Contract Assets and Liabilities	6 Months Ended
Jun. 30, 2019
Revenue From Contract With Customer [Abstract]
Contract Assets and Liabilities	Note 8 – Contract Assets and Liabilities Accounts Receivable Accounts receivable includes amounts billed and currently due from customers. Since the only condition for payment of our invoices is the passage of time, the Company records a receivable on the date the invoice is issued. Also included in accounts receivable are unbilled amounts resulting from revenue exceeding the amount billed to the customer, where the right to payment is unconditional. If the right to payment for services performed was conditional on something other than the passage of time, the unbilled amount would be recorded as a separate contract asset. There were no contract assets as of June 30, 2019 or 2018. The majority of the Company’s contracts are non-cancellable. However, for contracts that are cancellable by the customer, the Company does not record a receivable when it issues an invoice. The Company records accounts receivable on these contracts only up to the amount of revenue earned but not yet collected. In addition, since the majority of the Company’s contracts are for a duration of one year and payment is expected within one year from the transfer of products and services, the Company does not adjust its receivables or transaction price for the effects of a significant financing component. Deferred Revenue The Company refers to contract liabilities as deferred revenue on the Consolidated Balance Sheets. Payment terms in the Company’s customer contracts vary, but generally require payment in advance of fully satisfying the performance obligation(s). Deferred revenue consists of billings in excess of revenue recognized. Similar to accounts receivable, the Company does not record deferred revenue for invoices issued on a cancellable contract. During the three and six months ended June 30, 2019, the Company recognized approximately $53.5 million and $111.6 million of revenue related to its deferred revenue balance at January 1, 2019. During the three and six months ended June 30, 2018, the Company recognized approximately $45.9 million and $103.9 million of revenue related to its deferred revenue balance at January 1, 2018. To determine revenue recognized in the current period from deferred revenue at the beginning of the period, the Company first allocates revenue to the individual deferred revenue balance outstanding at the beginning of the period, until the revenue equals that balance. Approximately $325.0 million of revenue is expected to be recognized during the next 12 to 24 months from remaining performance obligations as of June 30, 2019. Cost to Obtain Contracts The Company capitalizes commissions paid to internal sales representatives and related fringe benefits costs that are incremental to obtaining customer contracts. These costs are included in deferred commissions on the Consolidated Balance Sheets. The Company accounts for these costs at a portfolio level as the Company’s contracts are similar in nature and the amortization model used closely matches the amortization expense that would be recognized on a contract-by-contract basis. Costs to obtain a contract are amortized to operations as the related revenue is recognized over the initial contract term. Amortization expense related to deferred commissions was $8.9 million and $16.0 million for the three and six months ended June 30, 2019, respectively. Amortization expense related to deferred commissions was $8.2 million and $15.2 million for the three and six months ended June 30, 2018, respectively. The Company evaluates the recoverability of deferred commissions at each balance sheet date.

Contract Assets and Liabilities

6 Months Ended

Jun. 30, 2019

Revenue From Contract With Customer [Abstract]

Note 8 – Contract Assets and Liabilities

Accounts Receivable

Accounts receivable includes amounts billed and currently due from customers. Since the only condition for payment of our invoices is the passage of time, the Company records a receivable on the date the invoice is issued. Also included in accounts receivable are unbilled amounts resulting from revenue exceeding the amount billed to the customer, where the right to payment is unconditional. If the right to payment for services performed was conditional on something other than the passage of time, the unbilled amount would be recorded as a separate contract asset. There were no contract assets as of June 30, 2019 or 2018.

The majority of the Company’s contracts are non-cancellable. However, for contracts that are cancellable by the customer, the Company does not record a receivable when it issues an invoice. The Company records accounts receivable on these contracts only up to the amount of revenue earned but not yet collected.

In addition, since the majority of the Company’s contracts are for a duration of one year and payment is expected within one year from the transfer of products and services, the Company does not adjust its receivables or transaction price for the effects of a significant financing component.

Deferred Revenue

The Company refers to contract liabilities as deferred revenue on the Consolidated Balance Sheets. Payment terms in the Company’s customer contracts vary, but generally require payment in advance of fully satisfying the performance obligation(s). Deferred revenue consists of billings in excess of revenue recognized. Similar to accounts receivable, the Company does not record deferred revenue for invoices issued on a cancellable contract.

During the three and six months ended June 30, 2019, the Company recognized approximately $53.5 million and $111.6 million of revenue related to its deferred revenue balance at January 1, 2019. During the three and six months ended June 30, 2018, the Company recognized approximately $45.9 million and $103.9 million of revenue related to its deferred revenue balance at January 1, 2018. To determine revenue recognized in the current period from deferred revenue at the beginning of the period, the Company first allocates revenue to the individual deferred revenue balance outstanding at the beginning of the period, until the revenue equals that balance.

Approximately $325.0 million of revenue is expected to be recognized during the next 12 to 24 months from remaining performance obligations as of June 30, 2019.

Cost to Obtain Contracts

The Company capitalizes commissions paid to internal sales representatives and related fringe benefits costs that are incremental to obtaining customer contracts. These costs are included in deferred commissions on the Consolidated Balance Sheets. The Company accounts for these costs at a portfolio level as the Company’s contracts are similar in nature and the amortization model used closely matches the amortization expense that would be recognized on a contract-by-contract basis. Costs to obtain a contract are amortized to operations as the related revenue is recognized over the initial contract term. Amortization expense related to deferred commissions was $8.9 million and $16.0 million for the three and six months ended June 30, 2019, respectively. Amortization expense related to deferred commissions was $8.2 million and $15.2 million for the three and six months ended June 30, 2018, respectively. The Company evaluates the recoverability of deferred commissions at each balance sheet date.