Nature of Operations, Background, and Basis of Presentation (Policies)	6 Months Ended
Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassifications	Reclassifications Certain reclassifications have been made to prior year financial statements to conform to classifications used in the current year. These reclassifications had no impact on net income, stockholders’ equity, or cash flows as previously reported.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements The Company adopted ASU 2016-02 effective January 1, 2019, by applying the new guidance under the additional and alternative transition method allowed by ASU 2018-11, “Leases (Topic 842): Targeted Improvements”. The standard had a material impact on the Company’s unaudited condensed consolidated balance sheet but did not have an impact on the Company’s unaudited condensed consolidated statement of operations. As of January 1, 2019, the adoption resulted in the recognition of operating lease right-of-use ("ROU") assets of approximately $10.4 million, lease liabilities of approximately $13.2 million, and a decrease of approximately $2.8 million in accrued rent. The Company elected the available practical expedients under ASC 842-10-15-37 (thereby not separating lease components from non-lease components and instead accounting for all components as a single lease component) and ASC 842-10-65-1 (thereby, among other things, not reassessing lease classification), and implemented changes to its processes and methodologies related to leases to enable the preparation of financial information on adoption and to allow for the correct identification, classification, and measurement of leases in accordance with the new guidance going forward. The adoption of the standard related to leases had no impact on cash from or used in operating, financing, or investing activities in the Company's unaudited condensed consolidated statements of cash flows. The Company determines if an arrangement is a lease at inception. Operating leases are included in ROU assets and operating lease liabilities (current and non-current) in the Company’s unaudited condensed consolidated balance sheets. ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease ROU assets and lease liabilities are recognized at commencement date based on the present value of the remaining lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The Company may use the implicit rate when readily determinable. Operating lease ROU assets also include scheduled lease payments made and initial direct costs, and exclude lease incentives and accrued rent. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for operating lease payments is recognized on a straight-line basis over the lease term. For real estate leases of office space, the Company accounts for the lease and non-lease components as a single lease component. Variable lease payments that do not depend on an index or rate (such as real estate taxes and building insurance and lessee’s shares thereof), if any, are excluded from lease payments at lease commencement date for initial measurement. Subsequent to initial measurement, these variable payments are recognized when the event determining the amount of variable consideration to be paid occurs. For leases with a term of 12 months or less, the Company does not recognize lease liabilities and ROU assets, but recognizes the lease payments in net income on a straight-line basis over the respective lease terms. The Company recognizes income from subleases (in which the Company is the sublessor) on a straight-line basis over the term of the sublease, as a reduction to lease expense.

Recently Adopted Accounting Pronouncements

The Company adopted ASU 2016-02 effective January 1, 2019, by applying the new guidance under the additional and alternative transition method allowed by ASU 2018-11, “Leases (Topic 842): Targeted Improvements”. The standard had a material impact on the Company’s unaudited condensed consolidated balance sheet but did not have an impact on the Company’s unaudited condensed consolidated statement of operations. As of January 1, 2019, the adoption resulted in the recognition of operating lease right-of-use ("ROU") assets of approximately $10.4 million, lease liabilities of approximately $13.2 million, and a decrease of approximately $2.8 million in accrued rent.

The Company elected the available practical expedients under ASC 842-10-15-37 (thereby not separating lease components from non-lease components and instead accounting for all components as a single lease component) and ASC 842-10-65-1 (thereby, among other things, not reassessing lease classification), and implemented changes to its processes and methodologies related to leases to enable the preparation of financial information on adoption and to allow for the correct identification, classification, and measurement of leases in accordance with the new guidance going forward.

The adoption of the standard related to leases had no impact on cash from or used in operating, financing, or investing activities in the Company's unaudited condensed consolidated statements of cash flows.

The Company determines if an arrangement is a lease at inception. Operating leases are included in ROU assets and operating lease liabilities (current and non-current) in the Company’s unaudited condensed consolidated balance sheets.

ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease ROU assets and lease liabilities are recognized at commencement date based on the present value of the remaining lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The Company may use the implicit rate when readily determinable. Operating lease ROU assets also include scheduled lease payments made and initial direct costs, and exclude lease incentives and accrued rent. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for operating lease payments is recognized on a straight-line basis over the lease term.

For real estate leases of office space, the Company accounts for the lease and non-lease components as a single lease component.

Variable lease payments that do not depend on an index or rate (such as real estate taxes and building insurance and lessee’s shares thereof), if any, are excluded from lease payments at lease commencement date for initial measurement. Subsequent to initial measurement, these variable payments are recognized when the event determining the amount of variable consideration to be paid occurs.

For leases with a term of 12 months or less, the Company does not recognize lease liabilities and ROU assets, but recognizes the lease payments in net income on a straight-line basis over the respective lease terms.

The Company recognizes income from subleases (in which the Company is the sublessor) on a straight-line basis over the term of the sublease, as a reduction to lease expense.