Heidrick & Struggles International (HSII) 10-Q 26 Oct 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 23, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	HSII
Entity Registrant Name	HEIDRICK & STRUGGLES INTERNATIONAL INC
Entity Central Index Key	1,066,605
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		18,785,831

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 105,718,000	$ 165,011,000
Accounts receivable, net	129,640,000	93,191,000
Prepaid expenses	24,420,000	21,602,000
Other current assets	15,258,000	13,779,000
Income taxes recoverable	5,655,000	4,847,000
Total current assets	280,691,000	298,430,000
Non-current assets:
Property and equipment, net	41,945,000	35,099,000
Assets designated for retirement and pension plans	17,627,000	15,698,000
Investments	20,432,000	17,346,000
Other non-current assets	10,601,000	9,322,000
Goodwill	125,737,000	151,844,000
Other intangible assets, net	7,236,000	20,690,000
Deferred income taxes	49,158,000	33,073,000
Total non-current assets	272,736,000	283,072,000
Total assets	553,427,000	581,502,000
Current liabilities:
Accounts payable	8,294,000	7,952,000
Accrued salaries and employee benefits	127,670,000	155,523,000
Deferred revenue, net	35,339,000	28,367,000
Other current liabilities	21,503,000	24,133,000
Income taxes payable	5,256,000	4,617,000
Total current liabilities	198,062,000	220,592,000
Long-term Line of Credit		0
Employee-related Liabilities, Non-current	32,130,000	34,993,000
Non-current liabilities:
Retirement and pension plans	44,891,000	39,039,000
Other non-current liabilities	27,373,000	28,288,000
Total non-current liabilities	104,394,000	102,320,000
Total liabilities	302,456,000	322,912,000
Commitments and contingencies (Note 18)
Stockholders’ equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized, no shares issued at March 31, 2017 and December 31, 2016	0	0
Common stock, $0.01 par value, 100,000,000 shares authorized, 19,585,777 shares issued, 18,731,898 and 18,578,176 shares outstanding at March 31, 2017 and December 31, 2016, respectively	196,000	196,000
Treasury stock at cost, 853,879 and 1,007,601 shares at March 31, 2017 and December 31, 2016, respectively	(26,097,000)	(32,915,000)
Additional paid in capital	224,986,000	229,957,000
Retained earnings	40,927,000	58,030,000
Accumulated other comprehensive income	10,959,000	3,322,000
Total stockholders’ equity	250,971,000	258,590,000
Total liabilities and stockholders’ equity	$ 553,427,000	$ 581,502,000

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	19,585,777	19,585,777
Common stock, shares outstanding	18,781,433	18,578,176
Treasury stock, shares	804,344	1,007,601

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Revenue before reimbursements (net revenue)	$ 159,800	$ 143,519	$ 452,020	$ 422,569
Reimbursements	4,665	4,720	13,740	13,773
Total revenue	164,465	148,239	465,760	436,342
Operating expenses:
Salaries and employee benefits	108,546	95,355	309,159	288,015
General and administrative expenses	37,232	36,158	111,454	106,986
Goodwill and Intangible Asset Impairment	0	0	39,158	0
Reimbursed expenses	4,665	4,720	13,740	13,773
Total operating expenses	150,443	136,233	473,511	408,774
Operating income	14,022	12,006	(7,751)	27,568
Non-operating income (expense):
Interest, net	94	42	195	172
Other, net	147	340	(2,773)	418
Net non-operating income (expense)	241	382	(2,578)	590
Income before income taxes	14,263	12,388	(10,329)	28,158
Provision for income taxes	6,092	5,448	(902)	13,238
Net income	8,171	6,940	(9,427)	14,920
Other comprehensive income, net of tax:
Foreign currency translation adjustment	995	(717)	5,779	(1,173)
Net unrealized gain on available-for-sale investments	624	519	1,858	1,030
Other comprehensive income, net of tax	1,619	(198)	7,637	(143)
Comprehensive income	$ 9,790	$ 6,742	$ (1,790)	$ 14,777
Basic weighted average common shares outstanding (in shares)	18,781	18,577	18,720	18,528
Dilutive common shares (in shares)	235	273	0	273
Diluted weighted average common shares outstanding (in shares)	19,016	18,850	18,720	18,801
Basic net income per common share (in USD per share)	$ 0.44	$ 0.37	$ (0.50)	$ 0.81
Diluted net income per common share (in USD per share)	0.43	0.37	(0.50)	0.79
Cash dividends paid per share (in USD per share)	$ 0.13	$ 0.13	$ 0.39	$ 0.39

Condensed Consolidated Stateme5

Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning balance at Dec. 31, 2016	$ 258,590	$ 196	$ (32,915)	$ 229,957	$ 58,030	$ 3,322
Beginning balance, shares at Dec. 31, 2016	18,578,176	19,586,000	1,008,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ (9,427)				(9,427)
Other comprehensive income, net of tax	7,637					7,637
Treasury and common stock transactions:
Stock-based compensation	3,915			3,915
Vesting of equity, net of tax withholdings	(2,406)		$ (6,310)	(8,716)
Vesting of equity, net of tax withholdings, shares			188,000
Re-issuance of treasury stock	(338)		$ (508)	(170)
Re-issuance of treasury stock, shares			(15,000)
Cash dividends declared ($0.13 per share)	(7,320)				(7,320)
Dividend equivalents on restricted stock units	(356)				(356)
Ending balance at Sep. 30, 2017	$ 250,971	$ 196	$ (26,097)	$ 224,986	$ 40,927	$ 10,959
Ending balance, shares at Sep. 30, 2017	18,781,433	19,586,000	805,000

Condensed Consolidated Stateme6

Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parenthetical)	9 Months Ended
	Sep. 30, 2017$ / shares
Cash dividends per share	$ 0.39

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows—operating activities:
Net income	$ (9,427)	$ 14,920
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	11,270	11,676
Deferred income taxes	(15,340)	(1,731)
Stock-based compensation expense	3,915	5,055
Accretion expense related to earnout payments	(836)	(198)
Goodwill and Intangible Asset Impairment	39,158	0
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	32,603	33,267
Accounts payable	49	2,270
Accrued expenses	(38,043)	(47,130)
Deferred revenue	6,061	1,298
Income taxes payable, net	(44)	(76)
Retirement and pension plan assets and liabilities	2,798	3,009
Prepaid expenses	1,631	4,228
Other assets and liabilities, net	3,000	1,008
Net cash used in operating activities	(36,001)	(49,014)
Cash flows—investing activities:
Restricted cash	(3)	7,228
Payments to Acquire Businesses, Gross	(364)	(27,722)
Capital expenditures	(13,161)	(2,179)
Purchases of available for sale investments	(2,117)	(2,361)
Proceeds from sales of available for sale investments	1,271	510
Net cash used in investing activities	(14,374)	(24,524)
Proceeds from Lines of Credit	40,000	0
Repayments of Lines of Credit	(40,000)	0
Cash flows—financing activities:
Cash dividends paid	(7,676)	(7,442)
Payment of employee tax withholdings on equity transactions	(2,392)	(2,676)
Acquisition earnout payments	(4,557)	(7,461)
Net cash provided by (used in) financing activities	(14,625)	(17,579)
Effect of exchange rates fluctuations on cash and cash equivalents	5,707	640
Net decrease in cash and cash equivalents	(59,293)	(90,477)
Cash and cash equivalents at beginning of period	165,011	190,452
Cash and cash equivalents at end of period	$ 105,718	$ 99,975

Basis of Presentation of Interi

Basis of Presentation of Interim Financial Information	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation of Interim Financial Information	Basis of Presentation of Interim Financial Information The accompanying unaudited Condensed Consolidated Financial Statements of Heidrick & Struggles International, Inc. and subsidiaries (the “Company”) have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. Significant items subject to estimates and assumptions include revenue recognition, income taxes, interim effective tax rate and assessment of goodwill and other intangible assets for impairment. Estimates are subject to a degree of uncertainty and actual results could differ from these estimates. These financial statements and notes are to be read in conjunction with the Company’s Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 , as filed with the SEC on March 23, 2017 .

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies A complete listing of the Company’s significant accounting policies is discussed in Note 2, Summary of Significant Accounting Policies , in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 . Recently Issued Financial Accounting Standards In May 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2017-09, Compensation - Stock Compensation, Scope of Modification Accounting, which is intended to provide clarity and reduce both diversity in practice, cost and complexity when implementing a change in the terms or conditions of a share-based payment award. ASU 2017-09 requires that an entity should account for the effects of a modification unless the fair value, vesting conditions, and whether the award is classified as a liability instrument or an equity instrument remain unchanged in the modification. ASU 2017-09 is effective for interim and annual periods beginning after December 15, 2017 with early adoption permitted. The Company will adopt this guidance effective January 1, 2018. The impact of this accounting guidance will be dependent on future modification events including the number of awards modified. In March 2017, the FASB issued ASU No. 2017-07, Compensation - Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost, which is intended to improve the consistency, transparency and usefulness of net benefit cost disclosures. ASU 2017-07 requires that an employer report the service cost component of net benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. Additionally, the other components of net benefit costs are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. ASU 2017-07 is effective for interim and annual periods beginning after December 15, 2017 with early adoption permitted. The Company will adopt this guidance effective January 1, 2018. The impact of this accounting guidance will not be material to the Company's financial statements. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other, which eliminates Step 2 from the goodwill impairment test. Instead, under the amendments in this update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The Board also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. The Company early adopted ASU 2017-04, during the three months ended June 30, 2017. The Company concluded that ASU 2017-04 is preferable to the current guidance included in ASC 350 due to the simplified process of subsequently measuring goodwill. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows: Restricted Cash, which requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore amounts generally described as restricted cash should be included with cash and cash equivalents when reconciling the beginning of period and end of period total amounts shown on the statement of cash flows. The Company currently does not include restricted cash amounts in the beginning and ending cash amounts and will change the presentation of the cash flow statement to include restricted cash in the beginning and ending cash totals. The standard is effective for annual reporting periods beginning after December 15, 2017 with early adoption permitted.The Company will adopt this guidance effective January 1, 2018. If the Company had adopted the guidance as of September 30, 2017, the beginning and ending balance of cash, cash equivalents and restricted cash for the three months ended September 30, 2017 would have each increased by $0.6 million in the Condensed Consolidated Statement of Cash Flows. In August 2016, the Financial Accounting Standards Board ("FASB") issued accounting Standards Update ("ASU") No. 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments, which is intended to reduce diversity in practice as to how certain cash receipts and cash payments should be presented and classified. The standard is effective for interim and annual reporting periods beginning after December 15, 2017 with early adoption permitted. The Company has evaluated the standard and noted the guidance for contingent consideration payments made after a business combination are applicable to the Condensed Consolidated Statements of Cash Flows. The Company currently classifies all contingent consideration payments as financing activities. The impact of this change is not expected to be significant to the classification of these activities on the Consolidated Statement of Cash Flows. In February 2016, the FASB issued ASU No. 2016-02, Leases, intended to improve financial reporting about leasing transactions. The new guidance will require entities that lease assets to recognize on their balance sheets the assets and liabilities for the rights and obligations created by those leases and to disclose key information about the leasing arrangements. ASU 2016-02 is effective for interim and annual periods beginning after December 15, 2018 with early adoption permitted. The guidance requires lessees and lessors to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The Company is currently evaluating the impact of this accounting guidance. The effect is not known or reasonably estimable at this time. In January 2016, the FASB issued ASU 2016-01, Financial Instruments: Recognition and Measurement of Financial Assets and Financial Liabilities, which addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments including the recognition of unrealized changes in fair value within net income. The standard is effective for annual reporting periods beginning after December 15, 2017. The Company will adopt this guidance effective January 1, 2018 and is currently evaluating the impact of this accounting guidance. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The ASU requires that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for these goods or services. The guidance is effective for interim and annual reporting periods beginning after December 15, 2017. The guidance permits the use of either of the following transition methods: (i) a full retrospective method reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients or (ii) a retrospective method with the cumulative effect upon initial adoption recognized at the date of initial application (modified retrospective). The Company will adopt the guidance on January 1, 2018 and will apply the modified retrospective method, which involves recognizing the cumulative effect of applying the guidance at the date of initial application with no restatement of the comparative periods presented. The Company is performing its evaluation of ASU No. 2014-09. The Company is paid a retainer for its executive search services equal to approximately one-third of the estimated first year compensation for the position to be filled. If the actual compensation of a placed candidate exceeds the estimated compensation, the Company is often authorized to bill the client for one-third of the excess. The Company currently recognizes revenue associated with the difference between the estimated compensation and actual compensation at the time this amount is considered fixed and determinable. Under ASU 2014-09, the difference between estimated compensation and actual compensation is considered variable consideration. The Company will be required to estimate the amount of variable consideration for its executive search services at contract inception. The Company is still evaluating the financial impact of this change and if other changes will be required. The Company is continuing to evaluate the impacts of adoption of this guidance and its preliminary assessments are subject to change. Reclassifications Certain prior year amounts have been recast as a result of the change in the Company's operating segments as first reported in the Company's Annual Report on Form 10-K filed on March 23, 2017. The reclassifications had no impact on net income, net cash flows or stockholders' equity. Earnings per Common Share Basic earnings per common share is computed by dividing net income by weighted average common shares outstanding for the year. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted. Common equivalent shares are excluded from the determination of diluted earnings per share in periods in which they have an anti-dilutive effect. The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Net income (loss) $ 8,171 $ 6,940 $ (9,427 ) $ 14,920 Weighted average shares outstanding: Basic 18,781 18,577 18,720 18,528 Effect of dilutive securities: Restricted stock units 187 202 — 202 Performance stock units 48 71 — 71 Diluted 19,016 18,850 18,720 18,801 Basic earnings (loss) per share $ 0.44 $ 0.37 $ (0.50 ) $ 0.81 Diluted earnings (loss) per share $ 0.43 $ 0.37 $ (0.50 ) $ 0.79

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The activity of the allowance for doubtful accounts is as follows: Balance at December 31, 2016 $ 2,575 Provision charged to income 2,154 Write-offs (1,081 ) Foreign currency translation 95 Balance at September 30, 2017 $ 3,743

Property and Equipment, net

Property and Equipment, net	9 Months Ended
	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
Property and Equipment, net	Property and Equipment, net The components of the Company’s property and equipment are as follows: September 30, December 31, Leasehold improvements $ 48,007 $ 42,891 Office furniture, fixtures and equipment 17,638 16,677 Computer equipment and software 28,176 30,186 Property and equipment, gross 93,821 89,754 Accumulated depreciation (51,876 ) (54,655 ) Property and equipment, net $ 41,945 $ 35,099 Depreciation expense for the three months ended September 30, 2017 and 2016 was $2.8 million and $2.4 million , respectively. Depreciation expense for the nine months ended September 30, 2017 and 2016 was $7.4 million and $7.0 million , respectively.

Investments

Investments	9 Months Ended
	Sep. 30, 2017
Investments Schedule [Abstract]
Investments	Investments The Company has a U.S. non-qualified deferred compensation plan that consists primarily of U.S. marketable securities and mutual funds, all of which are valued using Level 1 inputs ( See Note 6, Fair Value Measurements ). The fair value for these investments was $20.4 million and $17.3 million as of September 30, 2017 and December 31, 2016 , respectively. The aggregate cost basis for these investments was $14.5 million and $13.3 million as of September 30, 2017 and December 31, 2016 , respectively.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A three-level fair value hierarchy prioritizes the inputs used to measure fair value. The hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: • Level 1 – Quoted prices in active markets for identical assets and liabilities. • Level 2 – Quoted prices in active markets for similar assets and liabilities, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets and liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs. The following tables provide a summary of the fair value measurements at September 30, 2017 and December 31, 2016 for each major category of assets and liabilities measured at fair value on a recurring basis: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Balance at September 30, 2017 U.S. non-qualified deferred compensation plan $ 20,432 $ — $ — $ 20,432 Assets designated for retirement and pension plans — 19,065 — 19,065 Pension benefit obligation — (24,878 ) — (24,878 ) Acquisition earnout accruals — — (6,980 ) (6,980 ) $ 20,432 $ (5,813 ) $ (6,980 ) $ 7,639 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Balance at December 31, 2016 U.S. non-qualified deferred compensation plan $ 17,346 $ — $ — $ 17,346 Assets designated for retirement and pension plans — 16,979 — 16,979 Pension benefit obligation — (22,128 ) — (22,128 ) Acquisition earnout accruals — — (10,991 ) (10,991 ) $ 17,346 $ (5,149 ) $ (10,991 ) $ 1,206 The Level 2 assets above are reinsurance contracts fair valued in accordance with BaFin - German Federal Financial Supervisory Authority guidelines, which utilize observable inputs including mortality tables and discount rates. The Level 3 liabilities include accruals for future earnout payments related to prior acquisitions, the values of which are determined based on discounted cash flow models. The Company considers the recorded value of its financial assets and liabilities, which consist primarily of cash and cash equivalents, accounts receivable, and accounts payable, to approximate the fair value of the respective assets and liabilities at September 30, 2017 and December 31, 2016 based upon the short-term nature of the assets and liabilities. The following table provides a reconciliation of the beginning and ending balance of Level 3 assets and liabilities for the nine months ended September 30, 2017 . Acquisition Balance at December 31, 2016 $ (10,991 ) Earnout accretion (836 ) Earnout payments 4,557 Philosophy IB earnout adjustment (Note 7) 705 Foreign currency translation (415 ) Balance at September 30, 2017 $ (6,980 )

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions On October 1, 2015 , the Company acquired Co Company, a UK-based management consulting firm that specializes in organizational development. The former owners of Co Company were eligible to receive additional cash consideration upon the realization of specific revenue and EBITDA Margin milestones achieved over the period October 2015 through December 2018. On August 25, 2016 , the Company and the former owners of Co Company entered into a Deed of Amendment (the "Amendment") to the Share Purchase Agreement dated October 1, 2015 . The Amendment adjusted the target fee revenue and targeted EBITDA margin for each remaining earn out period taking into consideration the unanticipated acquisitions completed subsequent to the Share Purchase Agreement. The new targets include subsequent acquisitions and took effect retrospectively from January 1, 2016 . On June 14, 2017 , the Company and the former owners of Co Company entered into an Earn Out Buyout Agreement (the “Buyout Agreement”) in accordance with the terms and conditions of the Share Purchase Agreement dated October 1, 2015 , as amended by a Deed of Amendment dated August 25, 2016 . Pursuant to the Buyout Agreement, in accordance with the Share Purchase Agreement and Deed of Amendment, the Company exercised its right to buy out all of the remaining earnout amounts. The price paid to buy out the Remaining Earn Out Amounts was calculated in accordance with the formula set forth in the Purchase Agreement and resulted in an aggregate buyout payment to the former owners of Co Company of $2.3 million during the three months ended June 30, 2017. On September 1, 2016 , the Company acquired substantially all of the assets of Philosophy IB, LLP ("Philosophy IB"), a New Jersey-based leadership, organization development and management consulting firm for $6.0 million , which was funded from existing cash. The former owners of Philosophy IB are eligible to receive an additional cash consideration based on two components: achieving revenue milestones generated from its software products from September 2016 through August 2019 and percentage of consulting revenue achieved over the period September 2016 to August 2019, subject to a profitability test. During the three months ended September 30, 2017, the Company determined that the software and consulting revenue targets for the period from September 2016 to August 2017, or first installment, would not be achieved. As such, the Company reduced the first installment earnout accrual by $0.7 million .

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill The Company's goodwill by segment is as follows: September 30, December 31, 2016 Executive Search Americas $ 88,712 $ 88,101 Europe 44,231 42,599 Asia Pacific 9,351 8,893 Total Executive Search 142,294 139,593 Leadership Consulting 6,950 6,534 Culture Shaping 29,317 29,224 Goodwill, gross 178,561 175,351 Accumulated impairment (52,824 ) (23,507 ) Goodwill, net $ 125,737 $ 151,844 Changes in the carrying amount of goodwill by segment for the nine months ended September 30, 2017 are as follows: Executive Search Leadership Consulting Culture Americas Europe Asia Pacific Total Gross goodwill at December 31, 2016 $ 88,101 $ 42,599 $ 8,893 $ 6,534 $ 29,224 $ 175,351 Accumulated impairment — (23,507 ) — — — (23,507 ) Net goodwill at December 31, 2016 88,101 19,092 8,893 6,534 29,224 151,844 Philosophy IB acquisition 357 — — 7 — 364 Foreign currency translation 254 1,632 458 409 93 2,846 Impairment — — — — (29,317 ) (29,317 ) Net goodwill at September 30, 2017 $ 88,712 $ 20,724 $ 9,351 $ 6,950 $ — $ 125,737 In 2017, the Culture Shaping business continued the transition of senior-level personnel which began in 2016, primarily due to planned retirements. The Company has experienced lower than expected consultant productivity during the transition period. Also, the marketplace for culture shaping services has become increasingly more competitive and the business experienced lengthening sales cycles and decision processes within target client organizations. These events led to a decline in the revenue performance of the business and uncertainty around the timing of improving such performance. As a result, the Company identified a triggering event and performed an interim impairment evaluation on the goodwill related to its Culture Shaping reporting unit during the three months ended June 30, 2017. During the impairment evaluation process, the Company used a discounted cash flow methodology to estimate the fair value of its Culture Shaping reporting unit. The discounted cash flow approach is dependent on a number of factors, including estimates of future market growth and trends, forecasted revenue and costs, capital investments, appropriate discount rates, certain assumptions to allocate shared costs, assets and liabilities, historical and projected performance of the reporting unit, and the macroeconomic conditions affecting each of the Company’s reporting units. The assumptions used in the determination of fair value were (1) a forecast of growth in the near and long term; (2) the discount rate; (3) working capital investments; and (4) other factors. The Company early adopted ASU No. 2017-04, Intangibles - Goodwill and Other in conjunction with its impairment evaluation during the three months ended June 30, 2017. Under the adopted guidance, Step 2 of the goodwill impairment test is eliminated. Instead, the goodwill impairment test is completed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge is recognized for the amount by which the carrying value of a the reporting unit exceeds its carrying amount, however, the loss recognized is not to exceed the total amount of goodwill allocated to that reporting unit. Based on the results of the of the impairment evaluation, the Company determined that the goodwill within the Culture Shaping reporting unit was impaired, which resulted in an impairment charge of $29.3 million to write-off all of the goodwill. The impairment charge is recorded within Impairment charges in the Condensed Consolidated Statement of Comprehensive Income (Loss) for the nine months ended September 30, 2017 . The impairment was non-cash in nature and did not affect our current liquidity, cash flows, borrowing capability or operations; nor did it impact the debt covenants under our credit agreement. The Company continues to monitor potential triggering events for its other reporting units including changes in the business climate in which it operates, the Company’s market capitalization compared to its book value, and the Company’s recent operating performance. Any changes in these factors could result in an impairment charge for the Company's reporting units. Other Intangible Assets, net The Company’s other intangible assets, net by segment, are as follows: September 30, December 31, 2016 Executive Search Americas $ 311 $ 501 Europe 2,011 2,937 Asia Pacific 113 127 Total Executive Search 2,435 3,565 Leadership Consulting 4,801 6,223 Culture Shaping — 10,902 Total other intangible assets, net $ 7,236 $ 20,690 As discussed above, the Culture Shaping business was impacted by the transition of senior-level personnel, primarily due to planned retirements, and the Company experienced lower than expected consultant productivity. The Company has also experienced lengthening sales cycles and decision processes within target client organizations. Due to the impact of these events on revenue and earnings when compared to actual and forecasted results, and the impact to the revenue and earnings inputs utilized in the fair value assessment of the intangible assets, the Company identified a triggering event for its Culture Shaping intangible assets and performed an impairment evaluation during the three months ended June 30, 2017. The analysis was conducted in accordance with accounting guidance on fair value measurements taking into consideration Level 3 inputs, primarily consisting of discounted cash flow and replacement cost methodologies. Based on this evaluation, the Company recorded an impairment charge related to its Culture Shaping client relationships, trade name, software and non-compete intangible assets of $9.9 million during the nine months ended September 30, 2017 . The impairment charge is recorded within Impairment charges in the Condensed Consolidated Statement of Comprehensive Income (Loss) for the nine months ended September 30, 2017 . The carrying amount of amortizable intangible assets and the related accumulated amortization are as follows: Weighted September 30, 2017 December 31, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Client relationships 8.2 $ 21,454 $ (14,800 ) $ 6,654 $ 33,299 $ (21,653 ) $ 11,646 Trade name 0.0 456 (456 ) — 9,436 (4,465 ) 4,971 Software 0.0 — — — 7,200 (4,114 ) 3,086 Non-compete 5.2 427 (169 ) 258 974 (423 ) 551 Technology 5.3 638 (314 ) 324 604 (168 ) 436 Total intangible assets 8.0 $ 22,975 $ (15,739 ) $ 7,236 $ 51,513 $ (30,823 ) $ 20,690 Intangible asset amortization expense for the three months ended September 30, 2017 and 2016 was $0.9 million and $1.6 million , respectively. Intangible asset amortization expense for the nine months ended September 30, 2017 and 2016 was $3.9 million and $4.7 million , respectively. The Company's estimated future amortization expense related to intangible assets as of September 30, 2017 for the years ended December 31st is as follows: Remainder of 2017 $ 824 2018 2,528 2019 1,526 2020 887 2021 614 Thereafter 857 Total $ 7,236

Other Non-Current Liabilities

Other Non-Current Liabilities	9 Months Ended
	Sep. 30, 2017
Other Liabilities Disclosure [Abstract]
Other Non-Current Liabilities	Other Non-Current Liabilities The components of other non-current liabilities are as follows: September 30, December 31, Premise related costs $ 18,735 $ 18,188 Accrued earnout payments 6,980 8,518 Other 1,658 1,582 Total other non-current liabilities $ 27,373 $ 28,288

Line of Credit

Line of Credit	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Line of Credit	Line of Credit On June 30, 2015 , the Company entered into a Second Amended and Restated Credit Agreement (the “Restated Credit Agreement”). The Restated Credit Agreement amended and restated the Credit Agreement executed on June 22, 2011 (the “Credit Agreement”). Pursuant to the Restated Credit Agreement, the Company replaced its Revolving Facility and Term Facility (“Existing Facility”) with a single senior unsecured revolving line of credit with an aggregate commitment of up to $100 million , which includes a sublimit of $25 million for letters of credit, and a $50 million expansion feature (the “Replacement Facility”). The Replacement Facility will mature on June 30, 2020 . Borrowings under the Restated Credit Agreement bear interest at the Company’s election at the existing Alternate Base Rate (as defined in the Credit Agreement) or Adjusted LIBOR Rate (as defined in the Credit Agreement) plus a spread as determined by the Company’s leverage ratio. Borrowings under the Replacement Facility may be used for working capital, capital expenditures, Permitted Acquisitions (as defined in the Credit Agreement) and for other general corporate purposes of the Company and its subsidiaries. The obligations under the Replacement Facility are guaranteed by certain of the Company’s subsidiaries. During the three months ended March 31, 2017, the Company borrowed $40.0 million under the Restated Credit Agreement and elected the Adjusted LIBOR Rate. The Company subsequently repaid $15.0 million during the three months ended March 31, 2017 and $25.0 million during the three months ended June 30, 2017. As of September 30, 2017 and December 31, 2016 , the Company had no outstanding borrowings under the Restated Credit Agreement and the Company was in compliance with the financial and other covenants under the Restated Credit Agreement and no event of default existed.

Stock-based Compensation

Stock-based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation	Stock-Based Compensation The Company’s 2012 Heidrick & Struggles GlobalShare Program (the “2012 Program”) provides for grants of stock options, stock appreciation rights, and other stock-based awards that are valued based upon the grant date fair value of shares. These awards may be granted to directors, selected employees and independent contractors. The 2012 Program originally authorized 1,300,000 shares of Common Stock for issuance pursuant to awards under the plan. On May 22, 2014 , the stockholders of the Company approved an amendment to the 2012 Program to increase the number of shares of Common Stock reserved for issuance under the 2012 Program by 700,000 shares. As of September 30, 2017 , 1,744,266 awards have been issued under the 2012 Program and 790,225 shares remain available for future awards, which includes 534,491 forfeited awards. The 2012 Program provides that no awards can be granted after May 24, 2022 . In September 2017, the Company entered into an agreement with its former Chief Executive Officer pursuant to which Mr. Wolstencroft voluntarily agreed, with the concurrence of the Board of Directors, to forfeit 100 percent of his 2017 restricted stock unit and performance stock unit grants. Mr. Wolstencroft remains eligible to continue vesting in 100 percent of his 2014 sign-on restricted stock unit grant, without proration, subject to his continued service on the board through the future scheduled vesting dates. With respect to his outstanding 2015 and 2016 restricted stock unit and performance stock unit grants, Mr. Wolstencroft remains eligible to earn an agreed upon pro-rata portion of the tranches scheduled to vest in 2017, 2018 and 2019, subject to his continued service as a director through the scheduled vesting dates (and with the performance goals for performance stock unit deemed to have been achieved at target level performance), and he agreed to forfeit the remaining portions of such 2015 and 2016 restricted stock unit and performance stock unit awards. The Company measures its stock-based compensation costs based on the grant date fair value of the awards and recognizes these costs in the financial statements over the requisite service period. A summary of information with respect to stock-based compensation is as follows: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Salaries and employee benefits $ 199 $ 1,155 $ 3,915 $ 4,492 General and administrative expenses — — 338 563 Income tax benefit related to stock-based compensation included in net income 79 437 1,561 2,005 Restricted Stock Units Restricted stock unit activity for the nine months ended September 30, 2017 : Number of Weighted- Outstanding on December 31, 2016 537,273 $ 20.97 Granted 243,306 24.18 Vested and converted to common stock (217,028 ) 21.39 Forfeited (68,255 ) 24.05 Outstanding on September 30, 2017 495,296 21.94 As of September 30, 2017 , there was $4.1 million of pre-tax unrecognized compensation expense related to unvested restricted stock units, which is expected to be recognized over a weighted average of 2.0 years . Performance Stock Units The Company grants performance stock units to certain of its senior executives. The performance stock units are generally subject to a cliff vesting at the end of a three year period. The vesting will vary between 0% — 200% based on the attainment of operating income goals over the three year vesting period. The performance stock units are expensed on a straight-line basis over the three year vesting period. Performance stock unit activity for the nine months ended September 30, 2017 : Number of Stock Units Weighted- Outstanding on December 31, 2016 236,812 $ 22.64 Granted 88,415 23.83 Vested and converted to common stock (70,652 ) 19.65 Forfeited (65,598 ) 24.06 Outstanding on September 30, 2017 188,977 23.83 As of September 30, 2017 , there was $1.4 million of pre-tax unrecognized compensation expense related to unvested performance stock units, which is expected to be recognized over a weighted average of 1.6 years .

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company reported income before taxes of $14.3 million and an income tax provision of $6.1 million for the three months ended September 30, 2017 . The Company reported income before taxes of $12.4 million and an income tax provision of $5.4 million for the three months ended September 30, 2016 . The effective tax rates for the three months ended September 30, 2017 and 2016 were 42.7% and 44.0% , respectively. The effective tax rate for the three months ended September 30, 2017 was impacted by losses that are not benefited for tax purposes and the mix of income. The effective tax rate for the three months ended September 30, 2016 was impacted by the mix of income. The Company reported a loss before taxes of $10.3 million and an income tax benefit of $0.9 million for the nine months ended September 30, 2017 . The Company reported income before taxes of $28.2 million and an income tax provision of $13.2 million for the nine months ended September 30, 2016 . The effective tax rates for the nine months ended September 30, 2017 and 2016 were 8.7% and 47.0% , respectively. The effective tax rate for the nine months ended September 30, 2017 was impacted by the non-deductibility of the employee benefit tax settlement (See Note 16, Commitments and Contingencies ), the deferred tax effect on the long-lived assets and goodwill impairment and the inability to recognize losses in certain jurisdictions. The effective tax rate for the nine months ended September 30, 2016 was impacted by the mix of income. The Company estimates that its effective tax rate for the year ended December 31, 2017 will be approximately 8% . The full year effective rate for 2017 is primarily the result of a loss before income taxes due to the goodwill impairment and losses that cannot be benefited for tax purposes.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income	Changes in Accumulated Other Comprehensive Income The changes in Accumulated other comprehensive income (“AOCI”) by component for the nine months ended September 30, 2017 is summarized below: Available- Foreign Pension AOCI Balance at December 31, 2016 $ 3,429 $ 2,290 $ (2,397 ) $ 3,322 Other comprehensive income before classification, net of tax 2,241 5,779 — 8,020 Amount reclassified from AOCI (1) (383 ) — — (383 ) Net current period other comprehensive income 1,858 5,779 — 7,637 Balance at September 30, 2017 $ 5,287 $ 8,069 $ (2,397 ) $ 10,959 (1) Available-for-Sale Securities reclassifications from AOCI are included in Other, net in the Condensed Consolidated Statement of Comprehensive Income (Loss).

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Information	Segment Information The Company operates its executive search business in the Americas; Europe (which includes Africa); and Asia Pacific (which includes the Middle East) and operates its leadership consulting and culture shaping businesses as separate segments. For segment purposes, reimbursements of out-of-pocket expenses classified as revenue and other operating income are reported separately and, therefore, are not included in the results of each segment. The Company believes that analyzing trends in revenue before reimbursements (net revenue), analyzing operating expenses as a percentage of net revenue, and analyzing operating income more appropriately reflects its core operations. The revenue and operating income (loss) by segment are as follows: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Revenue: Executive Search Americas $ 88,254 $ 75,602 $ 248,442 $ 230,486 Europe 33,994 27,844 90,534 78,783 Asia Pacific 21,865 22,813 64,162 63,427 Total Executive Search 144,113 126,259 403,138 372,696 Leadership Consulting 8,771 8,635 29,970 23,203 Culture Shaping 6,916 8,625 18,912 26,670 Revenue before reimbursements (net revenue) 159,800 143,519 452,020 422,569 Reimbursements 4,665 4,720 13,740 13,773 Total revenue $ 164,465 $ 148,239 $ 465,760 $ 436,342 Three Months Ended Nine Months Ended 2017 2016 2017 2016 Operating income (loss): Executive Search Americas $ 23,574 $ 19,208 $ 66,086 $ 58,583 Europe 4,131 2,530 5,947 6,926 Asia Pacific 1,213 2,223 5,319 4,830 Total Executive Search 28,918 23,961 77,352 70,339 Leadership Consulting (1,162 ) (1,009 ) (3,732 ) (5,914 ) Culture Shaping (1) 142 41 (42,355 ) (1,928 ) Total segment operating income (loss) 27,898 22,993 31,265 62,497 Global Operations Support (13,876 ) (10,987 ) (39,016 ) (34,929 ) Total operating income (loss) $ 14,022 $ 12,006 $ (7,751 ) $ 27,568 (1) Culture Shaping operating loss includes the impact of $39.2 million of impairment charges during the nine months ended September 30, 2017.

Guarantees

Guarantees	9 Months Ended
	Sep. 30, 2017
Guarantees [Abstract]
Guarantees	Guarantees The Company has issued cash collateralized bank guarantees and letter of credit backed bank guarantees supporting certain obligations, primarily the payment of office lease obligations and business license requirements for certain of its subsidiaries in Europe and Asia Pacific. The bank guarantees were made to secure the respective agreements and are for the terms of the agreements, which extend through 2019 . For each bank guarantee issued, the Company would have to perform under the guarantee if the subsidiary defaults on a lease payment. The maximum amount of undiscounted payments the Company would be required to make in the event of default on all outstanding guarantees is approximately $2.6 million as of September 30, 2017 . The Company has not accrued for these arrangements as no event of default exists or is expected to exist.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation The Company has contingent liabilities from various pending claims and litigation matters arising in the ordinary course of the Company’s business, some of which involve claims for damages that are substantial in amount. Some of these matters are covered by insurance. Based upon information currently available, the Company believes the ultimate resolution of such claims and litigation will not have a material adverse effect on its financial condition, results of operations or liquidity. UK Employee Benefits Trust On March 31, 2017, the Company reached a settlement with Her Majesty’s Revenue and Customs (“HMRC”) in the United Kingdom regarding HMRC’s challenge of the tax treatment of certain of the Company’s contributions in the United Kingdom to an Employee Benefits Trust between 2002 and 2008. HMRC alleged that the contributions should have been subject to Pay As You Earn tax and Class 1 National Insurance Contributions in the United Kingdom. In connection with the settlement, the Company agreed to pay approximately £5.4 million (equivalent to $6.8 million on the settlement date) related to Pay as You Earn tax, Class 1 National Insurance Contributions, inheritance tax and interest. Concurrently with the HMRC settlement, the Company also reached an agreement with the beneficiaries under the Employee Benefits Trust for the reimbursement of approximately £2.3 million (equivalent to $2.9 million on the settlement date) beneficiary-owed Pay as You Earn tax and Class 1 National Insurance Contributions. The Company has recorded $1.5 million related to the Pay as You Earn tax and Class 1 National Insurance Contributions and the respective beneficiary reimbursements as a component of Salaries and employee benefits in the Condensed Consolidated Statement of Comprehensive Income for the nine months ended September 30, 2017 . Inheritance tax and interest expense of $2.4 million incurred as a result of the settlement is recorded as a component of Other, net in the Condensed Consolidated Statement of Comprehensive Income for the nine months ended September 30, 2017 . During the three months ended June 30, 2017, the Company made payments of approximately £5.4 million (equivalent to $6.9 million on the payment date) related to the Pay as You Earn tax, and received reimbursement of £2.0 million (equivalent to $2.6 million on the reimbursement date) from the beneficiaries under the Employee Benefits Trust. Approximately £0.3 million (equivalent to $0.4 million at September 20, 2017) of reimbursements related to beneficiary-owed Pay as You Earn tax is outstanding at September 30, 2017.

Summary of Significant Accoun24

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Recent Financial Accounting Standards	Recently Issued Financial Accounting Standards In May 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2017-09, Compensation - Stock Compensation, Scope of Modification Accounting, which is intended to provide clarity and reduce both diversity in practice, cost and complexity when implementing a change in the terms or conditions of a share-based payment award. ASU 2017-09 requires that an entity should account for the effects of a modification unless the fair value, vesting conditions, and whether the award is classified as a liability instrument or an equity instrument remain unchanged in the modification. ASU 2017-09 is effective for interim and annual periods beginning after December 15, 2017 with early adoption permitted. The Company will adopt this guidance effective January 1, 2018. The impact of this accounting guidance will be dependent on future modification events including the number of awards modified. In March 2017, the FASB issued ASU No. 2017-07, Compensation - Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost, which is intended to improve the consistency, transparency and usefulness of net benefit cost disclosures. ASU 2017-07 requires that an employer report the service cost component of net benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. Additionally, the other components of net benefit costs are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. ASU 2017-07 is effective for interim and annual periods beginning after December 15, 2017 with early adoption permitted. The Company will adopt this guidance effective January 1, 2018. The impact of this accounting guidance will not be material to the Company's financial statements. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other, which eliminates Step 2 from the goodwill impairment test. Instead, under the amendments in this update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The Board also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. The Company early adopted ASU 2017-04, during the three months ended June 30, 2017. The Company concluded that ASU 2017-04 is preferable to the current guidance included in ASC 350 due to the simplified process of subsequently measuring goodwill. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows: Restricted Cash, which requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore amounts generally described as restricted cash should be included with cash and cash equivalents when reconciling the beginning of period and end of period total amounts shown on the statement of cash flows. The Company currently does not include restricted cash amounts in the beginning and ending cash amounts and will change the presentation of the cash flow statement to include restricted cash in the beginning and ending cash totals. The standard is effective for annual reporting periods beginning after December 15, 2017 with early adoption permitted.The Company will adopt this guidance effective January 1, 2018. If the Company had adopted the guidance as of September 30, 2017, the beginning and ending balance of cash, cash equivalents and restricted cash for the three months ended September 30, 2017 would have each increased by $0.6 million in the Condensed Consolidated Statement of Cash Flows. In August 2016, the Financial Accounting Standards Board ("FASB") issued accounting Standards Update ("ASU") No. 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments, which is intended to reduce diversity in practice as to how certain cash receipts and cash payments should be presented and classified. The standard is effective for interim and annual reporting periods beginning after December 15, 2017 with early adoption permitted. The Company has evaluated the standard and noted the guidance for contingent consideration payments made after a business combination are applicable to the Condensed Consolidated Statements of Cash Flows. The Company currently classifies all contingent consideration payments as financing activities. The impact of this change is not expected to be significant to the classification of these activities on the Consolidated Statement of Cash Flows. In February 2016, the FASB issued ASU No. 2016-02, Leases, intended to improve financial reporting about leasing transactions. The new guidance will require entities that lease assets to recognize on their balance sheets the assets and liabilities for the rights and obligations created by those leases and to disclose key information about the leasing arrangements. ASU 2016-02 is effective for interim and annual periods beginning after December 15, 2018 with early adoption permitted. The guidance requires lessees and lessors to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The Company is currently evaluating the impact of this accounting guidance. The effect is not known or reasonably estimable at this time. In January 2016, the FASB issued ASU 2016-01, Financial Instruments: Recognition and Measurement of Financial Assets and Financial Liabilities, which addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments including the recognition of unrealized changes in fair value within net income. The standard is effective for annual reporting periods beginning after December 15, 2017. The Company will adopt this guidance effective January 1, 2018 and is currently evaluating the impact of this accounting guidance. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The ASU requires that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for these goods or services. The guidance is effective for interim and annual reporting periods beginning after December 15, 2017. The guidance permits the use of either of the following transition methods: (i) a full retrospective method reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients or (ii) a retrospective method with the cumulative effect upon initial adoption recognized at the date of initial application (modified retrospective). The Company will adopt the guidance on January 1, 2018 and will apply the modified retrospective method, which involves recognizing the cumulative effect of applying the guidance at the date of initial application with no restatement of the comparative periods presented. The Company is performing its evaluation of ASU No. 2014-09. The Company is paid a retainer for its executive search services equal to approximately one-third of the estimated first year compensation for the position to be filled. If the actual compensation of a placed candidate exceeds the estimated compensation, the Company is often authorized to bill the client for one-third of the excess. The Company currently recognizes revenue associated with the difference between the estimated compensation and actual compensation at the time this amount is considered fixed and determinable. Under ASU 2014-09, the difference between estimated compensation and actual compensation is considered variable consideration. The Company will be required to estimate the amount of variable consideration for its executive search services at contract inception. The Company is still evaluating the financial impact of this change and if other changes will be required. The Company is continuing to evaluate the impacts of adoption of this guidance and its preliminary assessments are subject to change.
Reclassifications [Text Block]	Reclassifications Certain prior year amounts have been recast as a result of the change in the Company's operating segments as first reported in the Company's Annual Report on Form 10-K filed on March 23, 2017. The reclassifications had no impact on net income, net cash flows or stockholders' equity.
Earnings Per Share [Text Block]	Earnings per Common Share Basic earnings per common share is computed by dividing net income by weighted average common shares outstanding for the year. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted. Common equivalent shares are excluded from the determination of diluted earnings per share in periods in which they have an anti-dilutive effect. The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Net income (loss) $ 8,171 $ 6,940 $ (9,427 ) $ 14,920 Weighted average shares outstanding: Basic 18,781 18,577 18,720 18,528 Effect of dilutive securities: Restricted stock units 187 202 — 202 Performance stock units 48 71 — 71 Diluted 19,016 18,850 18,720 18,801 Basic earnings (loss) per share $ 0.44 $ 0.37 $ (0.50 ) $ 0.81 Diluted earnings (loss) per share $ 0.43 $ 0.37 $ (0.50 ) $ 0.79

Summary of Significant Accoun25

Summary of Significant Accounting Policies Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Net income (loss) $ 8,171 $ 6,940 $ (9,427 ) $ 14,920 Weighted average shares outstanding: Basic 18,781 18,577 18,720 18,528 Effect of dilutive securities: Restricted stock units 187 202 — 202 Performance stock units 48 71 — 71 Diluted 19,016 18,850 18,720 18,801 Basic earnings (loss) per share $ 0.44 $ 0.37 $ (0.50 ) $ 0.81 Diluted earnings (loss) per share $ 0.43 $ 0.37 $ (0.50 ) $ 0.79

Allowance for Doubtful Accoun26

Allowance for Doubtful Accounts (Tables) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Schedule of Allowance for Doubtful Accounts Receivable [Line Items]
Balance at September 30, 2015	$ 3,743
Schedule of Allowance for Doubtful Accounts Receivable [Table Text Block]	The activity of the allowance for doubtful accounts is as follows: Balance at December 31, 2016 $ 2,575 Provision charged to income 2,154 Write-offs (1,081 ) Foreign currency translation 95 Balance at September 30, 2017 $ 3,743

Property and Equipment, net (Ta

Property and Equipment, net (Tables)	9 Months Ended
	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
Components of Company's Property and Equipment	The components of the Company’s property and equipment are as follows: September 30, December 31, Leasehold improvements $ 48,007 $ 42,891 Office furniture, fixtures and equipment 17,638 16,677 Computer equipment and software 28,176 30,186 Property and equipment, gross 93,821 89,754 Accumulated depreciation (51,876 ) (54,655 ) Property and equipment, net $ 41,945 $ 35,099

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Levels of Inputs Used to Measure Fair Value of Assets	The following tables provide a summary of the fair value measurements at September 30, 2017 and December 31, 2016 for each major category of assets and liabilities measured at fair value on a recurring basis: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Balance at September 30, 2017 U.S. non-qualified deferred compensation plan $ 20,432 $ — $ — $ 20,432 Assets designated for retirement and pension plans — 19,065 — 19,065 Pension benefit obligation — (24,878 ) — (24,878 ) Acquisition earnout accruals — — (6,980 ) (6,980 ) $ 20,432 $ (5,813 ) $ (6,980 ) $ 7,639 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Balance at December 31, 2016 U.S. non-qualified deferred compensation plan $ 17,346 $ — $ — $ 17,346 Assets designated for retirement and pension plans — 16,979 — 16,979 Pension benefit obligation — (22,128 ) — (22,128 ) Acquisition earnout accruals — — (10,991 ) (10,991 ) $ 17,346 $ (5,149 ) $ (10,991 ) $ 1,206
Reconciliation of Beginning and Ending Balance of Level 3 Assets and Liabilities	The following table provides a reconciliation of the beginning and ending balance of Level 3 assets and liabilities for the nine months ended September 30, 2017 . Acquisition Balance at December 31, 2016 $ (10,991 ) Earnout accretion (836 ) Earnout payments 4,557 Philosophy IB earnout adjustment (Note 7) 705 Foreign currency translation (415 ) Balance at September 30, 2017 $ (6,980 )

Goodwill and Other Intangible29

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill by Segment [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	The Company's estimated future amortization expense related to intangible assets as of September 30, 2017 for the years ended December 31st is as follows: Remainder of 2017 $ 824 2018 2,528 2019 1,526 2020 887 2021 614 Thereafter 857 Total $ 7,236
Changes in Carrying Amount of Goodwill by Segment	hanges in the carrying amount of goodwill by segment for the nine months ended September 30, 2017 are as follows: Executive Search Leadership Consulting Culture Americas Europe Asia Pacific Total Gross goodwill at December 31, 2016 $ 88,101 $ 42,599 $ 8,893 $ 6,534 $ 29,224 $ 175,351 Accumulated impairment — (23,507 ) — — — (23,507 ) Net goodwill at December 31, 2016 88,101 19,092 8,893 6,534 29,224 151,844 Philosophy IB acquisition 357 — — 7 — 364 Foreign currency translation 254 1,632 458 409 93 2,846 Impairment — — — — (29,317 ) (29,317 ) Net goodwill at September 30, 2017 $ 88,712 $ 20,724 $ 9,351 $ 6,950 $ — $ 125,737
Summary of Other Intangible Assets Net by Segment	The Company’s other intangible assets, net by segment, are as follows: September 30, December 31, 2016 Executive Search Americas $ 311 $ 501 Europe 2,011 2,937 Asia Pacific 113 127 Total Executive Search 2,435 3,565 Leadership Consulting 4,801 6,223 Culture Shaping — 10,902 Total other intangible assets, net $ 7,236 $ 20,690
Carrying Amount of Amortizable Intangible Assets and Related Accumulated Amortization	The carrying amount of amortizable intangible assets and the related accumulated amortization are as follows: Weighted September 30, 2017 December 31, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Client relationships 8.2 $ 21,454 $ (14,800 ) $ 6,654 $ 33,299 $ (21,653 ) $ 11,646 Trade name 0.0 456 (456 ) — 9,436 (4,465 ) 4,971 Software 0.0 — — — 7,200 (4,114 ) 3,086 Non-compete 5.2 427 (169 ) 258 974 (423 ) 551 Technology 5.3 638 (314 ) 324 604 (168 ) 436 Total intangible assets 8.0 $ 22,975 $ (15,739 ) $ 7,236 $ 51,513 $ (30,823 ) $ 20,690

Goodwill and Other Intangible30

Goodwill and Other Intangible Assets Goodwill by Segment (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill by Segment [Line Items]
Goodwill by Segment [Table Text Block]	The Company's goodwill by segment is as follows: September 30, December 31, 2016 Executive Search Americas $ 88,712 $ 88,101 Europe 44,231 42,599 Asia Pacific 9,351 8,893 Total Executive Search 142,294 139,593 Leadership Consulting 6,950 6,534 Culture Shaping 29,317 29,224 Goodwill, gross 178,561 175,351 Accumulated impairment (52,824 ) (23,507 ) Goodwill, net $ 125,737 $ 151,844

Goodwill and Other Intangible31

Goodwill and Other Intangible Assets Goodwill, Carrying Amount (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss	hanges in the carrying amount of goodwill by segment for the nine months ended September 30, 2017 are as follows: Executive Search Leadership Consulting Culture Americas Europe Asia Pacific Total Gross goodwill at December 31, 2016 $ 88,101 $ 42,599 $ 8,893 $ 6,534 $ 29,224 $ 175,351 Accumulated impairment — (23,507 ) — — — (23,507 ) Net goodwill at December 31, 2016 88,101 19,092 8,893 6,534 29,224 151,844 Philosophy IB acquisition 357 — — 7 — 364 Foreign currency translation 254 1,632 458 409 93 2,846 Impairment — — — — (29,317 ) (29,317 ) Net goodwill at September 30, 2017 $ 88,712 $ 20,724 $ 9,351 $ 6,950 $ — $ 125,737

Other Non-Current Liabilities (

Other Non-Current Liabilities (Tables)	9 Months Ended
	Sep. 30, 2017
Other Liabilities Disclosure [Abstract]
Components of Other Non-Current Liabilities	The components of other non-current liabilities are as follows: September 30, December 31, Premise related costs $ 18,735 $ 18,188 Accrued earnout payments 6,980 8,518 Other 1,658 1,582 Total other non-current liabilities $ 27,373 $ 28,288

Stock-based Compensation (Table

Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Information with Respect to Stock-based Compensation	A summary of information with respect to stock-based compensation is as follows: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Salaries and employee benefits $ 199 $ 1,155 $ 3,915 $ 4,492 General and administrative expenses — — 338 563 Income tax benefit related to stock-based compensation included in net income 79 437 1,561 2,005
Restricted Stock Unit Activity	Restricted stock unit activity for the nine months ended September 30, 2017 : Number of Weighted- Outstanding on December 31, 2016 537,273 $ 20.97 Granted 243,306 24.18 Vested and converted to common stock (217,028 ) 21.39 Forfeited (68,255 ) 24.05 Outstanding on September 30, 2017 495,296 21.94
Performance Stock Unit Activity	Performance stock unit activity for the nine months ended September 30, 2017 : Number of Stock Units Weighted- Outstanding on December 31, 2016 236,812 $ 22.64 Granted 88,415 23.83 Vested and converted to common stock (70,652 ) 19.65 Forfeited (65,598 ) 24.06 Outstanding on September 30, 2017 188,977 23.83

Changes in Accumulated Other 34

Changes in Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income ("AOCI") by Component	The changes in Accumulated other comprehensive income (“AOCI”) by component for the nine months ended September 30, 2017 is summarized below: Available- Foreign Pension AOCI Balance at December 31, 2016 $ 3,429 $ 2,290 $ (2,397 ) $ 3,322 Other comprehensive income before classification, net of tax 2,241 5,779 — 8,020 Amount reclassified from AOCI (1) (383 ) — — (383 ) Net current period other comprehensive income 1,858 5,779 — 7,637 Balance at September 30, 2017 $ 5,287 $ 8,069 $ (2,397 ) $ 10,959 (1) Available-for-Sale Securities reclassifications from AOCI are included in Other, net in the Condensed Consolidated Statement of Comprehensive Income (Loss).

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue and Operating Income (Loss), by Segment	The revenue and operating income (loss) by segment are as follows: Three Months Ended Nine Months Ended 2017 2016 2017 2016 Revenue: Executive Search Americas $ 88,254 $ 75,602 $ 248,442 $ 230,486 Europe 33,994 27,844 90,534 78,783 Asia Pacific 21,865 22,813 64,162 63,427 Total Executive Search 144,113 126,259 403,138 372,696 Leadership Consulting 8,771 8,635 29,970 23,203 Culture Shaping 6,916 8,625 18,912 26,670 Revenue before reimbursements (net revenue) 159,800 143,519 452,020 422,569 Reimbursements 4,665 4,720 13,740 13,773 Total revenue $ 164,465 $ 148,239 $ 465,760 $ 436,342 Three Months Ended Nine Months Ended 2017 2016 2017 2016 Operating income (loss): Executive Search Americas $ 23,574 $ 19,208 $ 66,086 $ 58,583 Europe 4,131 2,530 5,947 6,926 Asia Pacific 1,213 2,223 5,319 4,830 Total Executive Search 28,918 23,961 77,352 70,339 Leadership Consulting (1,162 ) (1,009 ) (3,732 ) (5,914 ) Culture Shaping (1) 142 41 (42,355 ) (1,928 ) Total segment operating income (loss) 27,898 22,993 31,265 62,497 Global Operations Support (13,876 ) (10,987 ) (39,016 ) (34,929 ) Total operating income (loss) $ 14,022 $ 12,006 $ (7,751 ) $ 27,568 (1) Culture Shaping operating loss includes the impact of $39.2 million of impairment charges during the nine months ended September 30, 2017.

Summary of Significant Accoun36

Summary of Significant Accounting Policies Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent	$ 8,171	$ 6,940	$ (9,427)	$ 14,920
Weighted Average Number of Shares Outstanding, Basic	18,781	18,577	18,720	18,528
Weighted Average Number of Shares Outstanding, Diluted	19,016	18,850	18,720	18,801
Earnings Per Share, Basic	$ 0.44	$ 0.37	$ (0.50)	$ 0.81
Earnings Per Share, Diluted	$ 0.43	$ 0.37	$ (0.50)	$ 0.79
Performance Shares [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	48	71	0	71
Restricted Stock Units (RSUs) [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	187	202	0	202

Allowance for Doubtful Accoun37

Allowance for Doubtful Accounts - Summary of Allowance for Doubtful Accounts (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at December 31, 2014	$ 2,575
Provision charged to income	2,154
Write-offs	(1,081)
Currency	$ 95

Property and Equipment, Net - C

Property and Equipment, Net - Components of Company's Property and Equipment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation	$ 2,800	$ 2,400	$ 7,400	$ 7,000
Property and equipment, gross	93,821		93,821		$ 89,754
Accumulated depreciation	(51,876)		(51,876)		(54,655)
Property and equipment, net	41,945		41,945		35,099
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	48,007		48,007		42,891
Office Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	17,638		17,638		16,677
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 28,176		$ 28,176		$ 30,186

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 2.8	$ 2.4	$ 7.4	$ 7

Investments - Components of Com

Investments - Components of Company's Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Long-term investments	$ 20,432	$ 17,346
U.S. Non-Qualified Deferred Compensation Plan [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Available for sale securities	$ 20,432	$ 17,346

Investments - Additional Inform

Investments - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Long-term Investments	$ 20,432	$ 17,346
U.S. Non-Qualified Deferred Compensation Plan [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Aggregate cost basis for investments	14,500	13,300
Fair Value, Inputs, Level 1 [Member] | U.S. Non-Qualified Deferred Compensation Plan [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Long-term Investments	$ 20,400	$ 17,300

Fair Value Measurements - Level

Fair Value Measurements - Levels of Inputs Used to Measure Fair Value of Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value of assets	$ 7,639	$ 1,206
U.S. Non-Qualified Deferred Compensation Plan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	20,432	17,346
Assets Designated for Retirement and Pension Plans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets designated for retirement and pension plans	19,065	16,979
Pension Benefit Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Defined Benefit Plan, Benefit Obligation	(24,878)	(22,128)
Acquisition Earnout Accruals [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition earnout accruals	(6,980)	(10,991)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value of assets	20,432	17,346
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Non-Qualified Deferred Compensation Plan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	20,432	17,346
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value of assets	(5,813)	(5,149)
Significant Other Observable Inputs (Level 2) [Member] | Assets Designated for Retirement and Pension Plans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets designated for retirement and pension plans	19,065	16,979
Significant Other Observable Inputs (Level 2) [Member] | Pension Benefit Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Defined Benefit Plan, Benefit Obligation	(24,878)	(22,128)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value of assets	(6,980)	(10,991)
Significant Unobservable Inputs (Level 3) [Member] | Acquisition Earnout Accruals [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition earnout accruals	$ (6,980)	$ (10,991)

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation of Beginning and Ending Balance of Level 3 Assets and Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Fair Value, Asset and Liabilities Measured on Recurring and Nonrecurring Basis, Level 3 [Roll Forward]
Earnout payments	$ 4,557	$ 7,461
Fair Value, Inputs, Level 3 [Member] | Acquisition Earnout Accruals [Member]
Fair Value, Asset and Liabilities Measured on Recurring and Nonrecurring Basis, Level 3 [Roll Forward]
Beginning balance, acquisition earnout accruals	(10,991)
Earnout Accretion Fair Value Disclosure	(836)
Earnout Payments Fair Value Disclosure	4,557
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Business Combination, Acquisition Earnout Adjustment, Fair Value	705
Foreign currency translation	(415)
Ending balance, acquisition earnout accruals	$ (6,980)

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 01, 2016	Jun. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Acquisition earnout payments				$ (4,557)	$ (7,461)
Accretion Expense				836	$ 198
Goodwill				$ 125,737		$ 151,844
Philosophy IB [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 6,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Business Combination, Acquisition Earnout Adjustment, Fair Value			$ 700
Co Company [Member]
Business Acquisition [Line Items]
Acquisition earnout payments		$ (2,300)

Goodwill and Other Intangible45

Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill, Philosophy IB Acquisition	$ 364
Goodwill, Gross	178,561	$ 175,351
Goodwill, Impaired, Accumulated Impairment Loss	(52,824)	(23,507)
Goodwill [Roll Forward]
Gross goodwill at December 31, 2016	151,844
Foreign currency translation	2,846
Gross goodwill at March 31, 2017	125,737
Goodwill, Impairment Loss	(29,317)
Executive Search [Member]
Goodwill [Line Items]
Goodwill, Gross	142,294	139,593
Executive Search [Member] | Americas [Member]
Goodwill [Line Items]
Goodwill, Philosophy IB Acquisition	357
Goodwill, Gross	88,712	88,101
Goodwill, Impaired, Accumulated Impairment Loss		0
Goodwill [Roll Forward]
Foreign currency translation	254
Gross goodwill at March 31, 2017	88,712
Goodwill, Impairment Loss	0
Executive Search [Member] | Europe [Member]
Goodwill [Line Items]
Goodwill, Gross	44,231	42,599
Goodwill, Impaired, Accumulated Impairment Loss		(23,507)
Goodwill [Roll Forward]
Foreign currency translation	1,632
Gross goodwill at March 31, 2017	20,724
Goodwill, Impairment Loss	0
Executive Search [Member] | Asia Pacific [Member]
Goodwill [Line Items]
Goodwill, Gross	9,351	8,893
Goodwill, Impaired, Accumulated Impairment Loss		0
Goodwill [Roll Forward]
Foreign currency translation	458
Gross goodwill at March 31, 2017	9,351
Goodwill, Impairment Loss	0
Leadership Consulting [Member]
Goodwill [Line Items]
Goodwill, Philosophy IB Acquisition	7
Goodwill, Gross	6,950	6,534
Goodwill, Impaired, Accumulated Impairment Loss		0
Goodwill [Roll Forward]
Foreign currency translation	409
Gross goodwill at March 31, 2017	6,950
Goodwill, Impairment Loss	0
Culture Shaping [Member]
Goodwill [Line Items]
Goodwill, Gross	29,317	29,224
Goodwill, Impaired, Accumulated Impairment Loss		$ 0
Goodwill [Roll Forward]
Foreign currency translation	93
Gross goodwill at March 31, 2017	0
Goodwill, Impairment Loss	$ (29,317)

Goodwill and Other Intangible46

Goodwill and Other Intangible Assets - Summary of Other Intangible Assets Net by Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 7,236	$ 20,690
Executive Search [Member]
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	2,435	3,565
Executive Search [Member] | Americas [Member]
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	311	501
Executive Search [Member] | Europe [Member]
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	2,011	2,937
Executive Search [Member] | Asia Pacific [Member]
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	113	127
Culture Shaping [Member]
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	0	10,902
Leadership Consulting [Member]
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 4,801	$ 6,223

Goodwill and Other Intangible47

Goodwill and Other Intangible Assets - Carrying Amount of Amortizable Intangible Assets and Related Accumulated Amortization (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 900	$ 1,600	$ 3,900	$ 4,700
Weighted Average Life (in years)			8 years
Gross Carrying Amount	22,975		$ 22,975		$ 51,513
Accumulated Amortization	(15,739)		(15,739)		(30,823)
Net Carrying Amount	7,236		$ 7,236		20,690
Client Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)			8 years 2 months 12 days
Gross Carrying Amount	21,454		$ 21,454		33,299
Accumulated Amortization	(14,800)		(14,800)		(21,653)
Net Carrying Amount	6,654		$ 6,654		11,646
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)			1 day
Gross Carrying Amount	456		$ 456		9,436
Accumulated Amortization	(456)		(456)		(4,465)
Net Carrying Amount	0		$ 0		4,971
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)			1 day
Gross Carrying Amount	0		$ 0		7,200
Accumulated Amortization	0		0		(4,114)
Net Carrying Amount	0		$ 0		3,086
Non-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)			5 years 2 months 12 days
Gross Carrying Amount	427		$ 427		974
Accumulated Amortization	(169)		(169)		(423)
Net Carrying Amount	258		$ 258		551
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)			5 years 3 months 18 days
Gross Carrying Amount	638		$ 638		604
Accumulated Amortization	(314)		(314)		(168)
Net Carrying Amount	$ 324		$ 324		$ 436

Goodwill and Other Intangible48

Goodwill and Other Intangible Assets - Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense, excluding impairment charge	$ 900	$ 1,600	$ 3,900	$ 4,700
Estimated intangible asset amortization expense 2015	824		824
Estimated intangible asset amortization expense 2016	2,528		2,528
Estimated intangible asset amortization expense 2017	1,526		1,526
Estimated intangible asset amortization expense 2018	887		887
Estimated intangible asset amortization expense 2019	614		614
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	857		857
Finite-Lived Intangible Assets, Net	7,236		7,236		$ 20,690
Culture Shaping [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived			9,900
Finite-Lived Intangible Assets, Net	$ 0		$ 0		$ 10,902

Goodwill and Other Intangible49

Goodwill and Other Intangible Assets Goodwill by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill, Gross	$ 178,561	$ 175,351
Goodwill, Impaired, Accumulated Impairment Loss	(52,824)	(23,507)
Goodwill	125,737	151,844
Executive Search [Member]
Goodwill [Line Items]
Goodwill, Gross	142,294	139,593
Leadership Consulting [Member]
Goodwill [Line Items]
Goodwill, Gross	6,950	6,534
Goodwill, Impaired, Accumulated Impairment Loss		0
Goodwill	6,950
Culture Shaping [Member]
Goodwill [Line Items]
Goodwill, Gross	29,317	29,224
Goodwill, Impaired, Accumulated Impairment Loss		0
Goodwill	0
Americas [Member] | Executive Search [Member]
Goodwill [Line Items]
Goodwill, Gross	88,712	88,101
Goodwill, Impaired, Accumulated Impairment Loss		0
Goodwill	88,712
Europe [Member] | Executive Search [Member]
Goodwill [Line Items]
Goodwill, Gross	44,231	42,599
Goodwill, Impaired, Accumulated Impairment Loss		(23,507)
Goodwill	20,724
Asia Pacific [Member] | Executive Search [Member]
Goodwill [Line Items]
Goodwill, Gross	9,351	8,893
Goodwill, Impaired, Accumulated Impairment Loss		$ 0
Goodwill	$ 9,351

Other Non-Current Liabilities -

Other Non-Current Liabilities - Components of Other Non-Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Premise related costs	$ 18,735	$ 18,188
Accrued earnout payments	6,980	8,518
Other	1,658	1,582
Total other non-current liabilities	$ 27,373	$ 28,288

Line of Credit - Additional Inf

Line of Credit - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Jun. 30, 2015
Line of Credit Facility [Line Items]
Proceeds from Lines of Credit		$ 40,000,000	$ 40,000,000	$ 0
Long-term debt, gross					$ 0
Repayments of Long-term Debt	$ 25,000,000	$ 15,000,000
Senior Unsecured Revolving Line Of Credit Member [Member]
Line of Credit Facility [Line Items]
Senior unsecured revolving line of credit aggregate commitment						$ 100,000,000
Sublimit for letters of credit						25,000,000
Line of credit facility expansion feature						$ 50,000,000

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	May 22, 2014	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Document Period End Date				Sep. 30, 2017
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense		$ 79	$ 437	$ 1,561	$ 2,005
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax unrecognized compensation expense		4,100		$ 4,100
Expected time to be recognized				2 years
Performance Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax unrecognized compensation expense		$ 1,400		$ 1,400
Expected time to be recognized				1 year 7 months 6 days
Performance Stock Units [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units vesting period				3 years
Performance Stock Units [Member] | Minimum [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units, variation percentage				0.00%
Performance Stock Units [Member] | Maximum [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units, variation percentage				200.00%
2012 Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized or reserved for issuance with respect to awards granted		1,300,000		1,300,000
Increase in number of shares of common stock reserved for issuance	700,000
Number of stock awards issued under 2012 Program				1,744,266
Shares available for future awards		790,225		790,225
Number of forfeited awards under 2012 Program				534,491
Labor and Related Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost		$ 199	1,155	$ 3,915	4,492
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost		$ 0	$ 0	$ 338	$ 563

Stock-based Compensation - Summ

Stock-based Compensation - Summary of Information with Respect to Stock-Based Compensation (Detail) - USD ($) $ in Thousands	May 22, 2014	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit related to stock-based compensation included in net income		$ 79	$ 437	$ 1,561	$ 2,005
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Salaries and employee benefits		$ 0	$ 0	$ 338	$ 563
Two Thousand Twelve Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	700,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period				1,744,266
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		790,225		790,225
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares				534,491

Stock-based Compensation - Rest

Stock-based Compensation - Restricted Stock Unit Activity (Detail) - Restricted Stock Units [Member] $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $	$ 4.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of stock units, beginning balance | shares	537,273
Number of stock units, granted | shares	243,306
Number of stock units, vested and converted to common stock | shares	(217,028)
Number of stock units, forfeited | shares	(68,255)
Number of stock units, ending balance | shares	495,296
Weighted-average grant-date fair value, beginning balance | $ / shares	$ 20.97
Weighted-average grant-date fair value, granted | $ / shares	24.18
Weighted-average grant-date fair value, vested and converted to common stock | $ / shares	21.39
Weighted-average grant-date fair value, forfeited | $ / shares	24.05
Weighted-average grant-date fair value, ending balance | $ / shares	$ 21.94
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years

Stock-based Compensation - Perf

Stock-based Compensation - Performance Stock Unit Activity (Detail) - Performance Stock Units [Member] $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $	$ 1.4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of stock units, beginning balance | shares	236,812
Number of stock units, granted | shares	88,415
Number of stock units, vested and converted to common stock | shares	(70,652)
Number of stock units, forfeited | shares	(65,598)
Number of stock units, ending balance | shares	188,977
Weighted-average grant-date fair value, beginning balance | $ / shares	$ 22.64
Weighted-average grant-date fair value, granted | $ / shares	23.83
Weighted-average grant-date fair value, vested and converted to common stock | $ / shares	19.65
Weighted-average grant-date fair value, forfeited | $ / shares	24
Weighted-average grant-date fair value, ending balance | $ / shares	$ 23.83
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 7 months 6 days
Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Minimum [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0.00%
Maximum [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	200.00%

Stock-based Compensation CEO Aw

Stock-based Compensation CEO Awards Activity (Details)	3 Months Ended
	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
CEO Restricted Stock (2017 Grants), Forfeitures	100.00%
CEO Performance Stock (2017 Grants), Forfeitures	100.00%
CEO Restricted Stock (2014 Grants), Outstanding	100.00%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Results of Operations, Income before Income Taxes [Abstract]
Income before income taxes	$ 14,263	$ 12,388	$ (10,329)	$ 28,158
Provision for income taxes	$ 6,092	$ 5,448	$ (902)	$ 13,238
Effective Income Tax Rate Reconciliation, Percent	42.70%	44.00%	8.70%	47.00%
Forecasted Annual Effective Tax Rate			8.00%

Changes in Accumulated Other 58

Changes in Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income ("AOCI") by Component (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2016			$ 3,322
Other comprehensive income before classification, net of tax			8,020
Amount reclassified from AOCI			(383)
Net current period other comprehensive income	$ 1,619	$ (198)	7,637	$ (143)
Balance at March 31, 2017	10,959		10,959
Stockholders' equity attributable to parent	250,971		250,971		$ 258,590
Available-for-Sale Securities Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2016			3,429
Other comprehensive income before classification, net of tax			2,241
Amount reclassified from AOCI			(383)
Net current period other comprehensive income			1,858
Balance at March 31, 2017	5,287		5,287
Foreign Currency Translation Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2016			2,290
Other comprehensive income before classification, net of tax			5,779
Amount reclassified from AOCI			0
Net current period other comprehensive income			5,779
Balance at March 31, 2017	8,069		8,069
Pension Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2016			(2,397)
Other comprehensive income before classification, net of tax			0
Amount reclassified from AOCI			0
Net current period other comprehensive income			0
Balance at March 31, 2017	(2,397)		(2,397)
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net current period other comprehensive income			7,637
Stockholders' equity attributable to parent	$ 10,959		$ 10,959		$ 3,322

Segment Information - Revenue a

Segment Information - Revenue and Operating Income (Loss), by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
CEO Restricted Stock (2014 Grants), Outstanding	100.00%		100.00%
Goodwill and Intangible Asset Impairment	$ 0	$ 0	$ 39,158	$ 0
Revenue:
Revenue before reimbursements (net revenue)	159,800	143,519	452,020	422,569
Reimbursements	4,665	4,720	13,740	13,773
Total revenue	164,465	148,239	465,760	436,342
Operating income (loss):
Operating (loss) income	14,022	12,006	(7,751)	27,568
Operating Segments [Member]
Operating income (loss):
Operating (loss) income	27,898	22,993	31,265	62,497
Global Operations Support [Member]
Operating income (loss):
Operating (loss) income	(13,876)	(10,987)	(39,016)	(34,929)
Executive Search [Member] | Operating Segments [Member]
Revenue:
Revenue before reimbursements (net revenue)	144,113	126,259	403,138	372,696
Operating income (loss):
Operating (loss) income	28,918	23,961	77,352	70,339
Leadership Consulting [Member] | Operating Segments [Member]
Revenue:
Revenue before reimbursements (net revenue)	8,771	8,635	29,970	23,203
Operating income (loss):
Operating (loss) income	(1,162)	(1,009)	(3,732)	(5,914)
Culture Shaping [Member] | Operating Segments [Member]
Revenue:
Revenue before reimbursements (net revenue)	6,916	8,625	18,912	26,670
Operating income (loss):
Operating (loss) income	142	41	(42,355)	(1,928)
Executive Search and Leadership Consulting Americas Segment [Member] | Executive Search [Member] | Operating Segments [Member]
Revenue:
Revenue before reimbursements (net revenue)	88,254	75,602	248,442	230,486
Operating income (loss):
Operating (loss) income	23,574	19,208	66,086	58,583
Executive Search and Leadership Consulting Europe Segment [Member] | Executive Search [Member] | Operating Segments [Member]
Revenue:
Revenue before reimbursements (net revenue)	33,994	27,844	90,534	78,783
Operating income (loss):
Operating (loss) income	4,131	2,530	5,947	6,926
Executive Search and Leadership Consulting Asia Pacific Segment [Member] | Executive Search [Member] | Operating Segments [Member]
Revenue:
Revenue before reimbursements (net revenue)	21,865	22,813	64,162	63,427
Operating income (loss):
Operating (loss) income	$ 1,213	$ 2,223	$ 5,319	$ 4,830

Guarantees - Additional Informa

Guarantees - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)
Guarantees [Abstract]
Maximum undiscounted payments under outstanding guarantees	$ 2.6
Extend termination dates of the leases	extend through 2019

Guarantees Contingencies (Detai

Guarantees Contingencies (Details) £ in Millions, $ in Millions	Mar. 31, 2017USD ($)	Sep. 30, 2017GBP (£)
Loss Contingencies [Line Items]
Employee Benefit Tax Settlement, Gross Amount	$ 6.8	£ 5.4

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) £ in Millions, $ in Millions	Mar. 31, 2017USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2017GBP (£)	Sep. 30, 2017USD ($)	Sep. 30, 2017GBP (£)	Sep. 30, 2017GBP (£)
Loss Contingencies [Line Items]
Employee Benefit Tax Settlement, Gross Amount	$ 6.8				£ 5.4
Employee Benefit Tax Settlement, Payment		$ 6.9	£ 5.4
Employee Benefit Tax Settlement, Reimbursement Received		$ 2.6	£ 2
Employee Benefit Tax Settlement, Receivable				$ 0.4		£ 0.3
Employee Benefit Tax Settlement, Reimbursement Amount	$ 2.9				£ 2.3
Salaries and Employee Benefits [Member]
Loss Contingencies [Line Items]
Employee Benefit Tax Settlement, Gross Amount				1.5
Other, Net [Member]
Loss Contingencies [Line Items]
Employee Benefit Tax Settlement, Gross Amount				$ 2.4