ExlService (EXLS) 10-Q 29 Apr 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 25, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Trading Symbol	EXLS
Entity Registrant Name	ExlService Holdings, Inc.
Entity Central Index Key	1,297,989
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		33,472,670

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 95,774	$ 205,323
Short-term investments	97,079	13,676
Restricted cash	2,722	1,872
Accounts receivable, net	107,601	92,650
Prepaid expenses	8,426	8,027
Advance income tax, net	6,406	2,432
Other current assets	19,746	15,219
Total current assets	337,754	339,199
Fixed assets, net	47,540	47,991
Restricted cash	3,380	3,319
Deferred tax assets, net	9,711	13,749
Intangible assets, net	50,013	52,733
Goodwill	171,498	171,535
Other assets	22,384	22,257
Total assets	642,280	650,783
Current liabilities:
Accounts payable	3,146	6,401
Short-term borrowings	10,000	10,000
Deferred revenue	13,667	11,518
Accrued employee cost	24,644	44,526
Accrued expenses and other current liabilities	37,901	34,250
Current portion of capital lease obligations	286	384
Total current liabilities	89,644	107,079
Long term borrowings	55,000	60,000
Capital lease obligations, less current portion	278	278
Non-current liabilities	13,565	17,655
Total liabilities	158,487	$ 185,012
Commitments and contingencies
Preferred stock, $0.001 par value; 15,000,000 shares authorized, none issued	0	$ 0
ExlService Holdings, Inc. stockholders’ equity:
Common stock, $0.001 par value; 100,000,000 shares authorized, 35,252,413 shares issued and 33,409,249 shares outstanding as of March 31, 2016 and 34,781,201 shares issued and 33,091,223 shares outstanding as of December 31, 2015	35	35
Additional paid-in-capital	261,871	254,052
Retained earnings	334,809	320,989
Accumulated other comprehensive loss	(64,087)	(67,325)
Total including shares held in treasury	532,628	507,751
Less: 1,843,164 shares as of March 31, 2016 and 1,689,978 shares as of December 31, 2015, held in treasury, at cost	(49,014)	(42,159)
ExlService Holdings, Inc. stockholders' equity	483,614	465,592
Non-controlling interest	179	179
Total equity	483,793	465,771
Total liabilities and equity	$ 642,280	$ 650,783

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	15,000,000	15,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	35,252,413	34,781,201
Common stock, shares outstanding (in shares)	33,409,249	33,091,223
Treasury stock (in shares)	1,843,164	1,689,978

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues, net	$ 167,036	$ 143,510
Cost of revenues (exclusive of depreciation and amortization)	108,379	93,125
Gross profit	58,657	50,385
Operating expenses:
General and administrative expenses	20,618	18,621
Selling and marketing expenses	13,454	11,243
Depreciation and amortization	8,133	7,053
Total operating expenses	42,205	36,917
Income from operations	16,452	13,468
Other income/(expense) :
Foreign exchange gain	469	1,134
Other income, net	2,794	1,178
Income before income taxes	19,715	15,780
Income tax expense	5,895	6,213
Net income	$ 13,820	$ 9,567
Earnings per share:
Basic (in dollars per share)	$ 0.41	$ 0.29
Diluted (in dollars per share)	$ 0.40	$ 0.28
Weighted-average number of shares used in computing earnings per share:
Basic weighted average common shares outstanding (in shares)	33,380,028	33,236,259
Diluted weighted average common shares outstanding (in shares)	34,351,657	34,051,971

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 13,820	$ 9,567
Other comprehensive income/(loss):
Unrealized gain on effective cash flow hedges, net of taxes $403 and $453, respectively		2,034	1,806
Foreign currency translation adjustment		1,033	302
Retirement benefits, net of taxes $5 and $6, respectively		182	151
Reclassification adjustments
Realized (gain)/loss on cash flow hedges, net of taxes ($25) and $126, respectively	[1]	(32)	183
Retirement benefits, net of taxes $1 and $3, respectively	[2]	21	52
Total other comprehensive income		3,238	2,494
Total comprehensive income		$ 17,058	$ 12,061
[1]	These are reclassified to net income and are included in the foreign exchange gain/(loss) in the unaudited consolidated statements of income. See Note 7 to the consolidated financial statements.
[2]	These are reclassified to net income and are included in the computation of net periodic pension costs in the unaudited consolidated statements of income. See Note 11 to the consolidated financial statements.

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income/(Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Unrealized gain/(loss) on effective cash flow hedges, taxes	$ 403	$ 453
Retirement benefits, taxes	5	6
Realized loss on cash flow hedges, taxes	(25)	126
Retirement benefits, taxes	$ 1	$ 3

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 13,820	$ 9,567
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,133	7,053
Stock-based compensation expense	5,809	4,255
Unrealized gain on short term investments	(1,525)	(42)
Change in fair value of earn-out consideration	(250)	0
Unrealized foreign exchange (gain)/loss	(1,061)	284
Deferred income taxes	3,646	2,804
Others, net	(12)	29
Change in operating assets and liabilities (net of effect of acquisitions):
Restricted cash	(919)	(1,477)
Accounts receivable	(14,490)	(5,779)
Prepaid expenses and other current assets	(3,641)	(2,799)
Accounts payable	(2,584)	(984)
Deferred revenue	2,334	3,834
Accrued employee costs	(19,567)	(16,398)
Accrued expenses and other liabilities	4,147	(497)
Advance income tax, net	(4,429)	544
Other assets	148	(257)
Net cash (used for) / provided by operating activities	(10,441)	137
Cash flows from investing activities:
Purchase of fixed assets	(8,457)	(8,845)
Business acquisition (net of cash acquired)	0	(44,419)
Purchase of short-term investments	(101,327)	(5,995)
Proceeds from redemption of short-term investments	20,004	3,079
Net cash used for investing activities	(89,780)	(56,180)
Cash flows from financing activities:
Principal payments on capital lease obligations	(123)	(223)
Proceeds from borrowings	0	30,000
Repayments of borrowings	(5,000)	0
Payment of debt issuance costs	0	(50)
Acquisition of treasury stock	(6,855)	(397)
Proceeds from exercise of stock options	2,010	1,883
Net cash (used for)/provided by financing activities	(9,968)	31,213
Effect of exchange rate changes on cash and cash equivalents	640	(350)
Net decrease in cash and cash equivalents	(109,549)	(25,180)
Cash and cash equivalents, beginning of year	205,323	176,499
Cash and cash equivalents, end of year	$ 95,774	$ 151,319

Organization and Basis of Prese

Organization and Basis of Presentation	3 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation Organization ExlService Holdings, Inc. (“ExlService Holdings”) is organized as a corporation under the laws of the state of Delaware. ExlService Holdings, together with its subsidiaries (collectively, the “Company”), is a leading Operations Management and Analytics company that helps businesses enhance growth and profitability. Using its proprietary platforms, methodologies and tools the Company looks deeper to help companies improve global operations, enhance data-driven insights, increase customer satisfaction, and manage risk and compliance. The Company’s clients are located principally in the U.S. and the U.K. Basis of Presentation The unaudited interim consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“US GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by US GAAP for annual financial statements and therefore should be read in conjunction with the audited consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015. The unaudited interim consolidated financial statements reflect all adjustments (of a normal and recurring nature) that management considers necessary for a fair presentation of such statements for the interim periods presented. The unaudited consolidated statements of income for the interim periods presented are not necessarily indicative of the results for the full year or for any subsequent period. Effective for the quarter and year ended December 31, 2015, the Company merged two of its operating segments (Operations Consulting and Finance Transformation, previously part of the Analytics and Business Transformation reportable segment) into the Consulting operating segment to reflect recent organizational changes. The Company has also revised its reportable segments to reflect management’s focus on the Analytics operating segment. All other operating segments have been aggregated into the Operations Management reportable segment. The Company’s reportable segments are as follows: • Operations Management, and • Analytics. The segment information for all prior periods presented herein has been restated to conform to the current presentation. This change in segment presentation does not affect the Company’s consolidated statements of income, balance sheets or statements of cash flows.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies (a) Principles of Consolidation The accompanying unaudited consolidated financial statements include the financial statements of ExlService Holdings and all of its subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The non-controlling interest at March 31, 2016 represents the minority partner’s interest in the operations of ExlService Colombia S.A.S. ("Exl Colombia") and the profits associated with the minority partner’s interest in those operations, in the consolidated balance sheets and consolidated statements of income, respectively. The non-controlling interest in such operations for the three months ended March 31, 2016 was insignificant and is included under general and administrative expenses in the unaudited consolidated statements of income. (b) Use of Estimates The preparation of the unaudited consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the unaudited consolidated financial statements and the unaudited consolidated statements of income during the reporting period. Although these estimates are based on management’s best assessment of the current business environment, actual results may be different from those estimates. The significant estimates and assumptions that affect the financial statements include, but are not limited to, allowance for doubtful receivables, service tax receivables, assets and obligations related to employee benefit plans, deferred tax valuation allowances, income-tax uncertainties and other contingencies, valuation of derivative financial instruments, stock-based compensation expense, depreciation and amortization periods, purchase price allocation, recoverability of long-term assets including goodwill and intangibles, and estimates to complete the fixed price contracts. (c) Other current assets Other current assets consists of the following: March 31, 2016 December 31, 2015 Derivative instruments $ 3,831 $ 3,009 Advances to suppliers 1,534 1,545 Receivables from statutory authorities 9,372 8,676 Others 5,009 1,989 Other current assets $ 19,746 $ 15,219 (d) Accrued expenses and other current liabilities Accrued expenses and other current liabilities consists of the following: March 31, 2016 December 31, 2015 Accrued expenses $ 25,264 $ 26,238 Derivative instruments 413 1,226 Client liability account 2,972 2,217 Other current liabilities 9,252 4,569 Accrued expenses and other current liabilities $ 37,901 $ 34,250 (e) Non-current liabilities Non-current liabilities consists of the following: March 31, 2016 December 31, 2015 Derivative instruments $ 568 $ 1,132 Unrecognized tax benefits 3,112 3,066 Deferred rent 6,864 6,515 Retirement benefits 1,472 1,441 Other non-current liabilities 1,549 5,501 Non-current liabilities $ 13,565 $ 17,655 (f) Accumulated Other Comprehensive Loss For the Company, accumulated other comprehensive loss consists of amortization of actuarial gain/(loss) on retirement benefits and changes in the cumulative foreign currency translation adjustments. In addition, the Company enters into foreign currency exchange contracts, which are designated as cash flow hedges in accordance with ASC topic 815, "Derivatives and Hedging" ("ASC 815"). Changes in the fair values of contracts that are deemed effective are recorded as a component of accumulated other comprehensive loss until the settlement of those contracts. The balances as of March 31, 2016 and December 31, 2015 are as follows: December 31, 2015 December 31, 2015 Cumulative currency translation adjustments $ (67,030 ) $ (68,063 ) Unrealized gain on cash flow hedges, net of taxes of $1,035 and $657 2,826 824 Retirement benefits, net of taxes of ($194) and ($201) 117 (86 ) Accumulated other comprehensive loss $ (64,087 ) $ (67,325 ) (g) Other Income, net Other income, net consists of the following: Three months ended March 31, 2016 2015 Interest and dividend income* $ 2,222 $ 1,402 Interest expense (385 ) (283 ) Change in fair value of earn-out consideration** 250 — Other, net 707 59 Other income, net $ 2,794 $ 1,178 * Includes unrealized gain of $1,525 and $42 on investments carried under ASC topic 825, "Financial Instruments" ("ASC 825"), fair value option for the three months ended March 31, 2016 and 2015 respectively. ** Reduction in the Company's liability of earn-out consideration related to its acquisition of RPM Direct, LLC and RPM Data Solutions, LLC (the "RPM Acquisition") from $4,060 as of December 31, 2015 to $3,810 as of March 31, 2016 recognized as other income. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, “Revenue from Contracts with Customers”. The new standard is effective for reporting periods beginning after December 15, 2017 and early adoption is not permitted. The comprehensive new standard will supersede existing revenue recognition guidance and require revenue to be recognized when promised goods or services are transferred to customers in amounts that reflect the consideration to which the Company expects to be entitled in exchange for those goods or services. Adoption of the new rules could affect the timing of revenue recognition for certain transactions of the Company. ASU No. 2014-09 is effective for the Company in the first quarter of fiscal 2018 using either one of two methods: (i) retrospectively to each prior reporting period presented with the option to elect certain practical expedients as defined within ASU No. 2014-09; or (ii) retrospectively with the cumulative effect of initially applying ASU No. 2014-09 recognized at the date of initial application and providing certain additional disclosures as defined per ASU No. 2014-09. The Company is currently evaluating the impact of adoption and the implementation approach to be used. In January 2016, FASB issued ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities". This guidance makes targeted improvements to existing US GAAP for financial instruments, including requiring equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; requiring entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; requiring separate presentation of financial assets and financial liabilities by measurement category and form of financial asset and requiring entities to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option. The new guidance is effective for public companies for fiscal years beginning after December 15, 2017. Early adoption of the own credit provision is permitted. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). ASU No. 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve month term, these arrangements must now be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU No. 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. The balance sheet amount recorded for existing leases at the date of adoption of ASU No. 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. In addition, ASU No. 2016-02 requires the use of the modified retrospective method, which will require adjustment to all comparative periods presented in the consolidated financial statements. The new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements and the implementation approach to be used. In March 2016, FASB issued ASU No. 2016-05, Derivatives and Hedging: Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships, which clarifies that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not, in and of itself, require de-designation of that hedging relationship provided that all other hedge accounting criteria continue to be met. The new guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. An entity has the option to apply ASU No. 2016-05 on either a prospective basis or a modified retrospective basis. Early adoption is permitted. The adoption of ASU No. 2016-05 is not expected to have a material effect on the Company's consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-07, “Investments – Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting.” Among other things, the amendments in ASU No. 2016-07 eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. Early adoption is permitted. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). ASU No. 2016-08 clarifies the implementation guidance on principal versus agent considerations. The guidance includes indicators to assist an entity in determining whether it controls a specified good or service before it is transferred to the customers. The amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, Compensation – Stock Compensation (Topic 718). ASU No. 2016-09 identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement of cash flows. The amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted but all of the guidance must be adopted in the same period. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share is computed by dividing net income to common stockholders by the weighted average number of common shares outstanding during each period. Diluted earnings per share is computed using the weighted average number of common shares plus the potentially dilutive effect of common stock equivalents issued and outstanding at the reporting date, using the treasury stock method. Stock options, restricted stock and restricted stock units that are anti-dilutive are excluded from the computation of weighted average shares outstanding. The following table sets forth the computation of basic and diluted earnings per share: Three months ended March 31, 2016 2015 Numerators: Net income $ 13,820 $ 9,567 Denominators: Basic weighted average common shares outstanding 33,380,028 33,236,259 Dilutive effect of share based awards 971,629 815,712 Diluted weighted average common shares outstanding 34,351,657 34,051,971 Earnings per share: Basic $ 0.41 $ 0.29 Diluted $ 0.40 $ 0.28 Weighted average common shares considered anti-dilutive in computing diluted earnings per share 200,752 188,044

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Segment Information	Segment Information The Company's operating segments are significant strategic business units that align its products and services with how it manages its business, approach the key markets and interacts with its clients. Effective for the quarter and year ended December 31, 2015, the Company merged two of its operating segments (Operations Consulting and Finance Transformation, previously part of the Analytics and Business Transformation reportable segment) into the Consulting operating segment to reflect recent organizational changes. The Company has also revised its reportable segments to reflect management’s focus on the Analytics operating segment. All the other operating segments have been aggregated into the Operations Management reportable segment. The new reportable segments are as follows: • Operations Management • Analytics The Company has restated the segment information for the all prior periods presented herein to conform to the current presentation. This change in segment presentation does not affect the Company's consolidated statements of income, balance sheets or statements of cash flows. The chief operating decision maker (“CODM”) generally reviews operating segment revenues and cost of revenues. The Company does not allocate and therefore the CODM does not evaluate operating expenses, interest expense and income taxes by segment. The Company’s operating assets are shared by multiple segments. The Company manages assets on a total company basis, not by operating segment, and therefore asset information and capital expenditures by operating segment are not presented. Revenues and cost of revenues for the three months ended March 31, 2016 and 2015 for Operations Management and Analytics segments, respectively, are as follows: Three Months Ended Three Months Ended Operations Management Analytics Total Operations Management Analytics Total Revenues, net $ 128,070 $ 38,966 $ 167,036 $ 123,853 $ 19,657 $ 143,510 Cost of revenues (exclusive of depreciation and amortization) 83,608 24,771 108,379 79,729 13,396 93,125 Gross profit $ 44,462 $ 14,195 $ 58,657 $ 44,124 $ 6,261 $ 50,385 Operating expenses 42,205 36,917 Foreign exchange gain and other income, net 3,263 2,312 Income tax expense 5,895 6,213 Net income $ 13,820 $ 9,567

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill The following table sets forth details of the Company’s goodwill balance as of March 31, 2016 : Operations Management Analytics Total Balance at January 1, 2015 $ 122,814 $ 16,785 $ 139,599 Goodwill arising from RPM acquisition — 33,155 33,155 Currency translation adjustments (1,219 ) — (1,219 ) Balance at December 31, 2015 $ 121,595 $ 49,940 $ 171,535 Currency translation adjustments (37 ) — (37 ) Balance at March 31, 2016 $ 121,558 $ 49,940 $ 171,498 Intangible Assets Information regarding the Company’s intangible assets is set forth below: As of March 31, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships $ 64,815 $ (26,193 ) $ 38,622 Developed technology 12,234 (4,866 ) 7,368 Trade names and trademarks 5,670 (2,828 ) 2,842 Leasehold benefits 2,785 (2,157 ) 628 Non-compete agreements 2,045 (1,492 ) 553 $ 87,549 $ (37,536 ) $ 50,013 As of December 31, 2015 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships $ 64,816 $ (24,215 ) $ 40,601 Developed technology 12,234 (4,363 ) 7,871 Trade names and trademarks 5,670 (2,683 ) 2,987 Leasehold benefits 2,789 (2,109 ) 680 Non-compete agreements 2,045 (1,451 ) 594 $ 87,554 $ (34,821 ) $ 52,733 Amortization expense for the three months ended March 31, 2016 and 2015 was $2,715 and $2,059 , respectively. The remaining weighted average life of intangible assets was 6.2 years for customer relationships, 3.2 years for leasehold benefits, 4.5 years for developed technology, 3.3 years for non-compete agreements and 6.0 years for trade names and trademarks excluding indefinite life trade names and trademarks. The Company has $900 of indefinite lived trade names and trademarks as of March 31, 2016 and December 31, 2015 . Estimated amortization of intangible assets during the year ending March 31, 2017 $ 10,866 2018 $ 10,731 2019 $ 10,416 2020 $ 8,354 2021 $ 8,746

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Assets and Liabilities Measured at Fair Value The following table sets forth the Company’s assets and liabilities that were accounted for at fair value as of March 31, 2016 and December 31, 2015 . The table excludes accounts receivable, accounts payable and accrued expenses for which fair values approximate their carrying amounts. As of March 31, 2016 Level 1 Level 2 Level 3 Total Assets Money market and mutual funds* $ 102,686 $ — $ — $ 102,686 Derivative financial instruments — 5,003 — 5,003 Total $ 102,686 $ 5,003 $ — $ 107,689 Liabilities Derivative financial instruments $ — $ 981 $ — $ 981 Fair value of earn-out consideration — — 3,810 3,810 Total $ — $ 981 $ 3,810 $ 4,791 As of December 31, 2015 Level 1 Level 2 Level 3 Total Assets Money market and mutual funds $ 118,478 $ — $ — $ 118,478 Derivative financial instruments — 4,184 — 4,184 Total $ 118,478 $ 4,184 $ — $ 122,662 Liabilities Derivative financial instruments $ — $ 2,358 $ — $ 2,358 Fair value of earn-out consideration — — 4,060 4,060 Total $ — $ 2,358 $ 4,060 $ 6,418 * Includes short-term investments carried on fair value option under ASC 825 of $82,536 as of March 31, 2016. Derivative Financial Instruments: The Company’s derivative financial instruments consist of foreign currency forward exchange contracts. Fair values for derivative financial instruments are based on independent sources including highly rated financial institutions and are classified as Level 2. See Note 7 to our unaudited consolidated financial statements contained herein for further details on Derivatives and Hedge Accounting. Fair value of earn-out consideration: The fair value measurement of earn-out consideration is determined using Level 3 inputs. The Company’s earn-out consideration represents a component of the total purchase consideration for its March 2015 acquisition of RPM Direct, LLC and RPM Data Solutions, LLC (together "RPM"). The measurement is calculated using unobservable inputs based on the Company’s own assessment of achievement of certain performance goals by RPM during the 2015 and 2016 calendar years. As of March 31, 2016 and December 31, 2015, the Company estimated the fair value of the earn out consideration to be $3,810 and $4,060 , respectively, utilizing a Monte Carlo simulation. The Monte-Carlo simulation model simulates a range of possible performance levels and estimates the probabilities of the potential payouts. This model also incorporates a range of assumptions like discount rate, risk-free rate, assumed cost of debt, etc.

Derivatives and Hedge Accountin

Derivatives and Hedge Accounting	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedge Accounting	Derivatives and Hedge Accounting The Company uses derivative instruments and hedging transactions to mitigate exposure to foreign currency fluctuation risks associated with forecasted transactions denominated in certain foreign currencies and to minimize earnings and cash flow volatility associated with changes in foreign currency exchange rates. The Company’s derivative financial instruments are largely forward foreign exchange contracts that are designated effective and that qualify as cash flow hedges under ASC 815. The Company had outstanding cash flow hedges totaling $218,365 as of March 31, 2016 and $230,894 as of December 31, 2015. The fair value of these cash flow hedges is included in the other comprehensive loss on the Company's unaudited consolidated balance sheet. The Company also enters into foreign currency forward contracts to economically hedge its intercompany balances and other monetary assets and liabilities denominated in currencies other than functional currencies. These derivatives do not qualify as fair value hedges under ASC No. 815. Changes in the fair value of these derivatives are recognized in the consolidated statements of income and are included in foreign exchange gain/loss. The Company’s primary exchange rate exposure is with the Indian Rupee, the U.K. pound sterling and the Philippine peso. The Company also has exposure to Colombian pesos, Czech Koruna, Euro, South African ZAR and other local currencies in which it operates. Outstanding foreign currency forward contracts amounted to $59,290 and GBP 14,147 as of March 31, 2016 and amounted to $61,641 and GBP 13,256 as of December 31, 2015. The Company estimates that approximately $3,257 of net derivative gains included in accumulated other comprehensive loss (“AOCI”) could be reclassified into earnings within the next twelve months based on exchange rates prevailing as of March 31, 2016 . At March 31, 2016 , the maximum outstanding term of the cash flow hedges was forty-five months . The Company evaluates hedge effectiveness at the time a contract is entered into as well as on an ongoing basis. If during this time, a contract is deemed ineffective, the change in the fair value is recorded in the consolidated statements of income and is included in foreign exchange gain/(loss). For hedging positions that are discontinued because the forecasted transaction is not expected to occur by the end of the originally specified period, any related derivative amounts recorded in equity are reclassified to earnings. There were no such significant amounts of gains or losses that were reclassified from AOCI into earnings during the three months ended March 31, 2016 and 2015 . The following tables set forth the fair value of the foreign currency exchange contracts and their location on the unaudited consolidated financial statements: Derivatives designated as hedging instruments: March 31, 2016 December 31, 2015 Other current assets: Foreign currency exchange contracts $ 3,670 $ 2,664 Other assets: Foreign currency exchange contracts $ 1,172 $ 1,175 Accrued expenses and other current liabilities: Foreign currency exchange contracts $ 413 $ 1,226 Other non current liabilities: Foreign currency exchange contracts $ 568 $ 1,132 Derivatives not designated as hedging instruments: March 31, 2016 December 31, 2015 Other current assets: Foreign currency exchange contracts $ 161 $ 345 The following tables set forth the effect of foreign currency exchange contracts on the unaudited consolidated statements of income for the three months ended March 31, 2016 and 2015 : Derivatives in Cash Flow Hedging Relationships Amount of Gain/(Loss) Recognized in AOCI on Derivative (Effective Portion) Location of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion) Amount of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion) Location of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) 2016 2015 2016 2015 2016 2015 Foreign exchange contracts $ 2,437 $ 2,259 Foreign exchange gain/(loss) $ 57 $ (309 ) Foreign exchange gain/(loss) $ — $ — Derivatives not designated as Hedging Instruments Amount of Gain/(Loss) Recognized in Income on Derivatives Location of Gain or (Loss) Recognized in Income on Derivatives 2016 2015 Foreign exchange contracts Foreign exchange gain/(loss) $ 1,729 $ 2,096

Fixed Assets

Fixed Assets	3 Months Ended
	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Fixed Assets	Fixed Assets Fixed assets consist of the following: March 31, 2016 December 31, 2015 Owned Assets: Network equipment, computers and software $ 98,600 $ 95,245 Leasehold improvements 29,037 28,603 Office furniture and equipment 14,283 14,000 Capital work in progress 4,166 3,140 Buildings 1,200 1,202 Land 786 787 Motor vehicles 567 540 148,639 143,517 Less: Accumulated depreciation and amortization (101,583 ) (96,079 ) $ 47,056 $ 47,438 Assets under capital leases: Leasehold improvements $ 874 $ 877 Office furniture and equipment 134 136 Motor vehicles 813 806 1,821 1,819 Less: Accumulated depreciation and amortization (1,337 ) (1,266 ) $ 484 $ 553 Fixed assets, net $ 47,540 $ 47,991 Depreciation and amortization expense excluding amortization of acquisition-related intangibles for the three months ended March 31, 2016 and 2015 was $5,418 , and $4,994 , respectively. Capital work in progress represents advances paid towards acquisition of fixed assets and cost of fixed assets and internally generated software costs not yet ready to be placed in service.

Capital Structure

Capital Structure	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Capital Structure	Capital Structure Common Stock The Company has one class of common stock outstanding. During the three months ended March 31, 2016 and 2015 , the Company acquired 14,548 and 12,866 shares of common stock, respectively from employees in connection with withholding tax payments related to the vesting of restricted stock for a total consideration of $652 and $397 , respectively. The weighted average purchase price of $44.83 and $30.83 , respectively, was the average of the high and low price of a share of the Company’s common stock on the Nasdaq Global Select Market on the trading day prior to the vesting date of the shares of restricted stock. On December 30, 2014, the Company’s Board of Directors authorized up to an annual $20,000 common stock repurchase program (the “2014 Repurchase Program”), under which shares may be purchased by the Company from time to time from the open market and through private transactions during each of the fiscal years 2015 to 2017 . During the three months ended March 31, 2016 , the Company purchased 138,638 shares of its common stock for an aggregate purchase price of approximately $6,202 including commissions, representing an average purchase price per share of $44.74 under the 2014 Repurchase program. There were no such shares of common stock purchased during the three months ended March 31, 2015. Repurchased shares have been recorded as treasury shares and will be held until the Board of Directors designates that these shares be retired or used for other purposes.

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Borrowings	Borrowings On October 24, 2014, the Company entered into a credit agreement (as amended, the “Credit Agreement”) with certain lenders and JPMorgan Chase Bank, N.A., as Administrative Agent. The Credit Agreement provided for a $50,000 revolving credit facility (the “Credit Facility”), including a letter of credit sub-facility, for a period of five years. The Company had an option to increase the commitments under the Credit Facility by up to an additional $50,000 , subject to certain approvals and conditions as set forth in the Credit Agreement. On February 23, 2015, via an amendment to the Credit Agreement, the Company exercised its option to increase credit commitments by another $50,000 upon the same terms and conditions which were available in the Credit Agreement. The Credit Facility has a maturity date of October 24, 2019 and is voluntarily pre-payable from time to time without premium or penalty. The Company entered into a second amendment to the Credit Agreement effective as of September 28, 2015 to address a minor clarification to the definition of change of control. Borrowings under the Credit Facility may be used for working capital, general corporate purposes and for acquisitions. The Company has an outstanding debt of $65,000 and $70,000 as of March 31, 2016 and December 31, 2015, respectively, of which $10,000 is expected to be repaid within next twelve months and is included under “short-term borrowings” in the unaudited consolidated balance sheets. The Credit Facility carried an effective interest rate of 1.90% per annum and 1.56% per annum, respectively during the three months ended March 31, 2016 and 2015. In connection with the financing, the Company incurred certain debt issuance costs, which are deferred and amortized as an adjustment to interest expense over the term of the Credit Facility. The unamortized debt issuance costs as of March 31, 2016 and December 31, 2015 was $344 and $368 , respectively and is included under "other current assets" and "other assets" in the unaudited consolidated balance sheets. The obligations under the Credit Agreement are secured by all or substantially all of the assets of the Company and its material domestic subsidiaries. The Credit Agreement contains certain covenants including a restriction on indebtedness of the Company. As of March 31, 2016, the Company was in compliance with all covenants.

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company’s Gratuity Plans in India and the Philippines ("Gratuity Plan") provide for lump sum payment to vested employees on retirement or upon termination of employment in an amount based on the respective employee’s salary and years of employment with the Company. Liabilities with regard to the Gratuity Plans are determined by actuarial valuation using the projected unit credit method. Current service costs for the Gratuity Plan are accrued in the year to which they relate. Actuarial gains or losses or prior service costs, if any, resulting from amendments to the plans are recognized and amortized over the remaining period of service of the employees. Net gratuity cost includes the following components: Three months ended March 31, 2016 2015 Service cost $ 400 $ 423 Interest cost 149 142 Expected return on plan assets (104 ) (100 ) Actuarial loss 22 55 Net gratuity cost $ 467 $ 520 The Gratuity Plan in India is partially funded. The Company makes annual contributions to the employees' gratuity fund established with Life Insurance Corporation of India and HDFC Standard Life Insurance Company. They calculate the annual contribution required to be made by the Company and manage the Gratuity Plans, including any required payouts. Fund managers manage these funds on a cash accumulation basis and declare interest retrospectively on March 31 of each year. The Company earned a return of approximately 9.0% on these Gratuity Plans for the year ended March 31, 2016. Change in Plan Assets Plan assets at January 1, 2016 $ 4,923 Actual return 109 Benefits paid (253 ) Effect of exchange rate changes (10 ) Plan assets at March 31, 2016 $ 4,769 The Company maintains the Exl Service 401(k) Plan (the “401(k) Plan”) under Section 401(k) of the Internal Revenue Code of 1986 (the “Code”), covering all eligible employees, as defined. The Company may make discretionary contributions of up to a maximum of 3% of employee compensation within certain limits. The Company has made provisions for contributions to the 401(k) Plan amounting to $932 and $768 during the three months ended March 31, 2016 and 2015, respectively. During the three months ended March 31, 2016 and 2015 , the Company contributed $1,466 and $1,465 , respectively for various defined contribution plans on behalf of its employees in India, the Philippines, Romania, Bulgaria, Colombia and the Czech Republic.

Leases

Leases	3 Months Ended
	Mar. 31, 2016
Leases [Abstract]
Leases	Leases The Company finances its use of certain leasehold improvements, furniture, fixtures, office equipment and motor vehicles under various lease arrangements provided by financial institutions. Future minimum lease payments under these capital leases as of March 31, 2016 are as follows: Year ending March 31, 2017 $ 358 2018 168 2019 83 2020 41 Total minimum lease payments 650 Less: amount representing interest 86 Present value of minimum lease payments 564 Less: current portion 286 Long term capital lease obligation $ 278 The Company conducts its operations using facilities leased under non-cancelable operating lease agreements that expire at various dates. Future minimum lease payments under non-cancelable agreements expiring after March 31, 2016 are set forth below: Year ending March 31, 2017 $ 7,729 2018 5,642 2019 4,506 2020 3,303 2021 1,986 2022 and thereafter 1,101 $ 24,267 The operating leases are subject to renewal periodically and have scheduled rent increases. The Company recognizes rent on such leases on a straight line basis over the non-cancelable lease period determined under ASC topic 840, “Leases”. Rent expense under both cancelable and non-cancelable operating leases was $5,148 and $4,985 for the three months ended March 31, 2016 and 2015 , respectively. Deferred rent as of March 31, 2016 and December 31, 2015 was $7,419 and $7,066 , respectively, and is included under “Accrued expenses and other current liabilities” and “Non-current liabilities” in the consolidated balance sheets.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company determines the tax provision for interim periods using an estimate of its annual effective tax rate adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter, the Company updates its estimate of annual effective tax rate, and if its estimated tax rate changes, the Company makes a cumulative adjustment. The Company recorded income tax expense of $5,895 and $6,213 for the three months ended March 31, 2016 and 2015, respectively. The effective tax rate decreased from 39.4% during the three months ended March 31, 2015 to 29.9% during the three months ended March 31, 2016. The decrease was the result of a higher income tax expense during the three months ended March 31, 2015, primarily due to income tax expense of $1,818 related to immaterial errors for prior years. This decrease is partially offset by lower tax holiday benefits and an increase in the corporate tax rate applicable to certain foreign subsidiaries of the Company during the three months ended March 31, 2016 compared to the three months ended March 31, 2015. The following table summarizes the activity related to the gross unrecognized tax benefits from January 1, 2016 through March 31, 2016 : Balance as of January 1, 2016 $ 2,797 Increases related to prior year tax positions — Decreases related to prior year tax positions — Increases related to current year tax positions — Decreases related to current year tax positions — Effect of exchange rate changes (4 ) Balance as of March 31, 2016 $ 2,793 The unrecognized tax benefits as of March 31, 2016 of $2,793 , if recognized, would impact the effective tax rate. During the three months ended March 31, 2016 and 2015, the Company has recognized interest of $50 and $99 , respectively, which are included in the income tax expense in the unaudited consolidated statements of income. As of March 31, 2016 and December 31, 2015, the Company has accrued approximately $1,319 and $1,269 , respectively in interest relating to unrecognized tax benefits.

Stock Based Compensation

Stock Based Compensation	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock Based Compensation The following costs related to the Company’s stock-based compensation plan are included in the unaudited consolidated statements of income: Three months ended March 31, 2016 2015 Cost of revenue $ 1,265 $ 1,103 General and administrative expenses 2,372 1,483 Selling and marketing expenses 2,172 1,669 Total $ 5,809 $ 4,255 As of March 31, 2016 , the Company had 1,968,977 shares available for grant under the 2015 Amendment and Restatement of the 2006 Omnibus Award Plan. Stock Options Stock option activity under the Company’s stock plans is shown below: Number of Weighted- Aggregate Weighted- Outstanding at December 31, 2015 1,210,141 $ 16.31 34,638 3.50 Granted — — Exercised (163,788 ) 12.27 Forfeited — — Outstanding at March 31, 2016 1,046,353 $ 16.94 36,477 3.68 Vested and exercisable at March 31, 2016 1,046,353 $ 16.94 36,477 3.68 The unrecognized compensation cost for unvested options as of March 31, 2016 is nil . The Company did not grant any options during the three months ended March 31, 2016 and 2015. The total grant date fair value of options vested during the three months ended March 31, 2016 and 2015 was $706 and $1,126 , respectively. Restricted Stock and Restricted Stock Units Restricted stock and restricted stock unit activity under the Company’s stock plans is shown below: Restricted Stock Restricted Stock Units Number Weighted- Average Intrinsic Value Number Weighted- Average Intrinsic Value Outstanding at December 31, 2015* 129,638 $ 35.53 1,228,287 $ 30.06 Granted — — 377,294 48.54 Vested (12,212 ) 35.91 (300,821 ) 28.31 Forfeited — — (28,344 ) 27.61 Outstanding at March 31, 2016* 117,426 $ 35.49 1,276,416 $ 35.98 * As of March 31, 2016 and December 31, 2015 restricted stock units vested for which the underlying common stock is yet to be issued are 154,973 and 149,364 , respectively. As of March 31, 2016 , unrecognized compensation cost of $43,496 is expected to be expensed over a weighted average period of 3.01 years. Performance Based Stock Awards Performance restricted stock unit (the "PRSU's") activity under the Company’s stock plans is shown below: Revenue Based PRSUs Market Condition Based PRSUs Number Weighted Avg Fair Value Number Weighted Avg Fair Value Outstanding at December 31, 2015 107,213 $ 30.88 207,212 $ 38.80 Granted 59,861 48.57 59,859 67.94 Vested — — — — Forfeited (3,750 ) 34.75 (3,750 ) 54.63 Outstanding at March 31, 2016 163,324 $ 37.28 263,321 $ 45.20 As of March 31, 2016 , unrecognized compensation cost of $13,326 is expected to be expensed over a weighted average period of 2.18 years.

Geographical Information

Geographical Information	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Geographical Information	Geographical Information The Company attributes the revenues to regions based upon location of its customers. Three months ended March 31, 2016 2015 Revenues, net United States $ 134,074 $ 111,865 United Kingdom 27,428 25,835 Rest of World 5,534 5,810 $ 167,036 $ 143,510 March 31, 2016 December 31, 2015 Fixed assets, net India $ 23,511 $ 23,415 United States 9,806 10,680 Philippines 11,461 11,285 Rest of World 2,762 2,611 $ 47,540 $ 47,991

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Fixed Asset Commitments At March 31, 2016 , the Company has committed to spend approximately $6,510 under agreements to purchase fixed assets. This amount is net of capital advances paid in respect of these purchases. Other Commitments Certain units of the Company’s Indian subsidiaries were established as 100% Export-Oriented units or under the Software Technology Parks of India (“STPI”) scheme promulgated by the Government of India. These units are exempt from customs, central excise duties, and levies on imported and indigenous capital goods, stores, and spares. The Company has undertaken to pay custom duties, service taxes, levies, and liquidated damages payable, if any, in respect of imported and indigenous capital goods, stores and spares consumed duty free, in the event that certain terms and conditions are not fulfilled. The Company’s management believes, however, that these units have in the past satisfied and will continue to satisfy the required conditions. The Company’s operations centers in the Philippines are registered with the Philippine Economic Zone Authority (“PEZA”). The registration provides the Company with certain fiscal incentives on the import of capital goods and requires ExlService Philippines, Inc. to meet certain performance and investment criteria. The Company’s management believes that these centers have in the past satisfied and will continue to satisfy the required criteria. Contingencies U.S. and Indian transfer pricing regulations require that any international transaction involving associated enterprises be at an arm’s-length price. Accordingly, the Company determines the appropriate pricing for the international transactions among its associated enterprises on the basis of a detailed functional and economic analysis involving benchmarking against transactions among entities that are not under common control. The tax authorities have jurisdiction to review this arrangement and in the event that they determine that the transfer price applied was not appropriate, the Company may incur increased tax liability, including accrued interest and penalties. The Company is currently involved in disputes with the Indian tax authorities over the application of some of its transfer pricing policies for some of its subsidiaries. Further, the Company and a U.S. subsidiary are engaged in tax litigation with the income-tax authorities in India on the issue of permanent establishment. The aggregate disputed amount demanded by Indian tax authorities from the Company related to its transfer pricing issues for years ranging from tax years 2003 to 2013 and its permanent establishment issues ranging from tax years 2003 to 2007 as of March 31, 2016 and December 31, 2015 is $20,835 and $21,360 , respectively, of which the Company has made payments or provided bank guarantee to the extent $14,342 and $14,668 , respectively. Amounts paid as deposits in respect of such assessments aggregating to $12,342 and $12,665 as of March 31, 2016 and December 31, 2015 , respectively, are included in “Other assets” and amounts deposited for bank guarantees aggregating to $2,000 and $2,003 as of March 31, 2016 and December 31, 2015 , respectively, are included in “Restricted cash” in the non-current assets section of the Company’s consolidated balance sheets as of March 31, 2016 and December 31, 2015 . Based on advice from its Indian tax advisors, the facts underlying the Company’s position and its experience with these types of assessments, the Company believes that the probability that it will ultimately be found liable for these assessments is remote and accordingly has not accrued any amount with respect to these matters in its consolidated financial statements. The Company does not expect any impact from these assessments on its future income tax expense. It is possible that the Company might receive similar orders or assessments from tax authorities for subsequent years. Accordingly even if these disputes are resolved, the Indian tax authorities may still serve additional orders or assessments.

Summary of Significant Accoun24

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Basis of Preparation	The unaudited interim consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“US GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by US GAAP for annual financial statements and therefore should be read in conjunction with the audited consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015. The unaudited interim consolidated financial statements reflect all adjustments (of a normal and recurring nature) that management considers necessary for a fair presentation of such statements for the interim periods presented. The unaudited consolidated statements of income for the interim periods presented are not necessarily indicative of the results for the full year or for any subsequent period.
Principles of Consolidation	The accompanying unaudited consolidated financial statements include the financial statements of ExlService Holdings and all of its subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	The preparation of the unaudited consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the unaudited consolidated financial statements and the unaudited consolidated statements of income during the reporting period. Although these estimates are based on management’s best assessment of the current business environment, actual results may be different from those estimates. The significant estimates and assumptions that affect the financial statements include, but are not limited to, allowance for doubtful receivables, service tax receivables, assets and obligations related to employee benefit plans, deferred tax valuation allowances, income-tax uncertainties and other contingencies, valuation of derivative financial instruments, stock-based compensation expense, depreciation and amortization periods, purchase price allocation, recoverability of long-term assets including goodwill and intangibles, and estimates to complete the fixed price contracts.
Recent Accounting Pronouncements	In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, “Revenue from Contracts with Customers”. The new standard is effective for reporting periods beginning after December 15, 2017 and early adoption is not permitted. The comprehensive new standard will supersede existing revenue recognition guidance and require revenue to be recognized when promised goods or services are transferred to customers in amounts that reflect the consideration to which the Company expects to be entitled in exchange for those goods or services. Adoption of the new rules could affect the timing of revenue recognition for certain transactions of the Company. ASU No. 2014-09 is effective for the Company in the first quarter of fiscal 2018 using either one of two methods: (i) retrospectively to each prior reporting period presented with the option to elect certain practical expedients as defined within ASU No. 2014-09; or (ii) retrospectively with the cumulative effect of initially applying ASU No. 2014-09 recognized at the date of initial application and providing certain additional disclosures as defined per ASU No. 2014-09. The Company is currently evaluating the impact of adoption and the implementation approach to be used. In January 2016, FASB issued ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities". This guidance makes targeted improvements to existing US GAAP for financial instruments, including requiring equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; requiring entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; requiring separate presentation of financial assets and financial liabilities by measurement category and form of financial asset and requiring entities to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option. The new guidance is effective for public companies for fiscal years beginning after December 15, 2017. Early adoption of the own credit provision is permitted. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). ASU No. 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve month term, these arrangements must now be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU No. 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. The balance sheet amount recorded for existing leases at the date of adoption of ASU No. 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. In addition, ASU No. 2016-02 requires the use of the modified retrospective method, which will require adjustment to all comparative periods presented in the consolidated financial statements. The new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements and the implementation approach to be used. In March 2016, FASB issued ASU No. 2016-05, Derivatives and Hedging: Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships, which clarifies that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not, in and of itself, require de-designation of that hedging relationship provided that all other hedge accounting criteria continue to be met. The new guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. An entity has the option to apply ASU No. 2016-05 on either a prospective basis or a modified retrospective basis. Early adoption is permitted. The adoption of ASU No. 2016-05 is not expected to have a material effect on the Company's consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-07, “Investments – Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting.” Among other things, the amendments in ASU No. 2016-07 eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. Early adoption is permitted. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). ASU No. 2016-08 clarifies the implementation guidance on principal versus agent considerations. The guidance includes indicators to assist an entity in determining whether it controls a specified good or service before it is transferred to the customers. The amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, Compensation – Stock Compensation (Topic 718). ASU No. 2016-09 identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement of cash flows. The amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted but all of the guidance must be adopted in the same period. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements.

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Schedule of Other Current Assets	Other current assets consists of the following: March 31, 2016 December 31, 2015 Derivative instruments $ 3,831 $ 3,009 Advances to suppliers 1,534 1,545 Receivables from statutory authorities 9,372 8,676 Others 5,009 1,989 Other current assets $ 19,746 $ 15,219
Summary of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consists of the following: March 31, 2016 December 31, 2015 Accrued expenses $ 25,264 $ 26,238 Derivative instruments 413 1,226 Client liability account 2,972 2,217 Other current liabilities 9,252 4,569 Accrued expenses and other current liabilities $ 37,901 $ 34,250
Summary of Non-current Liabilities	Non-current liabilities consists of the following: March 31, 2016 December 31, 2015 Derivative instruments $ 568 $ 1,132 Unrecognized tax benefits 3,112 3,066 Deferred rent 6,864 6,515 Retirement benefits 1,472 1,441 Other non-current liabilities 1,549 5,501 Non-current liabilities $ 13,565 $ 17,655
Schedule of Accumulated Other Comprehensive Income (Loss)	The balances as of March 31, 2016 and December 31, 2015 are as follows: December 31, 2015 December 31, 2015 Cumulative currency translation adjustments $ (67,030 ) $ (68,063 ) Unrealized gain on cash flow hedges, net of taxes of $1,035 and $657 2,826 824 Retirement benefits, net of taxes of ($194) and ($201) 117 (86 ) Accumulated other comprehensive loss $ (64,087 ) $ (67,325 )
Summary of Other Income, net	Other income, net consists of the following: Three months ended March 31, 2016 2015 Interest and dividend income* $ 2,222 $ 1,402 Interest expense (385 ) (283 ) Change in fair value of earn-out consideration** 250 — Other, net 707 59 Other income, net $ 2,794 $ 1,178 * Includes unrealized gain of $1,525 and $42 on investments carried under ASC topic 825, "Financial Instruments" ("ASC 825"), fair value option for the three months ended March 31, 2016 and 2015 respectively. ** Reduction in the Company's liability of earn-out consideration related to its acquisition of RPM Direct, LLC and RPM Data Solutions, LLC (the "RPM Acquisition") from $4,060 as of December 31, 2015 to $3,810 as of March 31, 2016 recognized as other income.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted earnings per share: Three months ended March 31, 2016 2015 Numerators: Net income $ 13,820 $ 9,567 Denominators: Basic weighted average common shares outstanding 33,380,028 33,236,259 Dilutive effect of share based awards 971,629 815,712 Diluted weighted average common shares outstanding 34,351,657 34,051,971 Earnings per share: Basic $ 0.41 $ 0.29 Diluted $ 0.40 $ 0.28 Weighted average common shares considered anti-dilutive in computing diluted earnings per share 200,752 188,044

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Revenues and Cost of Revenues for Company's Operations Management and Analytics and Business Transformation Segments	Revenues and cost of revenues for the three months ended March 31, 2016 and 2015 for Operations Management and Analytics segments, respectively, are as follows: Three Months Ended Three Months Ended Operations Management Analytics Total Operations Management Analytics Total Revenues, net $ 128,070 $ 38,966 $ 167,036 $ 123,853 $ 19,657 $ 143,510 Cost of revenues (exclusive of depreciation and amortization) 83,608 24,771 108,379 79,729 13,396 93,125 Gross profit $ 44,462 $ 14,195 $ 58,657 $ 44,124 $ 6,261 $ 50,385 Operating expenses 42,205 36,917 Foreign exchange gain and other income, net 3,263 2,312 Income tax expense 5,895 6,213 Net income $ 13,820 $ 9,567

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Summary of Company's Goodwill	The following table sets forth details of the Company’s goodwill balance as of March 31, 2016 : Operations Management Analytics Total Balance at January 1, 2015 $ 122,814 $ 16,785 $ 139,599 Goodwill arising from RPM acquisition — 33,155 33,155 Currency translation adjustments (1,219 ) — (1,219 ) Balance at December 31, 2015 $ 121,595 $ 49,940 $ 171,535 Currency translation adjustments (37 ) — (37 ) Balance at March 31, 2016 $ 121,558 $ 49,940 $ 171,498
Summary of Company's Intangible Assets	Information regarding the Company’s intangible assets is set forth below: As of March 31, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships $ 64,815 $ (26,193 ) $ 38,622 Developed technology 12,234 (4,866 ) 7,368 Trade names and trademarks 5,670 (2,828 ) 2,842 Leasehold benefits 2,785 (2,157 ) 628 Non-compete agreements 2,045 (1,492 ) 553 $ 87,549 $ (37,536 ) $ 50,013 As of December 31, 2015 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships $ 64,816 $ (24,215 ) $ 40,601 Developed technology 12,234 (4,363 ) 7,871 Trade names and trademarks 5,670 (2,683 ) 2,987 Leasehold benefits 2,789 (2,109 ) 680 Non-compete agreements 2,045 (1,451 ) 594 $ 87,554 $ (34,821 ) $ 52,733
Estimated Amortization of Intangible Assets	The Company has $900 of indefinite lived trade names and trademarks as of March 31, 2016 and December 31, 2015 . Estimated amortization of intangible assets during the year ending March 31, 2017 $ 10,866 2018 $ 10,731 2019 $ 10,416 2020 $ 8,354 2021 $ 8,746

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value	The following table sets forth the Company’s assets and liabilities that were accounted for at fair value as of March 31, 2016 and December 31, 2015 . The table excludes accounts receivable, accounts payable and accrued expenses for which fair values approximate their carrying amounts. As of March 31, 2016 Level 1 Level 2 Level 3 Total Assets Money market and mutual funds* $ 102,686 $ — $ — $ 102,686 Derivative financial instruments — 5,003 — 5,003 Total $ 102,686 $ 5,003 $ — $ 107,689 Liabilities Derivative financial instruments $ — $ 981 $ — $ 981 Fair value of earn-out consideration — — 3,810 3,810 Total $ — $ 981 $ 3,810 $ 4,791 As of December 31, 2015 Level 1 Level 2 Level 3 Total Assets Money market and mutual funds $ 118,478 $ — $ — $ 118,478 Derivative financial instruments — 4,184 — 4,184 Total $ 118,478 $ 4,184 $ — $ 122,662 Liabilities Derivative financial instruments $ — $ 2,358 $ — $ 2,358 Fair value of earn-out consideration — — 4,060 4,060 Total $ — $ 2,358 $ 4,060 $ 6,418 * Includes short-term investments carried on fair value option under ASC 825 of $82,536 as of March 31, 2016.

Derivatives and Hedge Account30

Derivatives and Hedge Accounting (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Fair Value of Foreign Currency Exchange Contracts	The following tables set forth the fair value of the foreign currency exchange contracts and their location on the unaudited consolidated financial statements: Derivatives designated as hedging instruments: March 31, 2016 December 31, 2015 Other current assets: Foreign currency exchange contracts $ 3,670 $ 2,664 Other assets: Foreign currency exchange contracts $ 1,172 $ 1,175 Accrued expenses and other current liabilities: Foreign currency exchange contracts $ 413 $ 1,226 Other non current liabilities: Foreign currency exchange contracts $ 568 $ 1,132 Derivatives not designated as hedging instruments: March 31, 2016 December 31, 2015 Other current assets: Foreign currency exchange contracts $ 161 $ 345
Summary of Effect of Foreign Currency Exchange Contracts on Consolidated Statements of Income	The following tables set forth the effect of foreign currency exchange contracts on the unaudited consolidated statements of income for the three months ended March 31, 2016 and 2015 : Derivatives in Cash Flow Hedging Relationships Amount of Gain/(Loss) Recognized in AOCI on Derivative (Effective Portion) Location of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion) Amount of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion) Location of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) 2016 2015 2016 2015 2016 2015 Foreign exchange contracts $ 2,437 $ 2,259 Foreign exchange gain/(loss) $ 57 $ (309 ) Foreign exchange gain/(loss) $ — $ — Derivatives not designated as Hedging Instruments Amount of Gain/(Loss) Recognized in Income on Derivatives Location of Gain or (Loss) Recognized in Income on Derivatives 2016 2015 Foreign exchange contracts Foreign exchange gain/(loss) $ 1,729 $ 2,096

Fixed Assets (Tables)

Fixed Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Schedule of Fixed Assets	Fixed assets consist of the following: March 31, 2016 December 31, 2015 Owned Assets: Network equipment, computers and software $ 98,600 $ 95,245 Leasehold improvements 29,037 28,603 Office furniture and equipment 14,283 14,000 Capital work in progress 4,166 3,140 Buildings 1,200 1,202 Land 786 787 Motor vehicles 567 540 148,639 143,517 Less: Accumulated depreciation and amortization (101,583 ) (96,079 ) $ 47,056 $ 47,438 Assets under capital leases: Leasehold improvements $ 874 $ 877 Office furniture and equipment 134 136 Motor vehicles 813 806 1,821 1,819 Less: Accumulated depreciation and amortization (1,337 ) (1,266 ) $ 484 $ 553 Fixed assets, net $ 47,540 $ 47,991

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Net Gratuity Cost	Net gratuity cost includes the following components: Three months ended March 31, 2016 2015 Service cost $ 400 $ 423 Interest cost 149 142 Expected return on plan assets (104 ) (100 ) Actuarial loss 22 55 Net gratuity cost $ 467 $ 520
Change in Plan Assets	Change in Plan Assets Plan assets at January 1, 2016 $ 4,923 Actual return 109 Benefits paid (253 ) Effect of exchange rate changes (10 ) Plan assets at March 31, 2016 $ 4,769

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2016
Leases [Abstract]
Future Minimum Lease Payments under Capital Leases	Future minimum lease payments under these capital leases as of March 31, 2016 are as follows: Year ending March 31, 2017 $ 358 2018 168 2019 83 2020 41 Total minimum lease payments 650 Less: amount representing interest 86 Present value of minimum lease payments 564 Less: current portion 286 Long term capital lease obligation $ 278
Future Minimum Lease Payments under Non-Cancelable Operating Lease Agreements	Future minimum lease payments under non-cancelable agreements expiring after March 31, 2016 are set forth below: Year ending March 31, 2017 $ 7,729 2018 5,642 2019 4,506 2020 3,303 2021 1,986 2022 and thereafter 1,101 $ 24,267

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Summary of Activity Related to Gross Unrecognized Tax Benefits	The following table summarizes the activity related to the gross unrecognized tax benefits from January 1, 2016 through March 31, 2016 : Balance as of January 1, 2016 $ 2,797 Increases related to prior year tax positions — Decreases related to prior year tax positions — Increases related to current year tax positions — Decreases related to current year tax positions — Effect of exchange rate changes (4 ) Balance as of March 31, 2016 $ 2,793

Stock Based Compensation (Table

Stock Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Costs Related to Company's Stock-Based Compensation Plan	The following costs related to the Company’s stock-based compensation plan are included in the unaudited consolidated statements of income: Three months ended March 31, 2016 2015 Cost of revenue $ 1,265 $ 1,103 General and administrative expenses 2,372 1,483 Selling and marketing expenses 2,172 1,669 Total $ 5,809 $ 4,255
Stock Based Compensation Stock Option Activity	Stock option activity under the Company’s stock plans is shown below: Number of Weighted- Aggregate Weighted- Outstanding at December 31, 2015 1,210,141 $ 16.31 34,638 3.50 Granted — — Exercised (163,788 ) 12.27 Forfeited — — Outstanding at March 31, 2016 1,046,353 $ 16.94 36,477 3.68 Vested and exercisable at March 31, 2016 1,046,353 $ 16.94 36,477 3.68
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Activity Under Company's Stock Plans	Restricted stock and restricted stock unit activity under the Company’s stock plans is shown below: Restricted Stock Restricted Stock Units Number Weighted- Average Intrinsic Value Number Weighted- Average Intrinsic Value Outstanding at December 31, 2015* 129,638 $ 35.53 1,228,287 $ 30.06 Granted — — 377,294 48.54 Vested (12,212 ) 35.91 (300,821 ) 28.31 Forfeited — — (28,344 ) 27.61 Outstanding at March 31, 2016* 117,426 $ 35.49 1,276,416 $ 35.98 * As of March 31, 2016 and December 31, 2015 restricted stock units vested for which the underlying common stock is yet to be issued are 154,973 and 149,364 , respectively.
Performance Based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Activity Under Company's Stock Plans	Performance restricted stock unit (the "PRSU's") activity under the Company’s stock plans is shown below: Revenue Based PRSUs Market Condition Based PRSUs Number Weighted Avg Fair Value Number Weighted Avg Fair Value Outstanding at December 31, 2015 107,213 $ 30.88 207,212 $ 38.80 Granted 59,861 48.57 59,859 67.94 Vested — — — — Forfeited (3,750 ) 34.75 (3,750 ) 54.63 Outstanding at March 31, 2016 163,324 $ 37.28 263,321 $ 45.20

Geographical Information (Table

Geographical Information (Tables)	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Revenues Based on Geographical Information	The Company attributes the revenues to regions based upon location of its customers. Three months ended March 31, 2016 2015 Revenues, net United States $ 134,074 $ 111,865 United Kingdom 27,428 25,835 Rest of World 5,534 5,810 $ 167,036 $ 143,510
Fixed Assets, Net Based on Geographical Information	March 31, 2016 December 31, 2015 Fixed assets, net India $ 23,511 $ 23,415 United States 9,806 10,680 Philippines 11,461 11,285 Rest of World 2,762 2,611 $ 47,540 $ 47,991

Organization and Basis of Pre37

Organization and Basis of Presentation Organization and Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2015operating_segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments merged	2

Summary of Significant Accoun38

Summary of Significant Accounting Policies - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Prepaid Expense and Other Assets, Current [Abstract]
Derivative instruments	$ 3,831	$ 3,009
Advances to suppliers	1,534	1,545
Receivables from statutory authorities	9,372	8,676
Others	5,009	1,989
Other Assets, Current	$ 19,746	$ 15,219

Summary of Significant Accoun39

Summary of Significant Accounting Policies - Summary of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued expenses	$ 25,264	$ 26,238
Derivative instruments	413	1,226
Client liability account	2,972	2,217
Other current liabilities	9,252	4,569
Accrued expenses and other current liabilities	$ 37,901	$ 34,250

Summary of Significant Accoun40

Summary of Significant Accounting Policies - Summary of Non-current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Derivative instruments	$ 568	$ 1,132
Unrecognized tax benefits	3,112	3,066
Deferred rent	6,864	6,515
Retirement benefits	1,472	1,441
Other non-current liabilities	1,549	5,501
Non-current liabilities	$ 13,565	$ 17,655

Summary of Significant Accoun41

Summary of Significant Accounting Policies - Summary of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Cumulative currency translation adjustments	$ (67,030)	$ (68,063)
Unrealized gain on cash flow hedges, net of taxes of $1,035 and $657	2,826	824
Retirement benefits, net of taxes of ($194) and ($201)	117	(86)
Accumulated other comprehensive loss	(64,087)	(67,325)
Unrealized gain / (loss) on cash flow hedges, taxes	1,035	657
Retirement benefits, taxes	$ (194)	$ (201)

Summary of Significant Accoun42

Summary of Significant Accounting Policies - Summary of Other Income, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Other Nonoperating Income (Expense) [Abstract]
Interest and dividend income	$ 2,222	$ 1,402
Interest expense	(385)	(283)
Change in fair value of earn-out consideration	250	0
Other, net	707	59
Other income, net	2,794	1,178
Unrealized gain on investments	1,525	$ 42
Fair value of earn-out consideration	$ 3,810		$ 4,060

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerators:
Net income	$ 13,820	$ 9,567
Denominators:
Basic weighted average common shares outstanding (in shares)	33,380,028	33,236,259
Dilutive effect of share based awards (in shares)	971,629	815,712
Diluted weighted average common shares outstanding (in shares)	34,351,657	34,051,971
Earnings Per Share:
Basic (in dollars per share)	$ 0.41	$ 0.29
Diluted (in dollars per share)	$ 0.40	$ 0.28
Weighted average common shares considered anti-dilutive in computing diluted earnings per share (in shares)	200,752	188,044

Segment Information - Additiona

Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015operating_segment
Segment Reporting [Abstract]
Number of operating segments merged	2

Segment Information - Revenues

Segment Information - Revenues and Cost of Revenues for Company's Operations Management and Analytics and Business Transformation Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues and cost of revenues for Company's outsourcing services and transformation services segments [Line Items]
Revenues, net	$ 167,036	$ 143,510
Cost of revenues (exclusive of depreciation and amortization)	108,379	93,125
Gross profit	58,657	50,385
Operating expenses	42,205	36,917
Foreign exchange gain and other income, net	3,263	2,312
Income tax expense	5,895	6,213
Net income	13,820	9,567
Operations Management
Revenues and cost of revenues for Company's outsourcing services and transformation services segments [Line Items]
Revenues, net	128,070	123,853
Cost of revenues (exclusive of depreciation and amortization)	83,608	79,729
Gross profit	44,462	44,124
Analytics
Revenues and cost of revenues for Company's outsourcing services and transformation services segments [Line Items]
Revenues, net	38,966	19,657
Cost of revenues (exclusive of depreciation and amortization)	24,771	13,396
Gross profit	$ 14,195	$ 6,261

Goodwill and Intangible Asset46

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 2,715	$ 2,059
Indefinite lived trade names and trademarks	$ 900		$ 900
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)	6 years 2 months 2 days
Leasehold benefits
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)	3 years 2 months 24 days
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)	4 years 6 months
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)	3 years 3 months
Trade names and trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)	6 years

Goodwill and Intangible Asset47

Goodwill and Intangible Assets - Summary of Company's Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning Balance	$ 171,535	$ 139,599
Currency translation adjustments	(37)	(1,219)
Ending Balance	171,498	171,535
RPM Direct LLC and RPM Data Solutions LLC
Goodwill [Roll Forward]
Goodwill arising from acquisition		33,155
Operations Management
Goodwill [Roll Forward]
Beginning Balance	121,595	122,814
Currency translation adjustments	(37)	(1,219)
Ending Balance	121,558	121,595
Operations Management | RPM Direct LLC and RPM Data Solutions LLC
Goodwill [Roll Forward]
Goodwill arising from acquisition		0
Analytics
Goodwill [Roll Forward]
Beginning Balance	49,940	16,785
Ending Balance	$ 49,940	49,940
Analytics | RPM Direct LLC and RPM Data Solutions LLC
Goodwill [Roll Forward]
Goodwill arising from acquisition		$ 33,155

Goodwill and Intangible Asset48

Goodwill and Intangible Assets - Summary of Company's Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 87,549	$ 87,554
Accumulated Amortization	(37,536)	(34,821)
Net Carrying Amount	50,013	52,733
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	64,815	64,816
Accumulated Amortization	(26,193)	(24,215)
Net Carrying Amount	38,622	40,601
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,234	12,234
Accumulated Amortization	(4,866)	(4,363)
Net Carrying Amount	7,368	7,871
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,670	5,670
Accumulated Amortization	(2,828)	(2,683)
Net Carrying Amount	2,842	2,987
Leasehold benefits
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,785	2,789
Accumulated Amortization	(2,157)	(2,109)
Net Carrying Amount	628	680
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,045	2,045
Accumulated Amortization	(1,492)	(1,451)
Net Carrying Amount	$ 553	$ 594

Goodwill and Intangible Asset49

Goodwill and Intangible Assets - Estimated Amortization of Intangible Assets (Detail) $ in Thousands	Mar. 31, 2016USD ($)
Business Combinations [Abstract]
2,017	$ 10,866
2,018	10,731
2,019	10,416
2,020	8,354
2,021	$ 8,746

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Liabilities
Fair value of earn-out consideration	$ 3,810	$ 4,060
Investments carried at fair value	82,536
Recurring
Assets
Money market and mutual funds	102,686	118,478
Derivative financial instruments	5,003	4,184
Total	107,689	122,662
Liabilities
Derivative financial instruments	981	2,358
Fair value of earn-out consideration	3,810	4,060
Total	4,791	6,418
Recurring | Level 1
Assets
Money market and mutual funds	102,686	118,478
Total	102,686	118,478
Recurring | Level 2
Assets
Money market and mutual funds	0
Derivative financial instruments	5,003	4,184
Total	5,003	4,184
Liabilities
Derivative financial instruments	981	2,358
Total	981	2,358
Recurring | Level 3
Assets
Money market and mutual funds	0
Liabilities
Derivative financial instruments	0	0
Fair value of earn-out consideration	3,810	4,060
Total	$ 3,810	$ 4,060

Derivatives and Hedge Account51

Derivatives and Hedge Accounting - Additional Information (Detail) £ in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Mar. 31, 2016GBP (£)	Dec. 31, 2015USD ($)	Dec. 31, 2015GBP (£)
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses which could be reclassified into earnings within the next 12 months	$ 3,257
Maximum outstanding term of cash flow hedges (in months)	45 months
Gain/(losses) that reclassified from AOCI into earning for discontinued hedging transactions	$ 0	$ 0
Derivatives Designated as Hedging Instruments | Derivatives in Cash Flow Hedging Relationships | Foreign Currency Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange contracts outstanding	218,365			$ 230,894
Derivatives not Designated as Hedging Instruments | Foreign Currency Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange contracts outstanding	$ 59,290		£ 14,147	$ 61,641	£ 13,256

Derivatives and Hedge Account52

Derivatives and Hedge Accounting - Summary of Fair Value of Foreign Currency Exchange Contracts (Detail) - Foreign Currency Exchange Contracts - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivatives Designated as Hedging Instruments | Other current assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	$ 3,670	$ 2,664
Derivatives Designated as Hedging Instruments | Other assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	1,172	1,175
Derivatives Designated as Hedging Instruments | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability	413	1,226
Derivatives Designated as Hedging Instruments | Other non current liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability	568	1,132
Derivatives not Designated as Hedging Instruments | Other current assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	$ 161	$ 345

Derivatives and Hedge Account53

Derivatives and Hedge Accounting - Summary of Effect of Foreign Currency Exchange Contracts on Consolidated Statements of Income (Detail) - Foreign Currency Exchange Contracts - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivatives Designated as Hedging Instruments | Derivatives in Cash Flow Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in AOCI on Derivative (Effective Portion)	$ 2,437	$ 2,259
Foreign exchange gain/(loss) | Derivatives Designated as Hedging Instruments | Derivatives in Cash Flow Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion)	57	(309)
Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0
Foreign exchange gain/(loss) | Derivatives not Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives	$ 1,729	$ 2,096

Fixed Assets - Schedule of Fixe

Fixed Assets - Schedule of Fixed Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Owned Assets:
Owned Assets, Gross	$ 148,639	$ 143,517
Less: Accumulated depreciation and amortization	(101,583)	(96,079)
Owned Assets, net	47,056	47,438
Assets under capital leases:
Capital leased assets, gross	1,821	1,819
Less: Accumulated depreciation and amortization	(1,337)	(1,266)
Assets under capital leases, net	484	553
Fixed assets, net	47,540	47,991
Network equipment, computers and software
Owned Assets:
Owned Assets, Gross	98,600	95,245
Leasehold improvements
Owned Assets:
Owned Assets, Gross	29,037	28,603
Assets under capital leases:
Capital leased assets, gross	874	877
Office furniture and equipment
Owned Assets:
Owned Assets, Gross	14,283	14,000
Assets under capital leases:
Capital leased assets, gross	134	136
Capital work in progress
Owned Assets:
Owned Assets, Gross	4,166	3,140
Buildings
Owned Assets:
Owned Assets, Gross	1,200	1,202
Land
Owned Assets:
Owned Assets, Gross	786	787
Motor vehicles
Owned Assets:
Owned Assets, Gross	567	540
Assets under capital leases:
Capital leased assets, gross	$ 813	$ 806

Fixed Assets - Additional Infor

Fixed Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 5,418	$ 4,994

Capital Structure - Additional

Capital Structure - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016USD ($)ClassOfCommonStock$ / sharesshares	Mar. 31, 2015USD ($)$ / sharesshares	Dec. 30, 2014USD ($)
Equity, Class of Treasury Stock [Line Items]
Number of classes of common stock outstanding | ClassOfCommonStock	1
Acquisition of restricted stock from employees in connection with withholding tax payments (in shares) | shares	14,548	12,866
Withholding tax payments related to the vesting of restricted stock for total consideration	$ 652,000	$ 397,000
Weighted average purchase price per share prior to the vesting date (in dollars per share) | $ / shares	$ 44.83	$ 30.83
2014 Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock authorized by board of directors up to			$ 20,000,000
Stock repurchase program, period start (year)	2,015
Stock repurchase program, period end (year)	2,017
Common stock shares purchased under the repurchase program (in shares) | shares	138,638	0
Common stock aggregate purchase price including commissions	$ 6,202,000
Common stock average purchase price per share (in dollars per share) | $ / shares	$ 44.74

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) - USD ($)	Oct. 24, 2014	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Feb. 23, 2015
Credit Facilities [Line Items]
Other short-term borrowings		$ 10,000,000		$ 10,000,000
Revolving Credit Facility
Credit Facilities [Line Items]
Revolving credit facility	$ 50,000,000	$ 65,000,000		70,000,000
Debt instrument, term (in years)	5 years
Option to increase additional credit facility	$ 50,000,000				$ 50,000,000
Credit facility expiration date		Oct. 24, 2019
Other short-term borrowings		$ 10,000,000
Line of credit interest rate during period (as a percent)		1.90%	1.56%
Unamortized debt issuance costs		$ 344,000		$ 368,000

Employee Benefit Plans - Net Gr

Employee Benefit Plans - Net Gratuity Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 400	$ 423
Interest cost	149	142
Expected return on plan assets	(104)	(100)
Actuarial loss	22	55
Net gratuity cost	$ 467	$ 520

Employee Benefit Plans - Change

Employee Benefit Plans - Change in Plan Assets (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at January 1, 2016	$ 4,923
Actual return	109
Benefits paid	(253)
Effect of exchange rate changes	(10)
Plan assets at March 31, 2016	$ 4,769

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Expected return on plan assets (as a percent)	9.00%
Percentage of discretionary contributions towards 401(k) Plan, Maximum (as a percent)	3.00%	3.00%
Company's contribution to the 401(k) Plan	$ 932	$ 768
Contribution to various defined contribution plans	$ 1,466	$ 1,465

Leases - Future Minimum Lease P

Leases - Future Minimum Lease Payments under Capital Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Leases [Abstract]
2,017	$ 358
2,018	168
2,019	83
2,020	41
Total minimum lease payments	650
Less: amount representing interest	86
Present value of minimum lease payments	564
Less: current portion	286	$ 384
Long term capital lease obligation	$ 278	$ 278

Leases - Future Minimum Lease62

Leases - Future Minimum Lease Payments under Non-Cancelable Operating Lease Agreements Expiring After December 31, 2014 (Detail) $ in Thousands	Mar. 31, 2016USD ($)
Leases [Abstract]
2,017	$ 7,729
2,018	5,642
2,019	4,506
2,020	3,303
2,021	1,986
2022 and thereafter	1,101
Total operating lease payments	$ 24,267

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Leases [Abstract]
Rent expense under both cancelable and non-cancelable operating leases	$ 5,148	$ 4,985
Deferred rent	$ 7,419		$ 7,066

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax expense	$ 5,895	$ 6,213
Effective tax rates (as a percent)	29.90%	39.40%
Reversal of unrecognized tax benefit	$ 0	$ 1,818
Unrecognized tax benefits	2,793		$ 2,797
Recognized interest and penalties	0	$ 99
Accrued interest on unrecognized tax benefits	$ 1,319		$ 1,269

Income Taxes - Summary of Activ

Income Taxes - Summary of Activity Related to Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance as of January 1, 2016	$ 2,797
Increases related to prior year tax positions	0
Decreases related to prior year tax positions	0	$ (1,818)
Increases related to current year tax positions	0
Decreases related to current year tax positions	0
Effect of exchange rate changes	(4)
Balance as of March 31, 2016	$ 2,793

Stock Based Compensation - Cost

Stock Based Compensation - Costs Related to Company's Stock-Based Compensation Plan (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expenses	$ 5,809	$ 4,255
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expenses	1,265	1,103
General and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expenses	2,372	1,483
Selling and marketing expenses
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expenses	$ 2,172	$ 1,669

Stock Based Compensation - Addi

Stock Based Compensation - Additional Information (Detail)	Mar. 31, 2016shares
2015 Stock Options Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	1,968,977

Stock Based Compensation - Stoc

Stock Based Compensation - Stock Based Compensation Stock Option Activity (Detail) - Employee Stock Option - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options, Outstanding, at December 31, 2015 (in shares)	1,210,141
Number of Options, Granted (in shares)	0
Number of Options, Exercised (in shares)	(163,788)
Number of Options, Forfeited (in shares)	0
Number of Options, Outstanding, at March 31, 2016 (in shares)	1,046,353	1,210,141
Number of Options, Vested and exercisable at March 31, 2016 (in shares)	1,046,353
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-Average Exercise Price, Outstanding, at December 31, 2015 (in dollars per share)	$ 16.31
Weighted-Average Exercise Price, Granted (in dollars per share)	0
Weighted-Average Exercise Price, Exercised (in dollars per share)	12.27
Weighted-Average Exercise Price, Forfeited (in dollars per share)	0
Weighted-Average Exercise Price, Outstanding, at March 31, 2016 (in dollars per share)	16.94	$ 16.31
Weighted Average Exercise Price, Vested and exercisable at March 31, 2016 (in dollars per share)	$ 16.94
Aggregate Intrinsic Value, Outstanding	$ 36,477	$ 34,638
Weighted-Average Remaining Contractual Life (in years)	3 years 8 months 5 days	3 years 6 months
Aggregate Intrinsic Value, Vested and exercisable at March 31, 2016	$ 36,477
Weighted-Average Remaining Contractual Life, Vested and exercisable at March 31, 2016 (in years)	3 years 8 months 5 days

Stock Based Compensation - St69

Stock Based Compensation - Stock Options Additional Information (Details) - Employee Stock Option - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options	$ 0
Total grant date fair value of option vested in period	$ 706	$ 1,126

Stock Based Compensation - Rest

Stock Based Compensation - Restricted Stock Activity Under Company's Stock Plans (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number, Outstanding, at December 31, 2015 (in shares)	129,638
Number, Granted (in shares)	0
Number, Vested (in shares)	(12,212)
Number, Forfeited (in shares)	0
Number, Outstanding, at March 31, 2016 (in shares)	117,426
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Fair Value, Outstanding, at December 31, 2015 (in dollars per share)	$ 35.53
Weighted-Average Fair Value, Granted (in dollars per share)	0
Weighted-Average Fair Value, Vested (in dollars per share)	35.91
Weighted-Average Fair Value, Forfeited (in dollars per share)	0
Weighted-Average Fair Value, Outstanding, at March 31, 2016 (in dollars per share)	$ 35.49
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number, Outstanding, at December 31, 2015 (in shares)	1,228,287
Number, Granted (in shares)	377,294
Number, Vested (in shares)	(300,821)
Number, Forfeited (in shares)	(28,344)
Number, Outstanding, at March 31, 2016 (in shares)	1,276,416
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Fair Value, Outstanding, at December 31, 2015 (in dollars per share)	$ 30.06
Weighted-Average Fair Value, Granted (in dollars per share)	48.54
Weighted-Average Fair Value, Vested (in dollars per share)	28.31
Weighted-Average Fair Value, Forfeited (in dollars per share)	27.61
Weighted-Average Fair Value, Outstanding, at March 31, 2016 (in dollars per share)	$ 35.98
Restricted stock units vested (in shares)	154,973	149,364

Stock Based Compensation - Re71

Stock Based Compensation - Restricted Stock and RSU Additional Information (Details) - Restricted Stock and Restricted Stock Units $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 43,496
Cost not yet recognized, period for recognition (in years)	3 years 4 days

Stock Based Compensation - Perf

Stock Based Compensation - Performance Restricted Stock Activity (Details)	3 Months Ended
	Mar. 31, 2016$ / sharesshares
Revenue Based PRSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number, Outstanding, at December 31, 2015 (in shares) | shares	107,213
Number, Granted (in shares) | shares	59,861
Number, Vested (in shares) | shares	0
Number, Forfeited (in shares) | shares	(3,750)
Number, Outstanding, at March 31, 2016 (in shares) | shares	163,324
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Fair Value, Outstanding, at December 31, 2015 (in dollars per share) | $ / shares	$ 30.88
Weighted-Average Fair Value, Granted (in dollars per share) | $ / shares	48.57
Weighted-Average Fair Value, Vested (in dollars per share) | $ / shares	0
Weighted-Average Fair Value, Forfeited (in dollars per share) | $ / shares	34.75
Weighted-Average Fair Value, Outstanding, at March 31, 2016 (in dollars per share) | $ / shares	$ 37.28
Market Condition Based PRSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number, Outstanding, at December 31, 2015 (in shares) | shares	207,212
Number, Granted (in shares) | shares	59,859
Number, Vested (in shares) | shares	0
Number, Forfeited (in shares) | shares	(3,750)
Number, Outstanding, at March 31, 2016 (in shares) | shares	263,321
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Fair Value, Outstanding, at December 31, 2015 (in dollars per share) | $ / shares	$ 38.80
Weighted-Average Fair Value, Granted (in dollars per share) | $ / shares	67.94
Weighted-Average Fair Value, Vested (in dollars per share) | $ / shares	0
Weighted-Average Fair Value, Forfeited (in dollars per share) | $ / shares	54.63
Weighted-Average Fair Value, Outstanding, at March 31, 2016 (in dollars per share) | $ / shares	$ 45.20

Stock Based Compensation - Pe73

Stock Based Compensation - Performance Based Stock Awards Additional Information (Details) - Performance Based Stock Awards $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 13,326
Cost not yet recognized, period for recognition (in years)	2 years 2 months 5 days

Geographical Information - Reve

Geographical Information - Revenues Based on Geographical Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues, net
Revenues, net	$ 167,036	$ 143,510
United States
Revenues, net
Revenues, net	134,074	111,865
United Kingdom
Revenues, net
Revenues, net	27,428	25,835
Rest of World
Revenues, net
Revenues, net	$ 5,534	$ 5,810

Geographical Information - Fixe

Geographical Information - Fixed Assets, Net Based on Geographical Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fixed assets, net
Fixed assets, net	$ 47,540	$ 47,991
India
Fixed assets, net
Fixed assets, net	23,511	23,415
United States
Fixed assets, net
Fixed assets, net	9,806	10,680
Philippines
Fixed assets, net
Fixed assets, net	11,461	11,285
Rest of World
Fixed assets, net
Fixed assets, net	$ 2,762	$ 2,611

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Purchase commitments, net of advances	$ 6,510
Export-oriented units established (as a percent)	100.00%
Transfer pricing issues starting period (year)	2,003
Transfer pricing issues ending period (year)	2,013
Permanent establishment issues starting period (year)	2,003
Permanent establishment issues ending period (year)	2,007
Aggregate disputed amount amount related to transfer pricing and permanent establishment	$ 20,835	$ 21,360
Total bank guarantees and deposits in respect of contingencies	14,342	14,668
Amounts paid as deposits in respect of contingencies	12,342	12,665
Bank guarantee issued	$ 2,000	$ 2,003