired Loans | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	2,141,403	2,527,068
Acquired Loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	38,059	63,478
Acquired Loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	159,613	173,427
Acquired Loans | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	419	362
Acquired Loans | Real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	2,020,650	2,294,733
Acquired Loans | Real estate | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	11,791	13,631
Acquired Loans | Real estate | Residential | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	11,283	13,369
Acquired Loans | Real estate | Residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	262
Acquired Loans | Real estate | Residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	508	0
Acquired Loans | Real estate | Residential | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Retail
Financing Receivable, Recorded Investment [Line Items]
Loans	570,197	658,273
Acquired Loans | Real estate | Commercial | Retail | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	549,238	630,555
Acquired Loans | Real estate | Commercial | Retail | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	2,567	6,921
Acquired Loans | Real estate | Commercial | Retail | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	18,392	20,797
Acquired Loans | Real estate | Commercial | Retail | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Hotel & motel
Financing Receivable, Recorded Investment [Line Items]
Loans	273,537	304,425
Acquired Loans | Real estate | Commercial | Hotel & motel | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	247,404	275,191
Acquired Loans | Real estate | Commercial | Hotel & motel | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	3,254	4,247
Acquired Loans | Real estate | Commercial | Hotel & motel | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	22,879	24,987
Acquired Loans | Real estate | Commercial | Hotel & motel | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Gas station & car wash
Financing Receivable, Recorded Investment [Line Items]
Loans	180,282	205,927
Acquired Loans | Real estate | Commercial | Gas station & car wash | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	171,446	194,063
Acquired Loans | Real estate | Commercial | Gas station & car wash | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	279	2,872
Acquired Loans | Real estate | Commercial | Gas station & car wash | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	8,557	8,992
Acquired Loans | Real estate | Commercial | Gas station & car wash | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Mixed use
Financing Receivable, Recorded Investment [Line Items]
Loans	100,889	115,327
Acquired Loans | Real estate | Commercial | Mixed use | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	87,724	94,864
Acquired Loans | Real estate | Commercial | Mixed use | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	2,135	5,725
Acquired Loans | Real estate | Commercial | Mixed use | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	11,030	14,738
Acquired Loans | Real estate | Commercial | Mixed use | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Industrial & warehouse
Financing Receivable, Recorded Investment [Line Items]
Loans	249,395	281,645
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	221,227	250,049
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	10,147	14,973
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	17,773	16,358
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	248	265
Acquired Loans | Real estate | Commercial | Other
Financing Receivable, Recorded Investment [Line Items]
Loans	549,121	621,728
Acquired Loans | Real estate | Commercial | Other | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	508,871	568,545
Acquired Loans | Real estate | Commercial | Other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	13,623	19,848
Acquired Loans | Real estate | Commercial | Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	26,627	33,335
Acquired Loans | Real estate | Commercial | Other | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	85,438	93,777
Acquired Loans | Real estate | Construction | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	81,051	93,777
Acquired Loans | Real estate | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	4,387	0
Acquired Loans | Real estate | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Real estate | Construction | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Commercial business
Financing Receivable, Recorded Investment [Line Items]
Loans	161,249	290,274
Acquired Loans | Commercial business | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	115,026	236,705
Acquired Loans | Commercial business | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	1,628	8,593
Acquired Loans | Commercial business | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	44,577	44,964
Acquired Loans | Commercial business | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	18	12
Acquired Loans | Trade finance
Financing Receivable, Recorded Investment [Line Items]
Loans	3,475	10,509
Acquired Loans | Trade finance | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	514	7,455
Acquired Loans | Trade finance | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Trade finance | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	2,961	3,054
Acquired Loans | Trade finance | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans	154,120	168,819
Acquired Loans | Consumer and other | Pass/Not Rated
Financing Receivable, Recorded Investment [Line Items]
Loans	147,619	162,495
Acquired Loans | Consumer and other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	39	37
Acquired Loans | Consumer and other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	6,309	6,202
Acquired Loans | Consumer and other | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 153	$ 85

Loans Receivable and Allowanc58

Loans Receivable and Allowance for Loan Losses - Loans Held For Investment - Reclassification to Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	$ 0	$ 5,139	$ 6,155	$ 14,590
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	0	2,671	0	11,370
Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	0	2,243	0	2,995
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	$ 0	$ 225	$ 6,155	$ 225

Loans Receivable and Allowanc59

Loans Receivable and Allowance for Loan Losses - Allowance for Loans, by Portfolio Segment and Impairment Method (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 117,763		$ 114,349
Specific allowance	$ 10,606		$ 5,323
Specific allowance to impaired loans	9.01%		4.66%
Other loans	$ 11,555,021		$ 10,988,508
General allowance	$ 79,275		$ 79,218
General allowance to other loans	0.69%		0.72%
Total loans	$ 11,672,784		$ 11,102,857
Total allowance for loan losses	$ 89,881	$ 86,461	$ 84,541	$ 80,074	$ 78,659	$ 79,343
Total allowance to total loans	0.77%		0.76%
Real estate
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	$ 8,512,740		$ 8,508,222
Real estate | Residential
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	251		0
Specific allowance	$ 2		0
Specific allowance to impaired loans	0.80%
Other loans	$ 45,132		49,774
General allowance	$ 47		$ 88
General allowance to other loans	0.10%		0.18%
Total loans	$ 45,383		$ 49,774
Total allowance for loan losses	$ 49		$ 88
Total allowance to total loans	0.11%		0.18%
Real estate | Commercial
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 60,944		$ 53,980
Specific allowance	$ 6,656		$ 1,624
Specific allowance to impaired loans	10.92%		3.01%
Other loans	$ 8,104,476		$ 8,088,056
General allowance	$ 53,925		$ 56,040
General allowance to other loans	0.67%		0.69%
Total loans	$ 8,165,420		$ 8,142,036
Total allowance for loan losses	$ 60,581		$ 57,664
Total allowance to total loans	0.74%		0.71%
Real estate | Construction
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 0		$ 1,300
Specific allowance	0		0
Other loans	301,937		315,112
General allowance	$ 421		$ 930
General allowance to other loans	0.14%		0.30%
Total loans	$ 301,937		$ 316,412
Total allowance for loan losses	$ 421		$ 930
Total allowance to total loans	0.14%		0.29%
Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 46,951		$ 50,055
Specific allowance	$ 3,680		$ 3,661
Specific allowance to impaired loans	7.84%		7.31%
Other loans	$ 2,084,350		$ 1,730,814
General allowance	$ 19,342		$ 17,094
General allowance to other loans	0.93%		0.99%
Total loans	$ 2,131,301		$ 1,780,869
Total allowance for loan losses	$ 23,022		$ 20,755
Total allowance to total loans	1.08%		1.17%
Trade finance
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 6,655		$ 6,935
Specific allowance	$ 252		$ 3
Specific allowance to impaired loans	3.79%		0.04%
Other loans	$ 149,526		$ 159,729
General allowance	$ 734		$ 1,713
General allowance to other loans	0.49%		1.07%
Total loans	$ 156,181		$ 166,664
Total allowance for loan losses	$ 986		$ 1,716
Total allowance to total loans	0.63%		1.03%
Consumer and other
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 2,962		$ 2,079
Specific allowance	$ 16		$ 35
Specific allowance to impaired loans	0.54%		1.68%
Other loans	$ 869,600		$ 645,023
General allowance	$ 4,806		$ 3,353
General allowance to other loans	0.55%		0.52%
Total loans	$ 872,562		$ 647,102
Total allowance for loan losses	$ 4,822		$ 3,388
Total allowance to total loans	0.55%		0.52%

Loans Receivable and Allowanc60

Loans Receivable and Allowance for Loan Losses - Troubled Debt Restructurings on Financing Receivables (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018USD ($)loan	Jun. 30, 2017USD ($)loan	Jun. 30, 2018USD ($)loan	Jun. 30, 2017USD ($)loan	Dec. 31, 2017USD ($)loan
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	$ 69,620		$ 69,620		$ 78,490
Number of modified contracts | loan	14	5	23	10
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 4,302	$ 5,981	$ 15,262	$ 8,403
Post-Modification	$ 4,302	$ 5,929	$ 15,262	$ 7,743
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	4	4	6	4
Balance	$ 1,188	$ 1,652	$ 4,296	$ 1,652
Minimum
Financing Receivable, Modifications [Line Items]
Temporary modifications, period of interest only payments			3 months
Maximum
Financing Receivable, Modifications [Line Items]
Temporary modifications, period of interest only payments			6 months
Legacy Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	12	4	18	6
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 2,954	$ 5,853	$ 9,946	$ 7,533
Post-Modification	$ 2,954	$ 5,804	$ 9,946	$ 7,020
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	4	3	4	3
Balance	$ 1,188	$ 1,642	$ 1,188	$ 1,642
Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	2	1	5	4
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 1,348	$ 128	$ 5,316	$ 870
Post-Modification	$ 1,348	$ 125	$ 5,316	$ 723
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	1	2	1
Balance	$ 0	$ 10	$ 3,108	$ 10
Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	15,791		15,791		26,167
Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	46,903		46,903		44,692
Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	6,926		6,926		7,631
TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	49,219		49,219		67,250
TDR on accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	12,230		12,230		22,926
TDR on accrual | Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	31,083		31,083		37,794
TDR on accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	5,906		5,906		6,530
TDR on non-accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	20,401		20,401		11,240
TDR on non-accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	3,561		3,561		3,241
TDR on non-accrual | Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	15,820		15,820		6,898
TDR on non-accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	$ 1,020		$ 1,020		1,101
Commercial | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured					$ 32,800
Number of modified contracts | loan			21		24
Real estate | Legacy Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Residential Real Estate
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Retail
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	1	1	2	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 54	$ 660	$ 66	$ 660
Post-Modification	$ 54	$ 641	$ 66	$ 641
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Hotel & motel
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Gas station & car wash
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Mixed use
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Industrial & warehouse
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	1	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 2,093	$ 0
Post-Modification	$ 0	$ 0	$ 2,093	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Other
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	1	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 1,231	$ 0
Post-Modification	$ 0	$ 0	$ 1,231	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	1	0	1
Balance	$ 0	$ 796	$ 0	$ 796
Real estate | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Residential Real Estate
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Retail
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	1	1	2
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 128	$ 207	$ 221
Post-Modification	$ 0	$ 125	$ 207	$ 220
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Hotel & motel
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Gas station & car wash
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Mixed use
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	1	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 2,714	$ 0
Post-Modification	$ 0	$ 0	$ 2,714	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Industrial & warehouse
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Other
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	1	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 1,047	$ 0
Post-Modification	$ 0	$ 0	$ 1,047	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	1	0
Balance	$ 0	$ 0	$ 3,108	$ 0
Real estate | Payment concession | Legacy Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan		1		1
Balance		$ 796		$ 796
Real estate | Payment concession | Acquired Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan			1
Balance			$ 3,100
Real estate | Commercial | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	26,340		26,340		$ 32,762
Real estate | Commercial | TDR on accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	11,003		11,003		22,550
Real estate | Commercial | TDR on accrual | Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	10,367		10,367		4,768
Real estate | Commercial | TDR on accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	4,970		4,970		5,444
Real estate | Commercial | TDR on non-accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	4,594		4,594		5,690
Real estate | Commercial | TDR on non-accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	3,023		3,023		3,071
Real estate | Commercial | TDR on non-accrual | Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	551		551		1,536
Real estate | Commercial | TDR on non-accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	$ 1,020		$ 1,020		1,083
Commercial business | Legacy Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	10	3	13	5
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 2,830	$ 5,193	$ 6,486	$ 6,873
Post-Modification	$ 2,830	$ 5,163	$ 6,486	$ 6,379
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	4	2	4	2
Balance	$ 1,188	$ 846	$ 1,188	$ 846
Commercial business | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	2	0	2	2
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 1,348	$ 0	$ 1,348	$ 649
Post-Modification	$ 1,348	$ 0	$ 1,348	$ 503
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	1	1	1
Balance	$ 0	$ 10	$ 0	$ 10
Commercial business | Payment concession | Acquired Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan		1		1
Balance		$ 10		$ 10
Commercial business | Maturity / amortization concession | Legacy Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	4	2	4	2
Balance	$ 1,200	$ 846	$ 1,200	$ 846
Commercial business | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	15,701		$ 15,701		$ 26,956
Number of modified contracts | loan			35		27
Commercial business | TDR on accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	1,227		$ 1,227		$ 376
Commercial business | TDR on accrual | Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	13,638		13,638		25,584
Commercial business | TDR on accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	836		836		996
Commercial business | TDR on non-accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	15,608		15,608		5,452
Commercial business | TDR on non-accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	538		538		170
Commercial business | TDR on non-accrual | Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	15,070		15,070		5,264
Commercial business | TDR on non-accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	$ 0		$ 0		18
Trade finance | Legacy Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Trade finance | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Other | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	7,178		7,178		7,532
Other | TDR on accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0		0
Other | TDR on accrual | Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	7,078		7,078		7,442
Other | TDR on accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	100		100		90
Other | TDR on non-accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	199		199		98
Other | TDR on non-accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0		0
Other | TDR on non-accrual | Maturity / amortization concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	199		199		98
Other | TDR on non-accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	$ 0		$ 0		0
Consumer and other | Legacy Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	1	0	1	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 70	$ 0	$ 70	$ 0
Post-Modification	$ 70	$ 0	$ 70	$ 0
Consumer and other | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	0	$ 0	0	$ 0
Consumer and other | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	$ 7,200		$ 7,200		$ 7,500
Number of modified contracts | loan			43		56
Consumer and other | Legacy Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Consumer and other | Acquired Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0

Deposits (Details)

Deposits (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	$ 1,540,000,000	$ 1,280,000,000
Securities pledged as collateral	0
California State Treasurer
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	300,000,000	300,000,000
Securities pledged as collateral	337,500,000	337,700,000
Brokered deposits	1,200,000,000	797,000,000
Money market and NOW accounts | California State Treasurer
Deposits Disclosure [Line Items]
Brokered deposits	257,900,000	258,500,000
Time deposits | California State Treasurer
Deposits Disclosure [Line Items]
Brokered deposits	$ 938,900,000	$ 538,500,000

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Percent of assets	25.00%
Maximum borrowing capacity	$ 3,630,000,000	$ 3,540,000,000
Percent outstanding advances	100.00%
FHLB advances	$ 836,994,000	1,160,000,000
Unused funds	2,760,000,000
Federal funds purchased	$ 0	$ 69,900,000
Percent of qualifying assets	95.00%
Securities pledged as collateral	$ 0
Weighted Average
Debt Instrument [Line Items]
FHLB advances, interest rate	1.76%	1.63%
Minimum
Debt Instrument [Line Items]
FHLB advances, interest rate	1.06%
Maximum
Debt Instrument [Line Items]
FHLB advances, interest rate	2.39%
Mortgage Loans on Real Estate
Debt Instrument [Line Items]
Pledged as collateral	$ 5,820,000,000	$ 4,910,000,000
Qualifying Loans
Debt Instrument [Line Items]
Asset balance used to determine maximum borrowing capacity from federal reserve bank	791,500,000
Securities Investment
Debt Instrument [Line Items]
Total available borrowing capacity	609,100,000	564,600,000
Amount outstanding	$ 0	$ 0

Borrowings - Maturities of FHLB

Borrowings - Maturities of FHLB Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,018	$ 40,000
2,019	320,000
2,020	185,000
2,021	145,000
2022 and thereafter	145,000
Premium on acquired advances - no maturity	1,994
Total Balance	$ 836,994	$ 1,160,000

Subordinated Debentures and C64

Subordinated Debentures and Convertible Notes - Narrative (Details) $ / shares in Units, shares in Millions	Jun. 07, 2018USD ($)$ / shares	Apr. 26, 2018USD ($)	Jun. 30, 2018USD ($)grantor_trustshares	Jun. 30, 2018USD ($)grantor_trust$ / sharesshares	Jun. 30, 2017USD ($)	May 11, 2018USD ($)
Subordinated Borrowing [Line Items]
Number of wholly owned subsidiary grantor trusts | grantor_trust			9	9
Amount of pooled trust preferred securities issued			$ 126,000,000	$ 126,000,000
Right to defer consecutive payments of interest, maximum term				5 years
Proceeds from convertible notes, net of issuance fees				$ 212,920,000	$ 0
Repurchase of treasury stock			$ 79,000,000	$ 78,961,000
Common stock repurchased and recorded as treasury stock (in shares) | shares			4.4	4.4
Weighted average price of repurchased shares (in dollars per share) | $ / shares				$ 18.1032
Other assets
Subordinated Borrowing [Line Items]
Investment in common trust securities			$ 3,900,000	$ 3,900,000
Trust Preferred Securities Subject to Mandatory Redemption
Subordinated Borrowing [Line Items]
Amount of pooled trust preferred securities issued			$ 126,000,000	$ 126,000,000
Percent included in tier one capital, maximum			25.00%	25.00%
Excess of percent threshold included in tier two capital			25.00%	25.00%
Convertible Notes
Subordinated Borrowing [Line Items]
Aggregate principal amount issued			$ 217,500,000	$ 217,500,000		$ 200,000,000
Interest rate						2.00%
Additional face amount issued as part of initial offering over-allotment option	$ 17,500,000
Initial conversion rate	0.0450760		0.0450760
Initial conversion price (in dollars per share) | $ / shares	$ 22.18
Premium percentage to closing stock price on date of pricing of the notes	22.50%
Call option, percentage of principal amount in cash	100.00%
Repurchase or put option, percentage of principal amount in cash	100.00%
Amount of proceeds from convertible notes authorized for repurchase of common stock	$ 100,000,000	$ 100,000,000
Proceeds from convertible notes, net of issuance fees	213,200,000
Proceeds down-streamed to the Bank as equity	113,200,000
Repurchase of treasury stock	$ 76,000,000
Closing price of common stock (in dollars per share) | $ / shares	$ 18.11
Discount rate	4.25%
Amortization/ Capitalization Period	5 years			5 years
Interest expense on convertible notes			$ 1,200,000	$ 1,200,000

Subordinated Debentures and C65

Subordinated Debentures and Convertible Notes - Summary of Trust Preferred Securities and Debentures (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 126,000,000
Carrying Value of Debentures	101,386,000	$ 100,853,000
Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	126,000,000
Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 101,386,000
Nara Capital Trust III
Subordinated Borrowing [Line Items]
Current Rate	5.49%
Nara Capital Trust III | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 5,000,000
Nara Capital Trust III | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 5,155,000
Nara Statutory Trust IV
Subordinated Borrowing [Line Items]
Current Rate	5.20%
Nara Statutory Trust IV | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 5,000,000
Nara Statutory Trust IV | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 5,155,000
Nara Statutory Trust V
Subordinated Borrowing [Line Items]
Current Rate	5.28%
Nara Statutory Trust V | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 10,000,000
Nara Statutory Trust V | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 10,310,000
Nara Statutory Trust VI
Subordinated Borrowing [Line Items]
Current Rate	3.99%
Nara Statutory Trust VI | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 8,000,000
Nara Statutory Trust VI | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 8,248,000
Center Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	5.20%
Center Capital Trust I | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 18,000,000
Center Capital Trust I | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 13,924,000
Wilshire Statutory Trust II
Subordinated Borrowing [Line Items]
Current Rate	4.12%
Wilshire Statutory Trust II | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 20,000,000
Wilshire Statutory Trust II | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 15,419,000
Wilshire Statutory Trust III
Subordinated Borrowing [Line Items]
Current Rate	3.74%
Wilshire Statutory Trust III | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 15,000,000
Wilshire Statutory Trust III | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 10,857,000
Wilshire Statutory Trust IV
Subordinated Borrowing [Line Items]
Current Rate	3.72%
Wilshire Statutory Trust IV | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 25,000,000
Wilshire Statutory Trust IV | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 17,618,000
Saehan Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	3.96%
Saehan Capital Trust I | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 20,000,000
Saehan Capital Trust I | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 14,700,000

Subordinated Debentures and C66

Subordinated Debentures and Convertible Notes - Schedule of Convertible Debt (Details) - Convertible Notes - USD ($) $ in Thousands	Jun. 07, 2018	Jun. 30, 2018
Debt Instrument [Line Items]
Amortization/ Capitalization Period	5 years	5 years
Gross Carrying Amount
Convertible notes principal balance		$ 217,500
Discount		(21,880)
Issuance costs to be capitalized		(4,119)
Carrying balance of convertible notes		191,501
Accumulated Amortization / Capitalization
Discount		518
Issuance costs to be capitalized		101
Carrying balance of convertible notes		619
Carrying Amount
Convertible notes principal balance		217,500
Discount		(21,362)
Issuance costs to be capitalized		(4,018)
Carrying balance of convertible notes		$ 192,120

Derivative Financial Instrume67

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted average remaining term	6 years 9 months 18 days	7 years 3 months 18 days
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount, derivative asset	$ 298,082	$ 274,156
Notional amount, derivative liability	298,082	274,156
Interest rate lock commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount, derivative asset	2,107	4,795
Notional amount, derivative liability	0	0
Notional amount	$ 2,107	$ 4,795
Customers
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Received fixed rate (weighted average)	4.41%	4.34%
Pay variable rate (weighted average)	4.27%	3.74%
Estimated fair value	$ (10,534)	$ (2,838)
Correspondent Banks
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Received fixed rate (weighted average)	4.41%	4.34%
Pay variable rate (weighted average)	4.27%	3.74%
Estimated fair value	$ 10,534	$ 2,838

Derivative Financial Instrume68

Derivative Financial Instruments - Summary of Derivative Notional Amounts and Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Interest rate lock commitments
Derivative [Line Items]
Notional amount, derivative asset	$ 2,107	$ 4,795
Fair value, derivative asset	17	25
Notional amount, derivative liability	0	0
Fair value, derivative liability	0	0
Forward sale contracts related to mortgage banking | Short
Derivative [Line Items]
Notional amount, derivative asset	882	2,452
Fair value, derivative asset	1	8
Notional amount, derivative liability	1,225	2,343
Fair value, derivative liability	$ (5)	$ 5

Commitments and contingencies69

Commitments and contingencies (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Supply Commitment [Line Items]
Operating lease commitments	$ 69,304	$ 66,698
Loss contingencies for all legal claims	420	414
Interest rate lock commitments
Supply Commitment [Line Items]
Notional amount	2,107	4,795
Short | Forward sale commitments
Supply Commitment [Line Items]
Notional amount	2,107	4,795
Commitments to extend credit
Supply Commitment [Line Items]
Commitments and letters of credit	1,676,694	1,526,981
Standby letters of credit
Supply Commitment [Line Items]
Commitments and letters of credit	77,758	74,748
Other letters of credit
Supply Commitment [Line Items]
Commitments and letters of credit	125,630	74,147
Commitments to fund investments in affordable housing partnerships
Supply Commitment [Line Items]
Commitments and letters of credit	$ 38,056	$ 38,467

Goodwill, Intangible Assets, 70

Goodwill, Intangible Assets, and Servicing Assets - Intangible Assets (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 464,450,000		$ 464,450,000		$ 464,450,000
Goodwill impairment	0		0
Gross Carrying Amount	25,605,000		25,605,000
Accumulated Amortization	(10,313,000)		(10,313,000)
Carrying Amount	15,292,000		15,292,000
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization expense related to core deposit intangible assets	615,000	$ 676,000	$ 1,200,000	$ 1,400,000
Center Financial acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			7 years
Gross Carrying Amount	4,100,000		$ 4,100,000
Accumulated Amortization	(4,033,000)		(4,033,000)
Carrying Amount	67,000		$ 67,000
Pacific International Bank acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			7 years
Gross Carrying Amount	604,000		$ 604,000
Accumulated Amortization	(556,000)		(556,000)
Carrying Amount	48,000		$ 48,000
Foster Bankshares acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			10 years
Gross Carrying Amount	2,763,000		$ 2,763,000
Accumulated Amortization	(1,765,000)		(1,765,000)
Carrying Amount	998,000		$ 998,000
Wilshire Bancorp acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			10 years
Gross Carrying Amount	18,138,000		$ 18,138,000
Accumulated Amortization	(3,959,000)		(3,959,000)
Carrying Amount	$ 14,179,000		$ 14,179,000
Minimum | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			7 years
Maximum | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			10 years

Goodwill, Intangible Assets, 71

Goodwill, Intangible Assets, and Servicing Assets - Servicing Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	$ 24,866	$ 25,941	$ 24,710	$ 26,457	$ 26,457
Additions through originations of servicing assets	1,600	1,316	3,316	2,612
Amortization	(2,086)	(1,919)	(3,646)	(3,731)
Adjustments	670	0	670	0
Balance at end of period	25,050	$ 25,338	25,050	$ 25,338	24,710
Principal balances of loans serviced for other institutions	$ 1,540,000		$ 1,540,000		$ 1,510,000
SBA Servicing Assets: Weighted-average discount rate			12.09%		11.13%
SBA Servicing Assets: Constant prepayment rate			9.99%		8.38%
Mortgage Servicing Assets: Weighted-average discount rate			10.13%		9.63%
Mortgage Servicing Assets: Constant prepayment rate			7.65%		9.05%

Income Taxes Narrative (Details

Income Taxes Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax provision	$ 16,629,000	$ 25,451,000	$ 34,362,000	$ 48,450,000
Pretax income	$ 64,159,000	$ 66,138,000	$ 133,124,000	$ 125,347,000
Effective income tax rate	25.92%	38.48%	25.81%	38.65%
Income tax expense from Tax Act			$ 16,000		$ 25,400,000
Unrecognized tax benefits	$ 2,400,000		2,400,000		2,100,000
Interest accrued	438,000		438,000		348,000
Penalties accrued	0		0		$ 0
Decrease in unrecognized tax benefits is reasonably possible	$ 2,400,000		$ 2,400,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value, Recurring (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Costs to sell percentage	8.50%
Assets:
Securities available for sale, at fair value	$ 1,835,106	$ 1,720,257
Mortgage banking derivatives	18
Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	897,087	838,709
Residential
Assets:
Securities available for sale, at fair value	434,595	471,214
Commercial
Assets:
Securities available for sale, at fair value	420,271	301,365
Corporate securities
Assets:
Securities available for sale, at fair value	4,405	4,475
Municipal securities
Assets:
Securities available for sale, at fair value	78,748	82,537
Mutual funds
Assets:
Securities available for sale, at fair value		21,957
Recurring basis | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	897,087	838,709
Recurring basis | Residential
Assets:
Securities available for sale, at fair value	434,595	471,214
Recurring basis | Commercial
Assets:
Securities available for sale, at fair value	420,271	301,365
Recurring basis | Corporate securities
Assets:
Securities available for sale, at fair value	4,405	4,475
Recurring basis | Municipal securities
Assets:
Securities available for sale, at fair value	78,748	82,537
Recurring basis | Equity investments
Assets:
Equity investments with readily determinable fair value	25,475
Recurring basis | Mutual funds
Assets:
Securities available for sale, at fair value	0	21,957
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Interest rate swaps	0	0
Mortgage banking derivatives	0	0
Liabilities:
Interest rate swaps	0	0
Mortgage banking derivatives	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity investments
Assets:
Equity investments with readily determinable fair value	25,475
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual funds
Assets:
Securities available for sale, at fair value	0	21,957
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Interest rate swaps	(10,534)	(2,838)
Mortgage banking derivatives	18	33
Liabilities:
Interest rate swaps	(10,534)	(2,838)
Mortgage banking derivatives	5	5
Recurring basis | Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	897,087	838,709
Recurring basis | Significant Other Observable Inputs (Level 2) | Residential
Assets:
Securities available for sale, at fair value	434,595	471,214
Recurring basis | Significant Other Observable Inputs (Level 2) | Commercial
Assets:
Securities available for sale, at fair value	420,271	301,365
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate securities
Assets:
Securities available for sale, at fair value	4,405	4,475
Recurring basis | Significant Other Observable Inputs (Level 2) | Municipal securities
Assets:
Securities available for sale, at fair value	77,683	81,429
Recurring basis | Significant Other Observable Inputs (Level 2) | Equity investments
Assets:
Equity investments with readily determinable fair value	0
Recurring basis | Significant Other Observable Inputs (Level 2) | Mutual funds
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets:
Interest rate swaps	0	0
Mortgage banking derivatives	0	0
Liabilities:
Interest rate swaps	0	0
Mortgage banking derivatives	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Residential
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Commercial
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Municipal securities
Assets:
Securities available for sale, at fair value	1,065	1,108
Recurring basis | Significant Unobservable Inputs (Level 3) | Equity investments
Assets:
Equity investments with readily determinable fair value	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mutual funds
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Estimated Fair Value
Assets:
Interest rate swaps	(10,534)	(2,838)
Mortgage banking derivatives		33
Liabilities:
Interest rate swaps	(10,534)	(2,838)
Mortgage banking derivatives	$ 5	$ 5
Accounts Receivable | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	20.00%
Accounts Receivable | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	60.00%
Inventories | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	50.00%
Inventories | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	70.00%

Fair Value Measurements - Rollf

Fair Value Measurements - Rollforward of Level 3 Assets (Details) - Municipal securities - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 1,079	$ 1,128	$ 1,108	$ 1,139
Total losses included in other comprehensive income	(14)	(1)	(43)	(12)
Ending Balance	$ 1,065	$ 1,127	$ 1,065	$ 1,127

Fair Value Measurements - Ass75

Fair Value Measurements - Assets Measured at Fair Value, Non-Recurring (Details) - Non-recurring basis - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Real estate loans
Assets:
Assets	$ 13,660	$ 6,086
Commercial business
Assets:
Assets	8,011	3,320
Trade finance
Assets:
Assets	3,594
Consumer
Assets:
Assets	66	84
OREO
Assets:
Assets	3,741	5,615
Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial business
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Trade finance
Assets:
Assets	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | OREO
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Real estate loans
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Commercial business
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Trade finance
Assets:
Assets	0
Significant Other Observable Inputs (Level 2) | Consumer
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | OREO
Assets:
Assets	0	0
Significant Unobservable Inputs (Level 3) | Real estate loans
Assets:
Assets	13,660	6,086
Significant Unobservable Inputs (Level 3) | Commercial business
Assets:
Assets	8,011	3,320
Significant Unobservable Inputs (Level 3) | Trade finance
Assets:
Assets	3,594
Significant Unobservable Inputs (Level 3) | Consumer
Assets:
Assets	66	84
Significant Unobservable Inputs (Level 3) | OREO
Assets:
Assets	$ 3,741	$ 5,615

Fair Value Measurements - Total

Fair Value Measurements - Total Net Gains Losses on Assets Measured at Fair Value on a Non-Recurring Basis (Details) - Non-recurring basis - Change during period - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$ 966	$ (433)	$ (4,606)	$ (2,435)
Commercial business
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	1,513	(4,027)	614	(5,001)
Trade finance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	(240)	(527)	(225)	(1,239)
Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	448	(229)	(763)	(495)
Loans held for sale, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	0	353	0	772
OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$ 192	$ (733)	$ 264	$ (1,328)

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Carrying Amount
Financial Assets:
FHLB stock	$ 26,947	$ 29,776
Level 1 | Carrying Amount
Financial Assets:
Cash and cash equivalents	466,364	492,000
Financial Liabilities:
Convertible notes, net	192,120
Level 1 | Estimated Fair Value
Financial Assets:
Cash and cash equivalents	466,364	492,000
Financial Liabilities:
Convertible notes, net	214,429
Level 2/3 | Carrying Amount
Financial Assets:
Accrued interest receivable	30,954	29,979
Level 2/3 | Carrying Amount | Other investments
Financial Assets:
Interest bearing deposits in other financial institutions and other investments	77,817	53,366
Level 2/3 | Estimated Fair Value
Financial Assets:
Accrued interest receivable	30,954	29,979
Level 2/3 | Estimated Fair Value | Other investments
Financial Assets:
Interest bearing deposits in other financial institutions and other investments	77,748	52,960
Level 2 | Carrying Amount
Financial Assets:
Loans held for sale	26,866	29,661
Customers’ liabilities on acceptances	868	1,691
Financial Liabilities:
Noninterest bearing deposits	3,038,265	2,998,734
Saving and other interest bearing demand deposits	3,512,388	3,573,212
Time deposits	5,183,942	4,274,663
FHLB advances	836,994	1,157,693
Federal funds purchased		69,900
Subordinated debentures	101,386	100,853
Accrued interest payable	24,594	15,961
Acceptances outstanding	868	1,691
Level 2 | Estimated Fair Value
Financial Assets:
Loans held for sale	28,781	32,048
Customers’ liabilities on acceptances	868	1,691
Financial Liabilities:
Noninterest bearing deposits	3,038,265	2,998,734
Saving and other interest bearing demand deposits	3,512,388	3,573,212
Time deposits	5,200,868	4,263,585
FHLB advances	834,919	1,220,529
Federal funds purchased		69,900
Subordinated debentures	117,435	100,853
Accrued interest payable	24,594	15,961
Acceptances outstanding	868	1,691
Level 3 | Carrying Amount
Financial Assets:
Loans receivable—net	11,581,559	11,018,034
Servicing assets, net	25,050	24,710
Level 3 | Estimated Fair Value
Financial Assets:
Loans receivable—net	11,521,742	11,112,179
Servicing assets, net	$ 25,814	$ 27,511

Stockholders' Equity - Discussi

Stockholders' Equity - Discussion of Equity and Warrants (Details) - USD ($)	Jun. 07, 2018	May 20, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Apr. 26, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Total stockholders’ equity			$ 1,905,676,000	$ 1,906,294,000	$ 1,905,676,000	$ 1,906,294,000		$ 1,928,255,000	$ 1,855,473,000
Class of Warrant or Right [Line Items]
Equity component of convertible notes, net of taxes					$ 15,045,000
Share repurchase program, authorized amount							$ 100,000,000
Common stock repurchased and recorded as treasury stock (in shares)			4,400,000		4,400,000
Repurchase of treasury stock			$ 79,000,000		$ 78,961,000
Dividends paid (in dollars per share)			$ 0.13	$ 0.12	$ 0.26	$ 0.24
Convertible Notes
Class of Warrant or Right [Line Items]
Equity component of convertible notes			$ 21,900,000		$ 21,900,000
Issuance costs from convertible notes allocated to equity			461,000		461,000
Repurchase of treasury stock	$ 76,000,000
Additional paid-in capital
Equity [Abstract]
Total stockholders’ equity			1,421,679,000	$ 1,402,303,000	1,421,679,000	$ 1,402,303,000		$ 1,405,014,000	$ 1,400,490,000
Class of Warrant or Right [Line Items]
Equity component of convertible notes, net of taxes			21,400,000		$ 15,045,000
Convertible debt tax adjustment, reduction to additional paid-in capital			$ 6,400,000
Common Stock
Class of Warrant or Right [Line Items]
Potential repurchase (in shares)		350,767
Redemption of common stock warrant		$ 1,200,000
Maximum number of shares callable by warrants			20,673		20,673

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Accumulated Other Comprehensive (Loss) Income (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Equity [Abstract]
Balance at beginning of period	$ (38,640,000)	$ (12,849,000)	$ (21,781,000)	$ (14,657,000)
Unrealized loss on securities available for sale and interest only strips	(9,249,000)	4,776,000	(33,898,000)	7,908,000
Tax effect	2,767,000	(2,016,000)	10,276,000	(3,340,000)
Total other comprehensive (loss) income	(6,482,000)	2,760,000	(23,622,000)	4,568,000
Reclassification to retained earnings per ASU 2016-01			281,000	0
Balance at end of period	(45,122,000)	(10,089,000)	(45,122,000)	(10,089,000)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01					$ (188,000)
Reclassifications out of accumulated other comprehensive (loss) income	$ 0	$ 0	0	0
Accumulated other comprehensive loss, net
Equity [Abstract]
Total other comprehensive (loss) income			$ (23,622,000)	$ 4,568,000
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01					$ 281,000

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital	$ 1,470,620	$ 1,471,193
Common Equity Tier One Capital Ratio	11.74%	12.30%
Total capital (to risk-weighted assets), Amount
Total Capital, Actual	$ 1,658,771	$ 1,653,521
Total Capital, Required For Capital Adequacy Purposes	1,002,180	957,217
Required for Capital Adequacy with Capital Buffer	1,237,066	1,106,782
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	1,568,105	1,568,144
Tier I Capital, Required For Capital Adequacy Purposes	751,635	717,913
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	986,521	867,478
Tier I capital (to average assets), Amount
Tier I Capital, Actual (Leverage)	1,568,105	1,568,144
Tier I Capital, Required For Capital Adequacy Purposes	$ 567,163	$ 543,528
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total Capital (to Risk Weighted Assets), Actual	13.24%	13.82%
Total Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes	8.00%	8.00%
Total Capital (to Risk Weighted assets), Minimum Required for Capital Adequacy with Capital Buffer	9.875%	9.25%
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	12.52%	13.11%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	6.00%	6.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	7.875%	7.25%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)	11.06%	11.54%
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	4.00%	4.00%
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital	$ 1,727,710	$ 1,548,401
Common Equity Tier One Capital Ratio	13.79%	12.95%
Total capital (to risk-weighted assets), Amount
Total Capital, Actual	$ 1,818,376	$ 1,633,778
Total Capital, Required For Capital Adequacy Purposes	1,002,119	956,761
Required for Capital Adequacy with Capital Buffer	1,236,990	1,106,255
Required To Be Well Capitalized under Prompt Corrective Action Provisions	1,252,648	1,195,951
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	1,727,710	1,548,401
Tier I Capital, Required For Capital Adequacy Purposes	751,589	717,571
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	798,563	687,672
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	1,002,119	956,761
Tier I capital (to average assets), Amount
Tier I Capital, Actual (Leverage)	1,727,710	1,548,401
Tier I Capital, Required For Capital Adequacy Purposes	565,851	543,441
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	$ 707,314	$ 679,301
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total Capital (to Risk Weighted Assets), Actual	14.52%	13.66%
Total Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes	8.00%	8.00%
Total Capital (to Risk Weighted assets), Minimum Required for Capital Adequacy with Capital Buffer	9.875%	9.25%
Total Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	13.79%	12.95%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	6.00%	6.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	7.875%	7.25%
Common Equity Tier One Capital Required to be Well-Capitalized	$ 814,221	$ 777,368
Tier I Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	8.00%	8.00%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)	12.21%	11.40%
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	4.00%	4.00%
Tier I Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	5.00%	5.00%
Common Equity Tier 1 | Company
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Required For Capital Adequacy Purposes	$ 563,726	$ 538,435
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	$ 798,612	$ 688,000
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	4.50%	4.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	6.375%	5.75%
Common Equity Tier 1 | Bank
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Required For Capital Adequacy Purposes	$ 563,692	$ 538,178
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	$ 798,563	$ 687,672
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	4.50%	4.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	6.375%	5.75%
Tier I Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	6.50%	6.50%

Revenue Recognition - Service C

Revenue Recognition - Service Charged on Deposit Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 4,613	$ 5,179	$ 9,414	$ 10,517
Wire transfer fees	1,250	1,343	2,457	2,529
Wire transfer fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	1,149	1,229	2,229	2,330
Foreign exchange fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	101	114	228	199
Noninterest Bearing Deposits
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	4,598	5,163	9,385	10,484
Noninterest Bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	446	444	885	908
Noninterest Bearing Deposits | Customer analysis charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	2,036	2,164	4,060	4,344
Noninterest Bearing Deposits | NSF charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	1,895	2,320	3,986	4,734
Noninterest Bearing Deposits | Other service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	221	235	454	498
Interest-bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 15	$ 16	$ 29	$ 33

Revenue Recognition - OREO Inco

Revenue Recognition - OREO Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue from Contract with Customer [Abstract]
Gains (losses) on sales of OREO	$ 79	$ 86	$ 151	$ 82