MicroStrategy (MSTR) 10-Q 26 Jul 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 16, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	MSTR
Entity Registrant Name	MICROSTRATEGY INC
Entity Central Index Key	1,050,446
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		9,432,210
Class B Convertible
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,035,184

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 90,427	$ 420,244
Restricted cash	964	938
Short-term investments	609,167	254,927
Accounts receivable, net	125,115	165,364
Prepaid expenses and other current assets	27,863	19,180
Total current assets	853,536	860,653
Property and equipment, net	51,918	53,359
Capitalized software development costs, net	0	2,499
Deposits and other assets	7,112	7,411
Deferred tax assets, net	14,761	9,297
Total assets	927,327	933,219
Current liabilities:
Accounts payable and accrued expenses	22,670	30,711
Accrued compensation and employee benefits	38,617	41,498
Deferred revenue and advance payments	175,358	198,734
Total current liabilities	236,645	270,943
Deferred revenue and advance payments	5,816	6,400
Other long-term liabilities	64,503	50,146
Deferred tax liabilities	4	4
Total liabilities	306,968	327,493
Commitments and Contingencies
Stockholders' Equity
Preferred stock undesignated, $0.001 par value; 5,000 shares authorized; no shares issued or outstanding	0	0
Additional paid-in capital	570,502	559,918
Treasury stock, at cost; 6,405 shares	(475,184)	(475,184)
Accumulated other comprehensive loss	(8,111)	(5,659)
Retained earnings	533,134	526,633
Total stockholders' equity	620,359	605,726
Total liabilities and stockholders' equity	927,327	933,219
Class A
Stockholders' Equity
Common stock	16	16
Class B Convertible
Stockholders' Equity
Common stock	$ 2	$ 2

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, shares	6,405,000	6,405,000
Class A
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	330,000,000	330,000,000
Common stock, shares issued	15,837,000	15,817,000
Common stock, shares outstanding	9,432,000	9,412,000
Class B Convertible
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	165,000,000	165,000,000
Common stock, shares issued	2,035,000	2,035,000
Common stock, shares outstanding	2,035,000	2,035,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Total revenues		$ 120,602	$ 119,220	$ 243,569	$ 241,452
Cost of revenues:
Total cost of revenues		25,040	24,375	50,225	47,507
Gross profit		95,562	94,845	193,344	193,945
Operating expenses:
Sales and marketing		50,978	41,626	102,313	81,208
Research and development		25,082	19,561	48,642	37,987
General and administrative		21,299	19,582	43,471	39,839
Total operating expenses		97,359	80,769	194,426	159,034
(Loss) income from operations		(1,797)	14,076	(1,082)	34,911
Interest income, net		3,223	1,163	5,257	2,000
Other income (expense), net		4,461	(2,618)	2,867	(4,474)
Income before income taxes		5,887	12,621	7,042	32,437
Provision for income taxes		1,059	2,668	541	6,927
Net income		$ 4,828	$ 9,953	$ 6,501	$ 25,510
Basic earnings per share	[1]	$ 0.42	$ 0.87	$ 0.57	$ 2.23
Weighted average shares outstanding used in computing basic earnings per share		11,459	11,444	11,453	11,441
Diluted earnings per share	[1]	$ 0.42	$ 0.86	$ 0.57	$ 2.20
Weighted average shares outstanding used in computing diluted earnings per share		11,493	11,592	11,488	11,593
Product licenses
Revenues:
Total revenues		$ 19,292	$ 17,728	$ 36,593	$ 40,374
Cost of revenues:
Total cost of revenues		1,667	1,747	3,878	3,419
Subscription services
Revenues:
Total revenues		7,584	8,346	15,246	16,118
Cost of revenues:
Total cost of revenues		3,445	3,400	6,694	6,439
Total product licenses and subscription services
Revenues:
Total revenues		26,876	26,074	51,839	56,492
Cost of revenues:
Total cost of revenues		5,112	5,147	10,572	9,858
Product support
Revenues:
Total revenues		73,676	70,766	148,091	141,278
Cost of revenues:
Total cost of revenues		4,810	4,542	9,606	8,876
Other services
Revenues:
Total revenues		20,050	22,380	43,639	43,682
Cost of revenues:
Total cost of revenues		$ 15,118	$ 14,686	$ 30,047	$ 28,773
[1]	Basic and fully diluted earnings per share for class A and class B common stock are the same.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,828	$ 9,953	$ 6,501	$ 25,510
Other comprehensive income, net of applicable taxes:
Foreign currency translation adjustment	(3,892)	2,257	(2,452)	3,305
Unrealized loss on short-term investments			0	(30)
Total other comprehensive (loss) income	(3,892)	2,257	(2,452)	3,275
Comprehensive income	$ 936	$ 12,210	$ 4,049	$ 28,785

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities:
Net income	$ 6,501	$ 25,510
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,870	8,540
Bad debt expense	948	1,835
Deferred taxes	(5,758)	(3,654)
Share-based compensation expense	8,121	6,889
Changes in operating assets and liabilities:
Accounts receivable	5,044	16,033
Prepaid expenses and other current assets	453	(992)
Deposits and other assets	(344)	(275)
Accounts payable and accrued expenses	(7,775)	(15,472)
Accrued compensation and employee benefits	(3,015)	(10,712)
Deferred revenue and advance payments	10,502	11,058
Other long-term liabilities	4,780	(1,647)
Net cash provided by operating activities	23,327	37,113
Investing activities:
Proceeds from redemption of short-term investments	245,680	151,860
Purchases of property and equipment	(2,644)	(1,467)
Purchases of short-term investments	(596,376)	(216,602)
Net cash used in investing activities	(353,340)	(66,209)
Financing activities:
Proceeds from sale of class A common stock under exercise of employee stock options	2,471	1,677
Payments on capital lease obligations and other financing arrangements	(9)	(12)
Net cash provided by financing activities	2,462	1,665
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash	(2,240)	5,246
Net decrease in cash, cash equivalents, and restricted cash	(329,791)	(22,185)
Cash, cash equivalents and restricted cash, beginning of period	421,182	402,712
Cash, cash equivalents and restricted cash, end of period	$ 91,391	$ 380,527

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	(1) Summary of Significant Accounting Policies (a) Basis of Presentation The accompanying Consolidated Financial Statements of MicroStrategy Incorporated (“MicroStrategy” or the “Company”) are unaudited. In the opinion of management, all adjustments necessary for a fair statement of financial position and results of operations have been included. All such adjustments are of a normal recurring nature, unless otherwise disclosed. Interim results are not necessarily indicative of results for a full year. Certain amounts in the prior year’s Consolidated Financial Statements have been restated upon the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) The Consolidated Financial Statements and Notes to Consolidated Financial Statements are presented as required by the United States Securities and Exchange Commission (“SEC”) and do not contain certain information included in the Company’s annual financial statements and notes. These financial statements should be read in conjunction with the Company’s audited financial statements and the notes thereto filed with the SEC in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. There have been no significant changes in the Company’s accounting policies since December 31, 2017, except as discussed below with respect to the Company’s adoption of ASU 2014-09. The accompanying Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company is not aware of any subsequent event which would require recognition or disclosure. (b) Revenue Recognition The Company adopted ASU 2014-09 effective as of January 1, 2018 and has adjusted its prior period consolidated financial statements to reflect full retrospective adoption. Refer to Note 2, Recent Accounting Standards, to the Consolidated Financial Statements for a summary of the significant changes in accounting principles and the impact to the Company’s previously reported consolidated financial statements. Under ASU 2014-09, the Company recognizes revenue using a five-step model: (i) Identifying the contract(s) with a customer, (ii) Identifying the performance obligation, (iii) Determining the transaction price, (iv) Allocating the transaction price to the performance obligations in the contract, and (v) Recognizing revenue when, or as, the Company satisfies a performance obligation. The Company has elected to exclude taxes assessed by government authorities in determining the transaction price, and therefore revenue is recognized net of taxes collected from customers. Performance Obligations and Timing of Revenue Recognition The Company primarily sells goods and services that fall into the categories discussed below. Each category contains one or more performance obligations that are either (i) capable of being distinct (i.e., the customer can benefit from the good or service on its own or together with readily available resources, including those purchased separately from the Company) and distinct within the context of the contract (i.e., separately identifiable from other promises in the contract), or (ii) a series of distinct goods or services that are substantially the same and have the same pattern of transfer to the customer. Aside from the Company’s term and perpetual software licenses, which are delivered at a point in time, the majority of the Company’s other services are delivered over time. Product Licenses The Company sells different types of on-premise business intelligence software, licensed on a term or perpetual basis. Although license arrangements are sold with product support, the software is fully functional at the outset of the arrangement and is considered a distinct performance obligation. Revenue from product license sales is recognized when control of the software license has transferred to the customer, which is the later of delivery or commencement of the license term. The Company may also sell through resellers and original equipment manufacturers (“OEMs”) who purchase the Company’s products for resale. In reseller arrangements, revenue is recognized when control of the product is transferred to the end user. In OEM arrangements, revenue is recognized upon delivery to the OEM. Subscription Services The Company also sells access to its software through a subscription-based cloud offering, wherein customers access the software through a third-party hosting service. Control of the software itself does not transfer to the customer under this arrangement and is not considered a separate performance obligation. Subscription services are regularly sold on a standalone basis with telephone support only. Revenue related to this subscription service is recognized on a straight-line basis over the contract period, which is the period over which the customer has continuous access to the software. Product Support In all license arrangements, customers are required to purchase a standard product support package and may also purchase a premium product support package for a fixed annual fee. All product support packages include both technical support and when-and-if-available software upgrades, which are treated as a single performance obligation as they are considered a series of distinct services that are substantially the same and have the same duration and measure of progress. Revenue from product support is recognized on a straight-line basis over the contract period, which is the period over which the customer has continuous access to product support. Consulting Services The Company sells consulting services to help customers plan and execute deployment of the Company’s software. Customers are not required to use consulting services to fully benefit from the software license. Consulting services are regularly sold on a standalone basis and either (i) prepaid upfront or (ii) sold on a time and materials basis. Consulting arrangements are each considered separate performance obligations because they do not integrate with each other or with other products and services to deliver a combined output to the customer, do not modify or customize (or are not modified or customized by) each other or other products and services, and do not affect the customer’s ability to use the other consulting offerings or other products and services. Revenue under consulting arrangements is recognized over time as services are delivered. For time and materials-based consulting arrangements, the Company has elected the practical expedient of recognizing revenue upon invoicing since the invoiced amount corresponds directly to the value of the Company’s service to date. Education Services The Company sells various education and training services to its customers. Education services are sold on a standalone basis under three different arrangements: (i) prepaid bulk training units that may be redeemed on training courses based on standard redemption rates, (ii) an annual subscription to unlimited training courses, and (iii) individual courses purchased a la carte. Education arrangements are each considered separate performance obligations because they do not integrate with each other or with other products and services to deliver a combined output to the customer, do not modify or customize (or are not modified or customized by) each other or other products and services, or affect the customer’s ability to use the other education offerings or other products and services. Revenue on prepaid bulk training units and individual course purchases are recognized when the courses are delivered. Revenue on the annual subscription is recognized on a straight-line basis over the contract period, which is the period over which the customer has continuous access to unlimited training courses. Refer to Note 10, Segment Information, to the Consolidated Financial Statements for information regarding total revenues by geographic region. Significant Judgments and Estimates The adoption of ASU 2014-09 requires the Company to make significant judgments to determine the transaction price of a contract and subsequently allocate the transaction price based on an estimated standalone selling price (“SSP”). The Company is also required to make significant judgements with respect to capitalizing incremental costs to obtain a customer contract and determining the subsequent amortization period. These significant judgments and estimates are discussed further below. Determining the Transaction Price The transaction price includes both fixed and variable consideration. Variable consideration is included in the transaction price to the extent it is probable that a significant reversal will not occur. The amount of variable consideration excluded from the transaction price was not material for the three and six months ended June 30, 2018 and 2017. The Company’s estimates of variable consideration are also subject to subsequent true-up adjustments and may result in changes to its transaction prices, but such true-up adjustments are not expected to be material. The Company has the following sources of variable consideration: (i) Performance penalties – Subscription services and product support arrangements generally contain performance response time guarantees. For subscription services arrangements, the Company estimates variable consideration using a portfolio approach because performance penalties are tied to standard up-time requirements. For product support arrangements, the Company estimates variable consideration on a contract basis because such arrangements are customer-specific. For both subscription services and product support arrangements, the Company uses an expected value approach to estimate variable consideration based on historical business practices and current and future performance expectations to determine the likelihood of incurring penalties. (ii) Extended payment terms – The Company’s standard payment terms are generally within 180 days of invoicing. If extended payment terms are granted to customers, those terms generally do not exceed one year. For contracts with extended payment terms, the Company estimates variable consideration on a contract basis because such estimates are customer-specific, and uses an expected value approach to analyze historical business experience on a customer-by-customer basis to determine the likelihood that extended payment terms lead to an implied price concession. (iii) Sales and usage-based royalties – Certain product license arrangements include sales or usage-based royalties, covering both the software license and product support. In these arrangements, the Company uses an expected value approach to estimate and recognize revenue for royalty sales each period, utilizing historical data on a contract-by-contract basis. True-up adjustments are recorded in subsequent periods when royalty reporting is received from the OEM partners. The Company provides a standard software assurance warranty to repair, replace, or refund software that does not perform in accordance with documentation. The standard software assurance warranty period is generally less than one year. Assurance warranty claims were not material for the three and six months ended June 30, 2018 and 2017. The Company does not adjust the transaction price for significant financing components where the time period between cash payment and performance is one year or less. However, there are circumstances where the timing between cash payment and performance may exceed one year. These circumstances generally involve prepaid multi-year product support and subscription services arrangements where the customer determines when the service is utilized (e.g., when to request on-call support services or when to use and access the software on the cloud). In these circumstances, the Company has determined no significant financing component exists because the customer controls when to utilize the service and because there are significant business purposes behind the timing difference between payment and performance (e.g., maximizing profit in the case of product support services and ensuring collectability in the case of subscription services). Allocating the Transaction Price Based on Standalone Selling Prices The Company allocates the transaction price to each performance obligation in a contract based on its relative SSP. The SSP is the price at which the Company sells the product or service on a standalone basis at contract inception. In circumstances where SSP is not directly observable, the Company estimates SSP using the following methodologies: (i) Product licenses – Product licenses are not sold on a standalone basis and pricing is highly variable. The Company establishes SSP of product licenses using a residual approach after first establishing the SSP of standard product support. Standard product support is sold on a standalone basis within a narrow range of the net license fee, and because an economic relationship exists between product licenses and standard product support, the Company has concluded that the residual method to estimate SSP of product licenses sold on both a perpetual and term basis is a fair allocation of the transaction price. (ii) Subscription services – Given the highly variable selling price of subscription services, the Company establishes the SSP of its subscription services arrangements using a similar residual approach after first establishing the SSP of consulting and education services. The Company has concluded that the residual method to estimate SSP of its subscription services is a fair allocation of the transaction price. (iii) Standard product support – The Company establishes SSP of standard product support as a percentage of the stated net license fee, given such pricing is consistent with its normal pricing practices and there exists sufficient history of customers renewing at similar percentages. Each quarter, the Company tracks renewal rates negotiated when standard product support is initially sold with a perpetual license in order to determine the SSP of standard product support within each geographic region for the upcoming quarter. If the stated standard product support fee falls within the SSP range, the specific rate in the contract will be used to estimate SSP. If the stated fee is above or below SSP, the highest or lowest end of the range, respectively, will generally be used to estimate SSP of standard product support. (iv) Premium product support, consulting services, and education services –SSP of premium product support, consulting services, and education services is established by using a bell-shaped curve approach to define a narrow range within each geographic region in which the services are discounted off of the list price on a standalone basis. The Company often provides options to purchase future products or services at a discount. The Company analyzes the option price against the previously established SSP of the goods or services to determine if the options represent material rights that should be accounted for as separate performance obligations. In general, options sold at or above SSP are not considered separate performance obligations because the customer could have received that right without entering into the contract. If a material right exists, revenue associated with the option is recognized when the future goods or services are transferred, or when the option expires. During the three and six months ended June 30, 2018 and 2017, rights arising from future purchase options have not been material. Incremental Costs to Obtain Customer Contracts Incremental costs incurred to obtain contracts with customers include certain variable compensation (e.g., commissions and bonuses) paid to the Company’s sales team. Although the Company may bundle its goods and services into one contract, commissions are individually determined on each distinct good or service in the contract. The Company expenses as incurred those amounts earned on consulting and education services, which are generally performed within a one-year period and primarily sold on a standalone basis. The Company also expenses as incurred those amounts earned on product license sales, since the amount is earned when the license is delivered. The Company capitalizes those amounts earned on product support and amortizes the costs over a period of time that is consistent with the pattern of transfer of the product support to the customer, which the Company has determined to be a period of three years. Although the Company typically sells product support for a period of one year, a majority of customers renew their product support arrangements. Three years is generally the period after which platforms are no longer supported by the Company's support team and when customers generally choose to upgrade their software platform. The Company does not pay variable compensation on product support renewals. Variable compensation earned on subscription cloud services are expensed as incurred due to their immaterial nature. As of June 30, 2018 and December 31, 2017, capitalized costs to obtain customer contracts, net of accumulated amortization, were $4.0 million and $4.5 million, respectively, and are presented within “Deposits and other assets” in the Consolidated Balance Sheets. During the three and six months ended June 30, 2018 and 2017, amortization expense related to these capitalized costs were $0.4 million and $1.1 million, and $0.7 million and $1.4 million, respectively.

Recent Accounting Standards

Recent Accounting Standards	6 Months Ended
	Jun. 30, 2018
Accounting Changes And Error Corrections [Abstract]
Recent Accounting Standards	(2) Recent Accounting Standards Revenue from contracts with customers The Company adopted ASU 2014-09 effective as of January 1, 2018 and adjusted prior period consolidated financial statements to reflect full retrospective adoption. In adopting ASU 2014-09, the Company has made the following significant changes in accounting principles: (i) Timing of revenue recognition for term license sales. (ii) Timing of revenue recognition for sales to channel partners (iii) Allocating the transaction price to the performance obligations in the contract. (iv) Material rights. (v) Presentation of accounts receivable, contract assets, and contract liabilities (deferred revenue). (vi) Deferral of incremental direct costs to obtaining a contract with a customer. Upon adoption of ASU 2014-09, the Company recorded a cumulative $13.0 million increase to its 2016 beginning retained earnings balance, offset by a $12.9 million decrease in gross deferred revenues, a $5.2 million decrease in deferred tax assets, net of deferred tax liabilities, a $4.4 million increase in other non-current assets, and a $0.9 million increase in other current assets. The following line items as of December 31, 2017 and for the three and six months ended June 30, 2017 have been adjusted in the Consolidated Financial Statements to reflect the adoption of ASU 2014-09: December 31, 2017 Consolidated Balance Sheet As Reported (audited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Accounts receivable, net $ 69,500 $ 95,864 $ 165,364 Prepaid expenses and other current assets 18,002 1,178 19,180 Deposits and other assets 2,868 4,543 7,411 Deferred tax assets, net 13,391 (4,094 ) 9,297 Deferred revenue and advance payments 112,649 86,085 198,734 Deferred revenue and advance payments, non-current 10,181 (3,781 ) 6,400 Accumulated other comprehensive loss (5,968 ) 309 (5,659 ) Retained earnings 511,755 14,878 526,633 Three Months Ended June 30, 2017 Consolidated Statement of Operations: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Product licenses revenue $ 19,118 $ (1,390 ) $ 17,728 Sales and marketing expenses 41,419 207 41,626 Provision for income taxes 3,142 (474 ) 2,668 Net income 11,076 (1,123 ) 9,953 Diluted earnings per share 0.96 (0.10 ) 0.86 Six Months Ended June 30, 2017 Consolidated Statement of Operations: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Product licenses revenue $ 40,130 $ 244 $ 40,374 Product support revenues 141,256 22 141,278 Sales and marketing expenses 80,829 379 81,208 Provision for income taxes 6,607 320 6,927 Net income 25,943 (433 ) 25,510 Diluted earnings per share 2.24 (0.04 ) 2.20 Three Months Ended June 30, 2017 Consolidated Statement of Comprehensive Income: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Net income $ 11,076 $ (1,123 ) $ 9,953 Foreign currency translation adjustment 2,218 39 2,257 Comprehensive income 13,294 (1,084 ) 12,210 Six Months Ended June 30, 2017 Consolidated Statement of Comprehensive Income: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Net income $ 25,943 $ (433 ) $ 25,510 Foreign currency translation adjustment 3,030 275 3,305 Comprehensive income 28,943 (158 ) 28,785 Six Months Ended June 30, 2017 Consolidated Statement of Cash Flows: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Net income $ 25,943 $ (433 ) $ 25,510 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization 7,133 1,407 8,540 Deferred taxes (4,015 ) 361 (3,654 ) Changes in operating assets and liabilities: Prepaid expenses and other current assets (699 ) (293 ) (992 ) Deposits and other assets (274 ) (1 ) (275 ) Accrued compensation and employee benefits (9,685 ) (1,027 ) (10,712 ) Deferred revenue and advance payments 11,072 (14 ) 11,058 Intra-entity asset transfers In October 2016, the FASB issued Accounting Standards Update No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory Lease accounting In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842)

Short-term Investments

Short-term Investments	6 Months Ended
	Jun. 30, 2018
Short Term Investments [Abstract]
Short-term Investments	(3) Short-term Investments The Company periodically invests a portion of its excess cash in short-term investment instruments. Substantially all of the Company’s short-term investments are in U.S. Treasury securities, and the Company has the ability and intent to hold these investments to maturity. The stated maturity dates of these investments are between three months and one year from the purchase date. These held-to-maturity investments are recorded at amortized cost and included within “Short-term investments” on the accompanying Consolidated Balance Sheets. The fair value of held-to-maturity investments is determined based on quoted market prices in active markets for identical securities (Level 1 inputs). The amortized cost, carrying value, and fair value of held-to-maturity investments at June 30, 2018 were $609.2 million, $609.2 million, and $608.6 million, respectively. The amortized cost, carrying value, and fair value of held-to-maturity investments at December 31, 2017 were $254.9 million, $254.9 million, and $254.8 million, respectively. The gross unrecognized holding gains and losses were not material for each of the three and six months ended June 30, 2018 and 2017. No other-than-temporary impairments related to these investments have been recognized as of June 30, 2018 and December 31, 2017.

Contract Balances

Contract Balances	6 Months Ended
	Jun. 30, 2018
Contract With Customer Asset And Liability [Abstract]
Contract Balances	(4) Contract Balances The Company invoices its customers in accordance with billing schedules established in each contract. The Company’s rights to consideration from customers are presented separately in the Company’s Consolidated Balance Sheets depending on whether those rights are conditional or unconditional. The Company presents unconditional rights to consideration from customers within “Accounts receivable, net” in its Consolidated Balance Sheets. All of the Company’s contracts are generally non-cancellable and/or non-refundable and therefore an unconditional right generally exists when the customer is billed or amounts are billable per the contract. Accounts receivable (in thousands) consisted of the following, as of: June 30, December 31, 2018 2017 (as adjusted) Billed and billable $ 129,034 $ 169,554 Less: allowance for doubtful accounts (3,919 ) (4,190 ) Accounts receivable, net $ 125,115 $ 165,364 The Company maintains an allowance for doubtful accounts which represents its best estimate of probable losses inherent in the accounts receivable balances. The Company evaluates specific accounts when it becomes aware that a customer may not be able to meet its financial obligations due to deterioration of its liquidity or financial viability, credit ratings, or bankruptcy. In addition, the Company periodically adjusts this allowance based on its review and assessment of the aging of receivables. For the three and six months ended June 30, 2018 and 2017, the Company’s bad debt expense and write-offs totaled $0.8 million and $0.9 million, and $0.8 million and $1.8 million, respectively. In contrast, rights to consideration that are subject to a condition other than the passage of time are considered contract assets and presented within “Prepaid expenses and other current assets” in the Consolidated Balance Sheets since the rights to consideration are expected to become unconditional and transfer to accounts receivable within one year. Contract assets generally consist of accrued sales and usage-based royalty revenue. In these arrangements, consideration is not billed or billable until the royalty reporting is received, generally in the subsequent quarter, at which time the contract asset will transfer to accounts receivable and a true-up adjustment will be recorded to revenue. During the three and six months ended June 30, 2018 and 2017, there were no significant impairments to the Company’s contract assets, nor were there any significant changes in the timing of the Company’s contract assets being reclassified to accounts receivable. Contract assets included in “Prepaid expenses and other current assets” in the Consolidated Balance Sheets consisted of $0.5 million and $1.2 million in accrued sales and usage-based royalty revenue, as of June 30, 2018 and December 31, 2017, respectively. Contract liabilities are amounts received or due from customers in advance of the Company transferring the products or services to the customer. Revenue is subsequently recognized in the period(s) in which control of the products or services are transferred to the customer. The Company’s contract liabilities are presented as either current or non-current “Deferred revenues and advance payments” in the Consolidated Balance Sheets, depending on whether the products or services are expected to be transferred to the customer within the next year. Deferred revenue and advance payments (in thousands) from customers consisted of the following, as of: June 30, December 31, 2018 2017 (as adjusted) Current: Deferred product licenses revenue $ 1,819 $ 3,760 Deferred subscription services revenue 13,847 17,324 Deferred product support revenue 151,909 168,185 Deferred other services revenue 7,783 9,465 Total current deferred revenue and advance payments $ 175,358 $ 198,734 Non-current: Deferred product licenses revenue $ 794 $ 820 Deferred subscription services revenue 9 126 Deferred product support revenue 3,950 4,826 Deferred other services revenue 1,063 628 Total non-current deferred revenue and advance payments $ 5,816 $ 6,400 During the three and six months ended June 30, 2018 and 2017, the Company recognized revenues of $56.8 million and $131.3 million, and $55.7 million and $130.5 million, respectively, from amounts included in the total current deferred revenue and advance payments balances at the beginning of the respective year. For the three and six months ended June 30, 2018 and 2017, there were no significant changes in the timing of revenue recognition on the Company’s deferred balances. As of June 30, 2018, the Company had an aggregate transaction price of $181.2 million allocated to unsatisfied performance obligations related to product support, subscription services, other services, and product licenses contracts. The Company expects to recognize $175.4 million within the next year and $5.8 million thereafter.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	(5) Commitments and Contingencies (a) Commitments From time to time, the Company enters into certain types of contracts that require it to indemnify parties against third-party claims. These contracts primarily relate to agreements under which the Company assumes indemnity obligations for intellectual property infringement, as well as other obligations from time to time depending on arrangements negotiated with customers and other third parties. The conditions of these obligations vary. Thus, the overall maximum amount of the Company’s indemnification obligations cannot be reasonably estimated. Historically, the Company has not been obligated to make significant payments for these obligations and does not currently expect to incur any material obligations in the future. Accordingly, the Company has not recorded an indemnification liability on its balance sheets as of June 30, 2018 or December 31, 2017. The Company leases office space and computer and other equipment under operating lease agreements. Under the lease agreements, in addition to base rent, the Company is generally responsible for certain taxes, utilities and maintenance costs, and other fees. Several of these leases include options for renewal or purchase. The Company does not have any material capital leases. The Company leases approximately 214,000 square feet of office space at a location in Northern Virginia that began serving as its corporate headquarters in October 2010. In January 2018, the Company amended the lease to extend the lease term through December 2030. The amended lease also provides for certain tenant allowances and incentives. At June 30, 2018 and December 31, 2017, deferred rent of $27.3 million and $8.5 million, respectively, was included in other long-term liabilities. As a result of the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”), the Company estimated and recorded a one-time $40.3 million tax expense related to the mandatory deemed repatriation transition tax (“Transition Tax”) during the year ended December 31, 2017. At June 30, 2018, $32.5 million of the Transition Tax was unpaid and was included in “Other long-term liabilities.” (b) Contingencies The Company is involved in various legal proceedings arising in the normal course of business. Although the outcomes of these legal proceedings are inherently difficult to predict, management does not expect the resolution of these legal proceedings to have a material adverse effect on the Company’s financial position, results of operations, or cash flows. The Company has contingent liabilities that, in management’s judgment, are not probable of assertion. If such unasserted contingent liabilities were to be asserted, or become probable of assertion, the Company may be required to record significant expenses and liabilities in the period in which these liabilities are asserted or become probable of assertion.

Treasury Stock

Treasury Stock	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Treasury Stock	(6) Treasury Stock The Board of Directors previously authorized the Company’s repurchase of up to an aggregate of $800.0 million of its class A common stock from time to time on the open market through April 29, 2018 (the “2005 Share Repurchase Program”). In April 2018, the Board of Directors extended the term of the 2005 Share Repurchase Program through April 29, 2023, although the program may be suspended or discontinued by the Company at any time. The timing and amount of any shares repurchased will be determined by the Company’s management based on its evaluation of market conditions and other factors. The 2005 Share Repurchase Program may be funded using the Company’s working capital, as well as proceeds from any other funding arrangements that the Company may enter into in the future. During the three and six months ended June 30, 2018 and 2017, the Company did not repurchase any shares of its class A common stock pursuant to the 2005 Share Repurchase Program. As of June 30, 2018, the Company had repurchased an aggregate of 3,826,947 shares of its class A common stock at an average price per share of $90.23 and an aggregate cost of $345.3 million. The average price per share and aggregate cost amounts disclosed above include broker commissions.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	(7) Income Taxes The Company and its subsidiaries conduct business in the United States and various foreign countries and are subject to taxation in numerous domestic and foreign jurisdictions. As a result of its business activities, the Company files tax returns that are subject to examination by various federal, state and local, and foreign tax authorities. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or foreign income tax examination by tax authorities for years before 2014. However, due to its use of state net operating loss (“NOL”) and federal tax credit carryovers in the United States, U.S. tax authorities may attempt to reduce or fully offset the amount of state NOL or federal tax credit carryovers from tax years ended 2006 and forward that were used in later tax years. The Company’s major foreign tax jurisdictions and tax years that remain subject to potential examination are Germany for tax years 2016 and forward, Poland and China for tax years 2013 and forward, Spain for tax years 2014 and forward, and the United Kingdom for tax years 2016 and forward. To date there have been no material audit assessments related to audits in any of the applicable foreign jurisdictions. As of June 30, 2018, the Company had unrecognized tax benefits of $4.1 million, which are recorded in “Other long-term liabilities” in the Company’s Consolidated Balance Sheets. If recognized, $3.6 million of these unrecognized tax benefits would impact the effective tax rate. The Company recognizes estimated accrued interest related to unrecognized income tax benefits in the provision for income tax accounts. Penalties relating to income taxes, if incurred, would also be recognized as a component of the Company’s provision for income taxes. Over the next 12 months, the amount of the Company’s liability for unrecognized tax benefits is not expected to change by a material amount. As of June 30, 2018, the amount of cumulative accrued interest expense on unrecognized income tax benefits was approximately $0.7 million. The following table summarizes the Company’s deferred tax assets, net of deferred tax liabilities and valuation allowance (in thousands), as of: June 30, December 31, 2018 2017 (as adjusted) Deferred tax assets, net of deferred tax liabilities $ 15,772 $ 10,308 Valuation allowance (1,015 ) (1,015 ) Deferred tax assets, net of deferred tax liabilities and valuation allowance $ 14,757 $ 9,293 The valuation allowance as of June 30, 2018 and December 31, 2017 related to certain foreign tax credit carryforwards that, in the Company’s present estimation, more likely than not will not be realized. The Company has estimated its annual effective tax rate for the full fiscal year 2018 and applied that rate to its income before income taxes in determining its provision for income taxes for the six months ended June 30, 2018. The Company also records discrete items in each respective period as appropriate. The estimated effective tax rate is subject to fluctuation based on the level and mix of earnings and losses by tax jurisdiction, foreign tax rate differentials, and the relative impact of permanent book to tax differences (e.g., non-deductible expenses). Each quarter, a cumulative adjustment is recorded for any fluctuations in the estimated annual effective tax rate as compared to the prior quarter. As a result of these factors, and due to potential changes in the Company’s period-to-period results, fluctuations in the Company’s effective tax rate and respective tax provisions or benefits may occur. For the six months ended June 30, 2018, the Company recorded a provision for income taxes of $0.5 million that resulted in an effective tax rate of 7.7%, as compared to a provision for income taxes of $6.9 million that resulted in an effective tax rate of 21.4% for the six months ended June 30, 2017. The change in the effective tax rate in 2018 is mainly due to the change in the expected proportion of U.S. versus foreign income and the decrease in U.S. corporate tax rate. The Tax Act reduced the U.S. corporate tax rate from 35% to 21%, effective January 1, 2018. Additionally, the Tax Act requires certain Global Intangible Low Taxed Income (“GILTI”) earned by controlled foreign corporations (“CFCs”) to be included in the gross income of the CFCs’ U.S. shareholder. GAAP allows the Company to either: (i) treat taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the “period cost method”); or (ii) factor such amounts into its measurement of deferred taxes (the “deferred method”). The Company has elected the period cost method. The Tax Act allows a U.S. corporation a deduction equal to a certain percentage of its foreign-derived intangible income (“FDII”). The Company estimated the impact of the GILTI tax and FDII deduction in determining its 2018 annual effective tax rate that is reflected in its provision for income taxes for the six months ended June 30, 2018. The Company will continue to refine its calculation for the GILTI tax and FDII deduction in future quarters. The Tax Act also imposes a Transition Tax on previously untaxed accumulated and current earnings and profits (“E&P”) of certain foreign subsidiaries of the Company. The SEC staff issued Staff Accounting Bulletin (“SAB”) 118, which provides guidance on accounting for the tax effects of the Tax Act. SAB 118 provides a measurement period that should not extend beyond one year from the Tax Act enactment date for companies to complete the related accounting under ASC 740, Accounting for Income Taxes. In accordance with SAB 118, a company must disclose the income tax effects of the Tax Act for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain income tax effects of the Tax Act is incomplete but reasonable estimates can be determined, it must record provisional estimates in the financial statements. If a company cannot determine provisional estimates to be included in the financial statements, it should continue to apply ASC 740 based on the tax laws that were in effect immediately before the enactment of the Tax Act. The Company’s accounting for certain elements of the Tax Act was incomplete as of December 31, 2017 and remains incomplete as of June 30, 2018. However, the Company was able to make reasonable estimates of certain tax effects and recorded provisional estimates for these items. In connection with its initial analysis of the impact of the Tax Act, the Company recorded a provisional discrete net tax expense of $40.3 million, of which $32.5 million and $36.8 million were recorded in “Other long-term liabilities” in the Company’s Consolidated Balance Sheets as of June 30, 2018 and December 31, 2017, respectively, related to the one-time Transition Tax. To determine the Transition Tax, the Company must determine the amount of post-1986 accumulated E&P of the relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings. The Company has not made any further measurement period adjustments related to the Transition Tax. However, the Company expects to revise its estimates of E&P and associated non-U.S. income taxes throughout 2018 as the Company continues to analyze the impact of foreign exchange gains or losses and gathers support for non-U.S. income taxes paid. As the Company accumulates and processes data to finalize the underlying calculations, and as regulators issue further guidance, the Company’s estimates may change during 2018. The Company will continue to refine such amounts within the measurement period allowed, which it expects to complete no later than December 31, 2018. Likewise, while the Company was able to make a reasonable estimate of the impact of the reduced U.S. corporate tax rate, its effective tax rate may be affected by other aspects of the Tax Act, including, but not limited to, the impact of the Tax Act on state taxes. Except as discussed below, the Company intends to indefinitely reinvest its undistributed earnings of all of its foreign subsidiaries. U.S. federal tax laws require the Company to include in its U.S. taxable income certain investment income earned outside of the United States in excess of certain limits (“Subpart F deemed dividends”). Because Subpart F deemed dividends are already required to be recognized in the Company’s U.S. federal income tax return, the Company regularly repatriates Subpart F deemed dividends to the United States and no additional tax is incurred on the distribution. As of June 30, 2018 and December 31, 2017, the amount of cash and cash equivalents and short-term investments held by the Company’s U.S. entities was $300.1 million and $293.8 million, respectively, and by the Company’s non-U.S. entities was $399.5 million and $381.4 million, respectively. If the cash and cash equivalents and short-term investments held by the Company’s non-U.S. entities were to be repatriated to the United States, after taking into account the $40.3 million Transition Tax recorded during the year ended December 31, 2017, the Company does not expect such repatriation to generate any additional U.S. federal taxable income to the Company. In determining the Company’s provision for or benefit from income taxes, net deferred tax assets, liabilities, and valuation allowances, management is required to make judgments and estimates related to projections of domestic and foreign profitability, the timing and extent of the utilization of NOL carryforwards, applicable tax rates, transfer pricing methods, and prudent and feasible tax planning strategies. As a multinational company, the Company is required to calculate and provide for estimated income tax liabilities for each of the tax jurisdictions in which it operates. This process involves estimating current tax obligations and exposures in each jurisdiction, as well as making judgments regarding the future recoverability of deferred tax assets. Changes in the estimated level of annual pre-tax income, changes in tax laws, particularly changes related to the utilization of NOLs in various jurisdictions, and changes resulting from tax audits can all affect the overall effective income tax rate which, in turn, impacts the overall level of income tax expense or benefit and net income. Judgments and estimates related to the Company’s projections and assumptions are inherently uncertain. Therefore, actual results could differ materially from projections. The timing and manner in which the Company will use research and development tax credit carryforward tax assets, alternative minimum tax credit carryforward tax assets, and foreign tax credit carryforward tax assets in any year, or in total, may be limited by provisions of the Internal Revenue Code regarding changes in the Company’s ownership. Currently, the Company expects to use the tax assets, subject to Internal Revenue Code limitations, within the carryforward periods. Valuation allowances have been established where the Company has concluded that it is more likely than not that such deferred tax assets are not realizable. If the Company is unable to sustain profitability in future periods, it may be required to increase the valuation allowance against the deferred tax assets, which could result in a charge that would materially adversely affect net income in the period in which the charge is incurred.

Share-based Compensation

Share-based Compensation	6 Months Ended
	Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-based Compensation	(8) Share-based Compensation The Company’s 2013 Stock Incentive Plan (as amended, the “2013 Equity Plan”) authorizes the issuance of various types of share-based awards to the Company’s employees, officers, directors, and other eligible participants. In March 2018, the Board of Directors authorized, and in May 2018 the Company’s stockholders approved, a further amendment to the 2013 Equity Plan to, among other things, increase the total number of shares of the Company’s class A common stock authorized for issuance under the 2013 Equity Plan from 1,700,000 shares to 2,300,000 shares. As of June 30, 2018, there were 565,000 shares of class A common stock reserved and available for future issuance under the 2013 Equity Plan. Stock option awards During the second quarter of 2018, stock options to purchase an aggregate of 102,500 shares of class A common stock were granted pursuant to the 2013 Equity Plan. As of June 30, 2018, there were options to purchase 1,481,233 shares of class A common stock outstanding under the 2013 Equity Plan. The following table summarizes the Company’s stock option activity (in thousands, except per share data and years) for the three months ended June 30, 2018: Stock Options Outstanding Weighted Average Aggregate Weighted Average Exercise Price Intrinsic Remaining Contractual Shares Per Share Value Term (Years) Balance as of April 1, 2018 1,463 $ 140.83 Granted 103 128.27 Exercised (21 ) 121.13 $ 196 Forfeited/Expired (64 ) 163.25 Balance as of June 30, 2018 1,481 $ 139.26 Exercisable as of June 30, 2018 724 137.07 3,316 5.7 Expected to vest as of June 30, 2018 757 141.36 19 9.3 Total 1,481 $ 139.26 3,335 7.5 Stock options outstanding as of June 30, 2018 are comprised of the following range of exercise prices per share (in thousands, except per share data and years): Stock Options Outstanding at June 30, 2018 Weighted Average Weighted Average Exercise Price Remaining Contractual Range of Exercise Prices per Share Shares Per Share Term (Years) $117.85 - $120.00 23 $ 118.50 5.8 $120.01 - $150.00 1,109 $ 126.92 7.9 $150.01 - $180.00 178 $ 167.68 4.9 $180.01 - $201.25 171 $ 192.39 7.9 Total 1,481 $ 139.26 7.5 An aggregate of 157,500 stock options with an aggregate fair value of $8.9 million vested during the three months ended June 30, 2018. The weighted average grant date fair value of stock option awards using the Black-Scholes pricing model was $50.76 and $72.78 for each share subject to a stock option granted during the three months ended June 30, 2018 and 2017, respectively, based on the following assumptions: Three months ended June 30, 2018 2017 Expected term of options in years 6.3 6.3 Expected volatility 34.6% - 34.9 % 37.4 % Risk-free interest rate 2.7% - 2.8 % 1.9 % Expected dividend yield 0.0 % 0.0 % For the three and six months ended June 30, 2018, the Company recognized approximately $3.4 million and $8.1 million, respectively, in share-based compensation expense from stock options granted under the 2013 Equity Plan. For the three and six months ended June 30, 2017, the Company recognized approximately $3.8 million and $6.9 million, respectively, in share-based compensation expense from stock options granted under the 2013 Equity Plan. As of June 30, 2018, there was approximately $37.6 million of total unrecognized share-based compensation expense related to unvested stock options. The Company expects to recognize this remaining share-based compensation expense over a weighted average vesting period of approximately 3.3 years. Other stock-based awards During the second quarter of 2018, the Company granted certain awards characterized as “other stock-based awards” under the 2013 Equity Plan. These other stock-based awards are similar to stock options, but these awards are settled in cash only and not in shares of the Company’s class A common stock. Upon exercise of this award, the participant would be entitled to receive an amount in cash equal to the fair market value of the Company’s class A common stock in excess of a stated exercise price. These awards vest in equal annual installments over a four-year period (unless accelerated upon a change in control event (as defined in the applicable award agreement) or otherwise in accordance with the provisions of the 2013 Equity Plan or applicable award agreement). During the second quarter of 2018, the Company granted such other stock-based awards with respect to an aggregate of 10,000 underlying shares of class A common stock with a weighted average exercise price per share of $129.90 pursuant to the 2013 Equity Plan. Similar to stock option awards, the Company recognizes share-based compensation expense associated with these awards on a straight-line basis over the award’s requisite service period (generally, the vesting period), with share-based compensation expense based on the fair value of the award estimated using the Black-Scholes option pricing model. However, due to the required cash settlement feature, these awards are classified as liabilities in the Company’s Consolidated Balance Sheets and the fair value of the awards is remeasured each quarterly reporting period with resulting adjustments to share-based compensation expense recorded until the earlier of settlement or expiration. For each of the three and six months ended June 30, 2018, the Company did not recognize a material amount in share-based compensation expense from these awards. As of June 30, 2018, there was approximately $0.5 million of total unrecognized share-based compensation expense related to these awards. The Company expects to recognize this remaining share-based compensation expense over a weighted average vesting period of approximately 3.9 years, subject to additional fair value adjustments through the earlier of settlement or expiration.

Common Equity and Earnings per

Common Equity and Earnings per Share	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Common Equity and Earnings per Share	(9) Common Equity and Earnings per Share The Company has two classes of common stock: class A common stock and class B common stock. Holders of class A common stock generally have the same rights, including rights to dividends, as holders of class B common stock, except that holders of class A common stock have one vote per share while holders of class B common stock have ten votes per share. Each share of class B common stock is convertible at any time, at the option of the holder, into one share of class A common stock. As such, basic and fully diluted earnings per share for class A common stock and for class B common stock are the same. The Company has never declared or paid any cash dividends on either class A or class B common stock. As of June 30, 2018 and December 31, 2017, there were no shares of preferred stock issued or outstanding. Potential shares of common stock are included in the diluted earnings per share calculation when dilutive. Potential shares of common stock, consisting of common stock issuable upon exercise of outstanding stock options, are calculated using the treasury stock method. For the three and six months ended June 30, 2018, stock options issued under the 2013 Equity Plan to purchase a weighted average of approximately 938,000 and 830,000 shares of class A common stock, respectively, were excluded from the diluted earnings per share calculation because their impact would have been anti-dilutive. For the three and six months ended June 30, 2017, stock options issued under the 2013 Equity Plan to purchase a weighted average of approximately 401,000 and 373,000 shares of class A common stock, respectively, were excluded from the diluted earnings per share calculation because their impact would have been anti-dilutive.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Segment Information	(10) Segment Information The Company manages its business in one reportable operating segment. The Company’s one reportable operating segment is engaged in the design, development, marketing, and sales of its software platform through licensing arrangements and cloud-based subscriptions and related services. The following table presents total revenues, gross profit, and long-lived assets, excluding long-term deferred tax assets, (in thousands) according to geographic region: Geographic regions: Domestic EMEA Other Regions Consolidated Three months ended June 30, 2018 Total revenues $ 68,025 $ 38,008 $ 14,569 $ 120,602 Gross profit $ 53,239 $ 30,246 $ 12,077 $ 95,562 Three months ended June 30, 2017 (as adjusted) Total revenues $ 73,238 $ 34,024 $ 11,958 $ 119,220 Gross profit $ 58,107 $ 27,023 $ 9,715 $ 94,845 Six months ended June 30, 2018 Total revenues $ 140,104 $ 76,206 $ 27,259 $ 243,569 Gross profit $ 110,290 $ 60,761 $ 22,293 $ 193,344 Six months ended June 30, 2017 (as adjusted) Total revenues $ 148,802 $ 67,752 $ 24,898 $ 241,452 Gross profit $ 119,162 $ 54,229 $ 20,554 $ 193,945 As of June 30, 2018 Long-lived assets $ 50,722 $ 5,595 $ 2,713 $ 59,030 As of December 31, 2017 (as adjusted) Long-lived assets $ 55,355 $ 5,626 $ 2,288 $ 63,269 The domestic region consists of the United States and Canada. The EMEA region includes operations in Europe, the Middle East, and Africa. The other regions include all other foreign countries, generally comprising Latin America and the Asia Pacific region. For the three and six months ended June 30, 2018 and 2017, no individual foreign country accounted for 10% or more of total consolidated revenues. For the three and six months ended June 30, 2018 and 2017, no individual customer accounted for 10% or more of total consolidated revenues. As of June 30, 2018 and December 31, 2017, no individual foreign country accounted for 10% or more of total consolidated assets.

Summary of Significant Accoun17

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	(a) Basis of Presentation The accompanying Consolidated Financial Statements of MicroStrategy Incorporated (“MicroStrategy” or the “Company”) are unaudited. In the opinion of management, all adjustments necessary for a fair statement of financial position and results of operations have been included. All such adjustments are of a normal recurring nature, unless otherwise disclosed. Interim results are not necessarily indicative of results for a full year. Certain amounts in the prior year’s Consolidated Financial Statements have been restated upon the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) The Consolidated Financial Statements and Notes to Consolidated Financial Statements are presented as required by the United States Securities and Exchange Commission (“SEC”) and do not contain certain information included in the Company’s annual financial statements and notes. These financial statements should be read in conjunction with the Company’s audited financial statements and the notes thereto filed with the SEC in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. There have been no significant changes in the Company’s accounting policies since December 31, 2017, except as discussed below with respect to the Company’s adoption of ASU 2014-09. The accompanying Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company is not aware of any subsequent event which would require recognition or disclosure.
Revenue Recognition	(b) Revenue Recognition The Company adopted ASU 2014-09 effective as of January 1, 2018 and has adjusted its prior period consolidated financial statements to reflect full retrospective adoption. Refer to Note 2, Recent Accounting Standards, to the Consolidated Financial Statements for a summary of the significant changes in accounting principles and the impact to the Company’s previously reported consolidated financial statements. Under ASU 2014-09, the Company recognizes revenue using a five-step model: (i) Identifying the contract(s) with a customer, (ii) Identifying the performance obligation, (iii) Determining the transaction price, (iv) Allocating the transaction price to the performance obligations in the contract, and (v) Recognizing revenue when, or as, the Company satisfies a performance obligation. The Company has elected to exclude taxes assessed by government authorities in determining the transaction price, and therefore revenue is recognized net of taxes collected from customers. Performance Obligations and Timing of Revenue Recognition The Company primarily sells goods and services that fall into the categories discussed below. Each category contains one or more performance obligations that are either (i) capable of being distinct (i.e., the customer can benefit from the good or service on its own or together with readily available resources, including those purchased separately from the Company) and distinct within the context of the contract (i.e., separately identifiable from other promises in the contract), or (ii) a series of distinct goods or services that are substantially the same and have the same pattern of transfer to the customer. Aside from the Company’s term and perpetual software licenses, which are delivered at a point in time, the majority of the Company’s other services are delivered over time. Product Licenses The Company sells different types of on-premise business intelligence software, licensed on a term or perpetual basis. Although license arrangements are sold with product support, the software is fully functional at the outset of the arrangement and is considered a distinct performance obligation. Revenue from product license sales is recognized when control of the software license has transferred to the customer, which is the later of delivery or commencement of the license term. The Company may also sell through resellers and original equipment manufacturers (“OEMs”) who purchase the Company’s products for resale. In reseller arrangements, revenue is recognized when control of the product is transferred to the end user. In OEM arrangements, revenue is recognized upon delivery to the OEM. Subscription Services The Company also sells access to its software through a subscription-based cloud offering, wherein customers access the software through a third-party hosting service. Control of the software itself does not transfer to the customer under this arrangement and is not considered a separate performance obligation. Subscription services are regularly sold on a standalone basis with telephone support only. Revenue related to this subscription service is recognized on a straight-line basis over the contract period, which is the period over which the customer has continuous access to the software. Product Support In all license arrangements, customers are required to purchase a standard product support package and may also purchase a premium product support package for a fixed annual fee. All product support packages include both technical support and when-and-if-available software upgrades, which are treated as a single performance obligation as they are considered a series of distinct services that are substantially the same and have the same duration and measure of progress. Revenue from product support is recognized on a straight-line basis over the contract period, which is the period over which the customer has continuous access to product support. Consulting Services The Company sells consulting services to help customers plan and execute deployment of the Company’s software. Customers are not required to use consulting services to fully benefit from the software license. Consulting services are regularly sold on a standalone basis and either (i) prepaid upfront or (ii) sold on a time and materials basis. Consulting arrangements are each considered separate performance obligations because they do not integrate with each other or with other products and services to deliver a combined output to the customer, do not modify or customize (or are not modified or customized by) each other or other products and services, and do not affect the customer’s ability to use the other consulting offerings or other products and services. Revenue under consulting arrangements is recognized over time as services are delivered. For time and materials-based consulting arrangements, the Company has elected the practical expedient of recognizing revenue upon invoicing since the invoiced amount corresponds directly to the value of the Company’s service to date. Education Services The Company sells various education and training services to its customers. Education services are sold on a standalone basis under three different arrangements: (i) prepaid bulk training units that may be redeemed on training courses based on standard redemption rates, (ii) an annual subscription to unlimited training courses, and (iii) individual courses purchased a la carte. Education arrangements are each considered separate performance obligations because they do not integrate with each other or with other products and services to deliver a combined output to the customer, do not modify or customize (or are not modified or customized by) each other or other products and services, or affect the customer’s ability to use the other education offerings or other products and services. Revenue on prepaid bulk training units and individual course purchases are recognized when the courses are delivered. Revenue on the annual subscription is recognized on a straight-line basis over the contract period, which is the period over which the customer has continuous access to unlimited training courses. Refer to Note 10, Segment Information, to the Consolidated Financial Statements for information regarding total revenues by geographic region. Significant Judgments and Estimates The adoption of ASU 2014-09 requires the Company to make significant judgments to determine the transaction price of a contract and subsequently allocate the transaction price based on an estimated standalone selling price (“SSP”). The Company is also required to make significant judgements with respect to capitalizing incremental costs to obtain a customer contract and determining the subsequent amortization period. These significant judgments and estimates are discussed further below. Determining the Transaction Price The transaction price includes both fixed and variable consideration. Variable consideration is included in the transaction price to the extent it is probable that a significant reversal will not occur. The amount of variable consideration excluded from the transaction price was not material for the three and six months ended June 30, 2018 and 2017. The Company’s estimates of variable consideration are also subject to subsequent true-up adjustments and may result in changes to its transaction prices, but such true-up adjustments are not expected to be material. The Company has the following sources of variable consideration: (i) Performance penalties – Subscription services and product support arrangements generally contain performance response time guarantees. For subscription services arrangements, the Company estimates variable consideration using a portfolio approach because performance penalties are tied to standard up-time requirements. For product support arrangements, the Company estimates variable consideration on a contract basis because such arrangements are customer-specific. For both subscription services and product support arrangements, the Company uses an expected value approach to estimate variable consideration based on historical business practices and current and future performance expectations to determine the likelihood of incurring penalties. (ii) Extended payment terms – The Company’s standard payment terms are generally within 180 days of invoicing. If extended payment terms are granted to customers, those terms generally do not exceed one year. For contracts with extended payment terms, the Company estimates variable consideration on a contract basis because such estimates are customer-specific, and uses an expected value approach to analyze historical business experience on a customer-by-customer basis to determine the likelihood that extended payment terms lead to an implied price concession. (iii) Sales and usage-based royalties – Certain product license arrangements include sales or usage-based royalties, covering both the software license and product support. In these arrangements, the Company uses an expected value approach to estimate and recognize revenue for royalty sales each period, utilizing historical data on a contract-by-contract basis. True-up adjustments are recorded in subsequent periods when royalty reporting is received from the OEM partners. The Company provides a standard software assurance warranty to repair, replace, or refund software that does not perform in accordance with documentation. The standard software assurance warranty period is generally less than one year. Assurance warranty claims were not material for the three and six months ended June 30, 2018 and 2017. The Company does not adjust the transaction price for significant financing components where the time period between cash payment and performance is one year or less. However, there are circumstances where the timing between cash payment and performance may exceed one year. These circumstances generally involve prepaid multi-year product support and subscription services arrangements where the customer determines when the service is utilized (e.g., when to request on-call support services or when to use and access the software on the cloud). In these circumstances, the Company has determined no significant financing component exists because the customer controls when to utilize the service and because there are significant business purposes behind the timing difference between payment and performance (e.g., maximizing profit in the case of product support services and ensuring collectability in the case of subscription services). Allocating the Transaction Price Based on Standalone Selling Prices The Company allocates the transaction price to each performance obligation in a contract based on its relative SSP. The SSP is the price at which the Company sells the product or service on a standalone basis at contract inception. In circumstances where SSP is not directly observable, the Company estimates SSP using the following methodologies: (i) Product licenses – Product licenses are not sold on a standalone basis and pricing is highly variable. The Company establishes SSP of product licenses using a residual approach after first establishing the SSP of standard product support. Standard product support is sold on a standalone basis within a narrow range of the net license fee, and because an economic relationship exists between product licenses and standard product support, the Company has concluded that the residual method to estimate SSP of product licenses sold on both a perpetual and term basis is a fair allocation of the transaction price. (ii) Subscription services – Given the highly variable selling price of subscription services, the Company establishes the SSP of its subscription services arrangements using a similar residual approach after first establishing the SSP of consulting and education services. The Company has concluded that the residual method to estimate SSP of its subscription services is a fair allocation of the transaction price. (iii) Standard product support – The Company establishes SSP of standard product support as a percentage of the stated net license fee, given such pricing is consistent with its normal pricing practices and there exists sufficient history of customers renewing at similar percentages. Each quarter, the Company tracks renewal rates negotiated when standard product support is initially sold with a perpetual license in order to determine the SSP of standard product support within each geographic region for the upcoming quarter. If the stated standard product support fee falls within the SSP range, the specific rate in the contract will be used to estimate SSP. If the stated fee is above or below SSP, the highest or lowest end of the range, respectively, will generally be used to estimate SSP of standard product support. (iv) Premium product support, consulting services, and education services –SSP of premium product support, consulting services, and education services is established by using a bell-shaped curve approach to define a narrow range within each geographic region in which the services are discounted off of the list price on a standalone basis. The Company often provides options to purchase future products or services at a discount. The Company analyzes the option price against the previously established SSP of the goods or services to determine if the options represent material rights that should be accounted for as separate performance obligations. In general, options sold at or above SSP are not considered separate performance obligations because the customer could have received that right without entering into the contract. If a material right exists, revenue associated with the option is recognized when the future goods or services are transferred, or when the option expires. During the three and six months ended June 30, 2018 and 2017, rights arising from future purchase options have not been material.
Incremental Costs to Obtain Customer Contracts	Incremental Costs to Obtain Customer Contracts Incremental costs incurred to obtain contracts with customers include certain variable compensation (e.g., commissions and bonuses) paid to the Company’s sales team. Although the Company may bundle its goods and services into one contract, commissions are individually determined on each distinct good or service in the contract. The Company expenses as incurred those amounts earned on consulting and education services, which are generally performed within a one-year period and primarily sold on a standalone basis. The Company also expenses as incurred those amounts earned on product license sales, since the amount is earned when the license is delivered. The Company capitalizes those amounts earned on product support and amortizes the costs over a period of time that is consistent with the pattern of transfer of the product support to the customer, which the Company has determined to be a period of three years. Although the Company typically sells product support for a period of one year, a majority of customers renew their product support arrangements. Three years is generally the period after which platforms are no longer supported by the Company's support team and when customers generally choose to upgrade their software platform. The Company does not pay variable compensation on product support renewals. Variable compensation earned on subscription cloud services are expensed as incurred due to their immaterial nature. As of June 30, 2018 and December 31, 2017, capitalized costs to obtain customer contracts, net of accumulated amortization, were $4.0 million and $4.5 million, respectively, and are presented within “Deposits and other assets” in the Consolidated Balance Sheets. During the three and six months ended June 30, 2018 and 2017, amortization expense related to these capitalized costs were $0.4 million and $1.1 million, and $0.7 million and $1.4 million, respectively.
Short-term Investments	The Company periodically invests a portion of its excess cash in short-term investment instruments. Substantially all of the Company’s short-term investments are in U.S. Treasury securities, and the Company has the ability and intent to hold these investments to maturity. The stated maturity dates of these investments are between three months and one year from the purchase date. These held-to-maturity investments are recorded at amortized cost and included within “Short-term investments” on the accompanying Consolidated Balance Sheets. The fair value of held-to-maturity investments is determined based on quoted market prices in active markets for identical securities (Level 1 inputs).
Income Taxes	The Company recognizes estimated accrued interest related to unrecognized income tax benefits in the provision for income tax accounts. GAAP allows the Company to either: (i) treat taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the “period cost method”); or (ii) factor such amounts into its measurement of deferred taxes (the “deferred method”). The Company has elected the period cost method. The Tax Act allows a U.S. corporation a deduction equal to a certain percentage of its foreign-derived intangible income (“FDII”). The Company estimated the impact of the GILTI tax and FDII deduction in determining its 2018 annual effective tax rate that is reflected in its provision for income taxes for the six months ended June 30, 2018. The Company will continue to refine its calculation for the GILTI tax and FDII deduction in future quarters. The Tax Act also imposes a Transition Tax on previously untaxed accumulated and current earnings and profits (“E&P”) of certain foreign subsidiaries of the Company. In determining the Company’s provision for or benefit from income taxes, net deferred tax assets, liabilities, and valuation allowances, management is required to make judgments and estimates related to projections of domestic and foreign profitability, the timing and extent of the utilization of NOL carryforwards, applicable tax rates, transfer pricing methods, and prudent and feasible tax planning strategies. As a multinational company, the Company is required to calculate and provide for estimated income tax liabilities for each of the tax jurisdictions in which it operates. This process involves estimating current tax obligations and exposures in each jurisdiction, as well as making judgments regarding the future recoverability of deferred tax assets. Changes in the estimated level of annual pre-tax income, changes in tax laws, particularly changes related to the utilization of NOLs in various jurisdictions, and changes resulting from tax audits can all affect the overall effective income tax rate which, in turn, impacts the overall level of income tax expense or benefit and net income. Judgments and estimates related to the Company’s projections and assumptions are inherently uncertain. Therefore, actual results could differ materially from projections. The timing and manner in which the Company will use research and development tax credit carryforward tax assets, alternative minimum tax credit carryforward tax assets, and foreign tax credit carryforward tax assets in any year, or in total, may be limited by provisions of the Internal Revenue Code regarding changes in the Company’s ownership. Currently, the Company expects to use the tax assets, subject to Internal Revenue Code limitations, within the carryforward periods. Valuation allowances have been established where the Company has concluded that it is more likely than not that such deferred tax assets are not realizable. If the Company is unable to sustain profitability in future periods, it may be required to increase the valuation allowance against the deferred tax assets, which could result in a charge that would materially adversely affect net income in the period in which the charge is incurred.
Basic and Diluted Earnings per Share	Potential shares of common stock are included in the diluted earnings per share calculation when dilutive. Potential shares of common stock, consisting of common stock issuable upon exercise of outstanding stock options, are calculated using the treasury stock method.

Recent Accounting Standards (Ta

Recent Accounting Standards (Tables)	6 Months Ended
	Jun. 30, 2018
Accounting Changes And Error Corrections [Abstract]
Summary of Line Items Adjusted in Consolidated Financial Statements	The following line items as of December 31, 2017 and for the three and six months ended June 30, 2017 have been adjusted in the Consolidated Financial Statements to reflect the adoption of ASU 2014-09: December 31, 2017 Consolidated Balance Sheet As Reported (audited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Accounts receivable, net $ 69,500 $ 95,864 $ 165,364 Prepaid expenses and other current assets 18,002 1,178 19,180 Deposits and other assets 2,868 4,543 7,411 Deferred tax assets, net 13,391 (4,094 ) 9,297 Deferred revenue and advance payments 112,649 86,085 198,734 Deferred revenue and advance payments, non-current 10,181 (3,781 ) 6,400 Accumulated other comprehensive loss (5,968 ) 309 (5,659 ) Retained earnings 511,755 14,878 526,633 Three Months Ended June 30, 2017 Consolidated Statement of Operations: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Product licenses revenue $ 19,118 $ (1,390 ) $ 17,728 Sales and marketing expenses 41,419 207 41,626 Provision for income taxes 3,142 (474 ) 2,668 Net income 11,076 (1,123 ) 9,953 Diluted earnings per share 0.96 (0.10 ) 0.86 Six Months Ended June 30, 2017 Consolidated Statement of Operations: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Product licenses revenue $ 40,130 $ 244 $ 40,374 Product support revenues 141,256 22 141,278 Sales and marketing expenses 80,829 379 81,208 Provision for income taxes 6,607 320 6,927 Net income 25,943 (433 ) 25,510 Diluted earnings per share 2.24 (0.04 ) 2.20 Three Months Ended June 30, 2017 Consolidated Statement of Comprehensive Income: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Net income $ 11,076 $ (1,123 ) $ 9,953 Foreign currency translation adjustment 2,218 39 2,257 Comprehensive income 13,294 (1,084 ) 12,210 Six Months Ended June 30, 2017 Consolidated Statement of Comprehensive Income: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Net income $ 25,943 $ (433 ) $ 25,510 Foreign currency translation adjustment 3,030 275 3,305 Comprehensive income 28,943 (158 ) 28,785 Six Months Ended June 30, 2017 Consolidated Statement of Cash Flows: As Reported (unaudited) Effect of the Adoption of ASU 2014-09 (unaudited) As Adjusted (unaudited) Net income $ 25,943 $ (433 ) $ 25,510 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization 7,133 1,407 8,540 Deferred taxes (4,015 ) 361 (3,654 ) Changes in operating assets and liabilities: Prepaid expenses and other current assets (699 ) (293 ) (992 ) Deposits and other assets (274 ) (1 ) (275 ) Accrued compensation and employee benefits (9,685 ) (1,027 ) (10,712 ) Deferred revenue and advance payments 11,072 (14 ) 11,058

Contract Balances (Tables)

Contract Balances (Tables)	6 Months Ended
	Jun. 30, 2018
Contract With Customer Asset And Liability [Abstract]
Schedule of Accounts Receivable	Accounts receivable (in thousands) consisted of the following, as of: June 30, December 31, 2018 2017 (as adjusted) Billed and billable $ 129,034 $ 169,554 Less: allowance for doubtful accounts (3,919 ) (4,190 ) Accounts receivable, net $ 125,115 $ 165,364
Deferred Revenue and Advance Payments	Deferred revenue and advance payments (in thousands) from customers consisted of the following, as of: June 30, December 31, 2018 2017 (as adjusted) Current: Deferred product licenses revenue $ 1,819 $ 3,760 Deferred subscription services revenue 13,847 17,324 Deferred product support revenue 151,909 168,185 Deferred other services revenue 7,783 9,465 Total current deferred revenue and advance payments $ 175,358 $ 198,734 Non-current: Deferred product licenses revenue $ 794 $ 820 Deferred subscription services revenue 9 126 Deferred product support revenue 3,950 4,826 Deferred other services revenue 1,063 628 Total non-current deferred revenue and advance payments $ 5,816 $ 6,400

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Company's Deferred Tax Assets, Net of Deferred Tax Liabilities and Valuation Allowance	The following table summarizes the Company’s deferred tax assets, net of deferred tax liabilities and valuation allowance (in thousands), as of: June 30, December 31, 2018 2017 (as adjusted) Deferred tax assets, net of deferred tax liabilities $ 15,772 $ 10,308 Valuation allowance (1,015 ) (1,015 ) Deferred tax assets, net of deferred tax liabilities and valuation allowance $ 14,757 $ 9,293

Share-based Compensation (Table

Share-based Compensation (Tables)	6 Months Ended
	Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock Option Activity	The following table summarizes the Company’s stock option activity (in thousands, except per share data and years) for the three months ended June 30, 2018: Stock Options Outstanding Weighted Average Aggregate Weighted Average Exercise Price Intrinsic Remaining Contractual Shares Per Share Value Term (Years) Balance as of April 1, 2018 1,463 $ 140.83 Granted 103 128.27 Exercised (21 ) 121.13 $ 196 Forfeited/Expired (64 ) 163.25 Balance as of June 30, 2018 1,481 $ 139.26 Exercisable as of June 30, 2018 724 137.07 3,316 5.7 Expected to vest as of June 30, 2018 757 141.36 19 9.3 Total 1,481 $ 139.26 3,335 7.5
Schedule of Range of Exercise Prices per Share	Stock options outstanding as of June 30, 2018 are comprised of the following range of exercise prices per share (in thousands, except per share data and years): Stock Options Outstanding at June 30, 2018 Weighted Average Weighted Average Exercise Price Remaining Contractual Range of Exercise Prices per Share Shares Per Share Term (Years) $117.85 - $120.00 23 $ 118.50 5.8 $120.01 - $150.00 1,109 $ 126.92 7.9 $150.01 - $180.00 178 $ 167.68 4.9 $180.01 - $201.25 171 $ 192.39 7.9 Total 1,481 $ 139.26 7.5
Assumptions Used in Black-Scholes Pricing Model	The weighted average grant date fair value of stock option awards using the Black-Scholes pricing model was $50.76 and $72.78 for each share subject to a stock option granted during the three months ended June 30, 2018 and 2017, respectively, based on the following assumptions: Three months ended June 30, 2018 2017 Expected term of options in years 6.3 6.3 Expected volatility 34.6% - 34.9 % 37.4 % Risk-free interest rate 2.7% - 2.8 % 1.9 % Expected dividend yield 0.0 % 0.0 %

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Revenues and Long-Lived Assets, by Geographic Region	The following table presents total revenues, gross profit, and long-lived assets, excluding long-term deferred tax assets, (in thousands) according to geographic region: Geographic regions: Domestic EMEA Other Regions Consolidated Three months ended June 30, 2018 Total revenues $ 68,025 $ 38,008 $ 14,569 $ 120,602 Gross profit $ 53,239 $ 30,246 $ 12,077 $ 95,562 Three months ended June 30, 2017 (as adjusted) Total revenues $ 73,238 $ 34,024 $ 11,958 $ 119,220 Gross profit $ 58,107 $ 27,023 $ 9,715 $ 94,845 Six months ended June 30, 2018 Total revenues $ 140,104 $ 76,206 $ 27,259 $ 243,569 Gross profit $ 110,290 $ 60,761 $ 22,293 $ 193,344 Six months ended June 30, 2017 (as adjusted) Total revenues $ 148,802 $ 67,752 $ 24,898 $ 241,452 Gross profit $ 119,162 $ 54,229 $ 20,554 $ 193,945 As of June 30, 2018 Long-lived assets $ 50,722 $ 5,595 $ 2,713 $ 59,030 As of December 31, 2017 (as adjusted) Long-lived assets $ 55,355 $ 5,626 $ 2,288 $ 63,269

Summary of Significant Accoun23

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Accounting Policies [Abstract]
Payment terms			The Company’s standard payment terms are generally within 180 days of invoicing. If extended payment terms are granted to customers, those terms generally do not exceed one year.
Description of warranty			The standard software assurance warranty period is generally less than one year.
Amortization period for capitalized contract costs	3 years		3 years
Product support period			1 year
Capitalized cost to obtain customer contracts net	$ 4		$ 4		$ 4.5
Amortization expenses related to capitalized cost	$ 0.4	$ 0.7	$ 1.1	$ 1.4

Recent Accounting Standards - A

Recent Accounting Standards - Additional Information (Detail) - USD ($)	Jun. 30, 2018	Jan. 01, 2018	Jan. 01, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Capitalized cost amortization period	3 years
ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Capitalized cost amortization period	3 years
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings			$ 13,000,000
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Deferred Revenue
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings			(12,900,000)
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Deferred Tax Assets Net of Deferred Tax Liabilities
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings			5,200,000
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Other Non-current Assets
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings			(4,400,000)
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Other Current Assets
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings			$ (900,000)
Accounting Standards Update No. 2016-16
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings		$ 0

Recent Accounting Standards - L

Recent Accounting Standards - Line Items Adjusted in Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts receivable, net	$ 125,115	$ 165,364
Prepaid expenses and other current assets	27,863	19,180
Deposits and other assets	7,112	7,411
Deferred tax assets, net	14,761	9,297
Deferred revenue and advance payments	175,358	198,734
Deferred revenue and advance payments, non-current	5,816	6,400
Accumulated other comprehensive loss	(8,111)	(5,659)
Retained earnings	$ 533,134	526,633
As Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts receivable, net		69,500
Prepaid expenses and other current assets		18,002
Deposits and other assets		2,868
Deferred tax assets, net		13,391
Deferred revenue and advance payments		112,649
Deferred revenue and advance payments, non-current		10,181
Accumulated other comprehensive loss		(5,968)
Retained earnings		511,755
Effect of the Adoption | ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts receivable, net		95,864
Prepaid expenses and other current assets		1,178
Deposits and other assets		4,543
Deferred tax assets, net		(4,094)
Deferred revenue and advance payments		86,085
Deferred revenue and advance payments, non-current		(3,781)
Accumulated other comprehensive loss		309
Retained earnings		$ 14,878

Recent Accounting Standards -26

Recent Accounting Standards - Line Items Adjusted in Consolidated Statement of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenues		$ 120,602	$ 119,220	$ 243,569	$ 241,452
Sales and marketing expenses		50,978	41,626	102,313	81,208
Provision for income taxes		1,059	2,668	541	6,927
Net income		$ 4,828	$ 9,953	$ 6,501	$ 25,510
Diluted earnings per share	[1]	$ 0.42	$ 0.86	$ 0.57	$ 2.20
Product licenses
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenues		$ 19,292	$ 17,728	$ 36,593	$ 40,374
Product support
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenues		$ 73,676	70,766	$ 148,091	141,278
As Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Sales and marketing expenses			41,419		80,829
Provision for income taxes			3,142		6,607
Net income			$ 11,076		$ 25,943
Diluted earnings per share			$ 0.96		$ 2.24
As Reported | Product licenses
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenues			$ 19,118		$ 40,130
As Reported | Product support
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenues					141,256
Effect of the Adoption | ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Sales and marketing expenses			207		379
Provision for income taxes			(474)		320
Net income			$ (1,123)		$ (433)
Diluted earnings per share			$ (0.10)		$ (0.04)
Effect of the Adoption | Product licenses | ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenues			$ (1,390)		$ 244
Effect of the Adoption | Product support | ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenues					$ 22
[1]	Basic and fully diluted earnings per share for class A and class B common stock are the same.

Recent Accounting Standards -27

Recent Accounting Standards - Line Items Adjusted in Consolidated Statement of Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net income	$ 4,828	$ 9,953	$ 6,501	$ 25,510
Foreign currency translation adjustment	(3,892)	2,257	(2,452)	3,305
Comprehensive income	$ 936	12,210	$ 4,049	28,785
As Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net income		11,076		25,943
Foreign currency translation adjustment		2,218		3,030
Comprehensive income		13,294		28,943
Effect of the Adoption | ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net income		(1,123)		(433)
Foreign currency translation adjustment		39		275
Comprehensive income		$ (1,084)		$ (158)

Recent Accounting Standards -28

Recent Accounting Standards - Line Items Adjusted in Consolidated Statement of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net income	$ 4,828	$ 9,953	$ 6,501	$ 25,510
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			3,870	8,540
Deferred taxes			(5,758)	(3,654)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets			453	(992)
Deposits and other assets			(344)	(275)
Accrued compensation and employee benefits			(3,015)	(10,712)
Deferred revenue and advance payments			$ 10,502	11,058
As Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net income		11,076		25,943
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization				7,133
Deferred taxes				(4,015)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets				(699)
Deposits and other assets				(274)
Accrued compensation and employee benefits				(9,685)
Deferred revenue and advance payments				11,072
Effect of the Adoption | ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net income		$ (1,123)		(433)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization				1,407
Deferred taxes				361
Changes in operating assets and liabilities:
Prepaid expenses and other current assets				(293)
Deposits and other assets				(1)
Accrued compensation and employee benefits				(1,027)
Deferred revenue and advance payments				$ (14)

Short-term Investments - Additi

Short-term Investments - Additional Information (Detail) - US Treasury Securities and Certificates of Deposit - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Investment [Line Items]
Held to maturity securities, amortized cost	$ 609,200,000	$ 254,900,000
Held to maturity securities, carrying value	609,200,000	254,900,000
Held to maturity securities, fair value	608,600,000	254,800,000
Other-than-temporary impairments related to these investments	$ 0	$ 0
Minimum
Investment [Line Items]
Held to maturity securities maturity range	3 months
Maximum
Investment [Line Items]
Held to maturity securities maturity range	1 year

Schedule of Accounts Receivable

Schedule of Accounts Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Billed and billable	$ 129,034	$ 169,554
Less: allowance for doubtful accounts	(3,919)	(4,190)
Accounts receivable, net	$ 125,115	$ 165,364

Contract Balances - Additional

Contract Balances - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Contract With Customer Asset And Liability [Line Items]
Bad debt expense	$ 800,000	$ 800,000	$ 948,000	$ 1,835,000
Prepaid Expenses and Other Current Assets
Contract With Customer Asset And Liability [Line Items]
Assets impairment charges	0	0	0	0
Contract assets	500,000		500,000		$ 1,200,000
Current Deferred Revenue and Advanced Payments
Contract With Customer Asset And Liability [Line Items]
Revenue recognized from beginning deferred revenue	$ 56,800,000	$ 55,700,000	$ 131,300,000	$ 130,500,000

Deferred Revenue and Advance Pa

Deferred Revenue and Advance Payments (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Deferred Revenue Disclosure [Abstract]
Deferred product licenses revenue, Current	$ 1,819	$ 3,760
Deferred subscription services revenue, Current	13,847	17,324
Deferred product support revenue, Current	151,909	168,185
Deferred other services revenue, Current	7,783	9,465
Total current deferred revenue and advance payments	175,358	198,734
Deferred product licenses revenue, Non-current	794	820
Deferred subscription services revenue, Non-current	9	126
Deferred product support revenue, Non-current	3,950	4,826
Deferred other services revenue, Non-current	1,063	628
Total non-current deferred revenue and advance payments	$ 5,816	$ 6,400

Contract Balances - Additiona33

Contract Balances - Additional Information (Detail1) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2018-07-01
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligation	$ 175.4
Revenue, Remaining performance obligations, Expected timing of satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-07-01
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligation	$ 5.8
Revenue, Remaining performance obligations, Thereafter	thereafter
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: (nil)
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligation	$ 181.2
Revenue, Remaining performance obligations, Expected timing of satisfaction, Period

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	1 Months Ended
	Jan. 31, 2018	Jun. 30, 2018USD ($)ft²	Dec. 31, 2017USD ($)
Commitments and Contingencies [Line Items]
Transition tax			$ 40.3
Other Long-term Liabilities
Commitments and Contingencies [Line Items]
Transition tax		$ 32.5	36.8
Northern Virginia Office Space
Commitments and Contingencies [Line Items]
Office space area leased under the agreement | ft²		214,000
Lease expiration date	2030-12
Northern Virginia Office Space | Other Long-term Liabilities
Commitments and Contingencies [Line Items]
Deferred rent included in other long-term liabilities		$ 27.3	$ 8.5

Treasury Stock - Additional Inf

Treasury Stock - Additional Information (Detail) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Equity, Class of Treasury Stock [Line Items]
Treasury stock, shares	6,405,000			6,405,000		6,405,000
Treasury stock, cost	$ 475,184,000			$ 475,184,000		$ 475,184,000
Class A | 2005 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Shares repurchased program expiration date		Apr. 29, 2018
Stock authorized to repurchase by board of directors	$ 800,000,000			$ 800,000,000
Treasury stock, shares	3,826,947			3,826,947
Treasury stock, shares repurchased	0		0	0	0
Shares repurchased, average price per share				$ 90.23
Treasury stock, cost	$ 345,300,000			$ 345,300,000
Class A | 2005 Share Repurchase Program | Board of Directors
Equity, Class of Treasury Stock [Line Items]
Shares repurchased program expiration date				Apr. 29, 2023

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Taxes
Unrecognized tax benefits	$ 4,100		$ 4,100
Unrecognized tax benefits would impact the effective tax rate	3,600		3,600
Interest accrued	700		$ 700
Effective tax rate from operations			7.70%	21.40%
(Benefit from) provision for income taxes	1,059	$ 2,668	$ 541	$ 6,927
Effective U.S corporate tax rate			21.00%		35.00%
Transition tax					$ 40,300
Other Long-term Liabilities
Income Taxes
Transition tax	32,500		$ 32,500		36,800
U.S
Income Taxes
Cash and cash equivalents and short-term investments	300,100		$ 300,100		293,800
U.S | Earliest Tax Year
Income Taxes
Tax years subject to examination			2,014
Germany | Earliest Tax Year
Income Taxes
Tax years subject to examination			2,016
Poland | Earliest Tax Year
Income Taxes
Tax years subject to examination			2,013
China | Earliest Tax Year
Income Taxes
Tax years subject to examination			2,013
Spain | Earliest Tax Year
Income Taxes
Tax years subject to examination			2,014
United Kingdom | Earliest Tax Year
Income Taxes
Tax years subject to examination			2,016
Foreign
Income Taxes
Cash and cash equivalents and short-term investments	$ 399,500		$ 399,500		$ 381,400

Company's Deferred Tax Assets,

Company's Deferred Tax Assets, Net of Deferred Tax Liabilities and Valuation Allowance (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred tax assets, net of deferred tax liabilities	$ 15,772	$ 10,308
Valuation allowance	(1,015)	(1,015)
Deferred tax assets, net of deferred tax liabilities and valuation allowance	$ 14,757	$ 9,293

Share-based Compensation - Addi

Share-based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Apr. 30, 2018	Mar. 31, 2018
Stock Option Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards granted	103,000
Options outstanding, shares	1,481,000		1,481,000			1,463,000
2013 Equity Plan | Stock Option Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vested	157,500
Aggregate fair value of stock option vested	$ 8,900,000
Weighted average grant date fair value of stock option awards	$ 50.76	$ 72.78
Share-based compensation expense recognized	$ 3,400,000	$ 3,800,000	$ 8,100,000	$ 6,900,000
Unrecognized share-based compensation expense	37,600,000		$ 37,600,000
Unrecognized compensation expense expected to be recognized			3 years 3 months 18 days
2013 Equity Plan | Other Stock-based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense recognized	$ 0		$ 0
Unrecognized compensation expense expected to be recognized			3 years 10 months 24 days
Vesting period	4 years
Unrecognized share-based compensation expense	$ 500,000		$ 500,000
2013 Equity Plan | Class A | Other Stock-based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other stock-based awards granted	10,000
Other stock-based awards granted weighted average exercise price per award	$ 129.90
2013 Equity Plan | Class A | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, stock authorized	2,300,000		2,300,000		1,700,000
2013 Equity Plan | Class A | Employees, Officers, and Directors | Stock Option Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of class A common stock reserved and available for future issuance	565,000		565,000
Stock option awards granted	102,500
Options outstanding, shares	1,481,233		1,481,233

Summary of Stock Option Activit

Summary of Stock Option Activity (Detail) - Stock Option Awards $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2018USD ($)$ / sharesshares
Options outstanding, shares
Beginning Balance | shares	1,463
Granted | shares	103
Exercised | shares	(21)
Forfeited/Expired | shares	(64)
Ending Balance | shares	1,481
Exercisable as of June 30, 2018 | shares	724
Expected to vest as of June 30, 2018 | shares	757
Total | shares	1,481
Weighted Average Exercise Price Per Share
Beginning Balance | $ / shares	$ 140.83
Granted | $ / shares	128.27
Exercised | $ / shares	121.13
Forfeited/Expired | $ / shares	163.25
Ending Balance | $ / shares	139.26
Exercisable as of June 30, 2018 | $ / shares	137.07
Expected to vest as of June 30, 2018 | $ / shares	141.36
Total | $ / shares	$ 139.26
Aggregate Intrinsic Value
Exercised | $	$ 196
Exercisable as of June 30, 2018 | $	3,316
Expected to vest as of June 30, 2018 | $	19
Total | $	$ 3,335
Weighted Average Remaining Contractual Term (Years)
Exercisable as of June 30, 2018	5 years 8 months 12 days
Expected to vest as of June 30, 2018	9 years 3 months 18 days
Total	7 years 6 months

Schedule of Range of Exercise P

Schedule of Range of Exercise Prices per Share (Detail) - Stock Option Awards shares in Thousands	6 Months Ended
	Jun. 30, 2018$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares, Stock Options Outstanding | shares	1,481
Weighted Average Exercise Price Per Share, Stock Options Outstanding	$ 139.26
Weighted Average Remaining Contractual Term (Years), Stock Options Outstanding	7 years 6 months
117.85 - 120.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices per Share, minimum	$ 117.85
Range of Exercise Prices per Share, maximum	$ 120
Shares, Stock Options Outstanding | shares	23
Weighted Average Exercise Price Per Share, Stock Options Outstanding	$ 118.50
Weighted Average Remaining Contractual Term (Years), Stock Options Outstanding	5 years 9 months 18 days
120.01 - 150.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices per Share, minimum	$ 120.01
Range of Exercise Prices per Share, maximum	$ 150
Shares, Stock Options Outstanding | shares	1,109
Weighted Average Exercise Price Per Share, Stock Options Outstanding	$ 126.92
Weighted Average Remaining Contractual Term (Years), Stock Options Outstanding	7 years 10 months 24 days
150.01 - 180.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices per Share, minimum	$ 150.01
Range of Exercise Prices per Share, maximum	$ 180
Shares, Stock Options Outstanding | shares	178
Weighted Average Exercise Price Per Share, Stock Options Outstanding	$ 167.68
Weighted Average Remaining Contractual Term (Years), Stock Options Outstanding	4 years 10 months 24 days
180.01 - 201.25
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices per Share, minimum	$ 180.01
Range of Exercise Prices per Share, maximum	$ 201.25
Shares, Stock Options Outstanding | shares	171
Weighted Average Exercise Price Per Share, Stock Options Outstanding	$ 192.39
Weighted Average Remaining Contractual Term (Years), Stock Options Outstanding	7 years 10 months 24 days

Assumptions Used in Black-Schol

Assumptions Used in Black-Scholes Pricing Model (Detail) - Stock Option Awards	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term of options in years	6 years 3 months 18 days	6 years 3 months 18 days
Expected volatility		37.40%
Expected volatility, minimum	34.60%
Expected volatility, maximum	34.90%
Risk-free interest rate		1.90%
Risk-free interest rate, minimum	2.70%
Risk-free interest rate, maximum	2.80%
Expected dividend yield	0.00%	0.00%

Common Equity and Earnings pe42

Common Equity and Earnings per Share - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Class of Stock
Payments of dividends, common stock			$ 0		$ 0
Preferred stock, shares issued	0		0		0
Preferred stock, shares outstanding	0		0		0
Class A
Class of Stock
Common stock, votes per share			one
Class A | 2013 Plan
Class of Stock
Shares issuable under stock options excluded from calculation of diluted earnings per share	938,000	401,000	830,000	373,000
Class B Convertible
Class of Stock
Common stock, votes per share			ten

Segment Information - Additiona

Segment Information - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2018CountryCustomer	Jun. 30, 2017CountryCustomer	Jun. 30, 2018SegmentCountryCustomer	Jun. 30, 2017CountryCustomer	Dec. 31, 2017Country
Segment Reporting Information
Number of operating segments | Segment			1
Geographic Concentration Risk
Segment Reporting Information
Number Of Individual Country accounted for 10% or more of total revenues	0	0	0	0
Number Of Individual country accounted for 10% or more of total consolidated assets	0		0		0
Customer Concentration Risk | Sales Revenue, Goods, Net
Segment Reporting Information
Number Of Individual Customer accounted for 10% or more of total consolidated revenues | Customer	0	0	0	0

Total Revenues Gross Profit and

Total Revenues Gross Profit and Long Lived Assets Excluding Long Term Deferred Tax Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets
Total revenues	$ 120,602	$ 119,220	$ 243,569	$ 241,452
Gross profit	95,562	94,845	193,344	193,945
Long-lived assets	59,030		59,030		$ 63,269
Domestic
Revenues from External Customers and Long-Lived Assets
Total revenues	68,025	73,238	140,104	148,802
Gross profit	53,239	58,107	110,290	119,162
Long-lived assets	50,722		50,722		55,355
EMEA
Revenues from External Customers and Long-Lived Assets
Total revenues	38,008	34,024	76,206	67,752
Gross profit	30,246	27,023	60,761	54,229
Long-lived assets	5,595		5,595		5,626
Other Regions
Revenues from External Customers and Long-Lived Assets
Total revenues	14,569	11,958	27,259	24,898
Gross profit	12,077	$ 9,715	22,293	$ 20,554
Long-lived assets	$ 2,713		$ 2,713		$ 2,288