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Business Acquisitions (Purchase Price Allocation) (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Apr. 02, 2018 | Jul. 03, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  | $ 64,489 | $ 52,990 | $ 0
Net cash consideration |  |  | $ 5,794 | $ 80,234 | $ 0
Archway |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash |  | $ 1,401 |  |  |
Goodwill |  | 52,990 |  |  |
Current assets, net |  | 2,539 |  |  |
Property and equipment |  | 776 |  |  |
Contingent consideration |  | (4,800) |  |  |
Net cash consideration |  | 80,234 |  |  |
Total purchase price allocation |  | 81,635 |  |  |
Archway | Acquired technology |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Identifiable intangible assets |  | $ 13,510 |  |  |
Weighted average useful life of acquired intangible assets |  | 10 years |  |  |
Archway | Client relationships |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Identifiable intangible assets |  | $ 10,760 |  |  |
Weighted average useful life of acquired intangible assets |  | 15 years |  |  |
Archway | Non-competition agreements |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Identifiable intangible assets |  | $ 3,470 |  |  |
Weighted average useful life of acquired intangible assets |  | 5 years |  |  |
Archway | Trade names |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Identifiable intangible assets |  | $ 2,390 |  |  |
Weighted average useful life of acquired intangible assets |  | 7 years |  |  |
Huntington Steele, LLC |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash | $ 125 |  |  |  |
Goodwill | 11,499 |  |  |  |
Other assets | 15 |  |  |  |
Current liabilities | (230) |  |  |  |
Contingent consideration | (12,120) |  |  |  |
Net cash consideration | 5,794 |  |  |  |
Huntington Steele, LLC | Client relationships |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Identifiable intangible assets | $ 6,180 |  |  |  |
Weighted average useful life of acquired intangible assets | 12 years |  |  |  |
Huntington Steele, LLC | Trade names |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Identifiable intangible assets | $ 450 |  |  |  |
Weighted average useful life of acquired intangible assets | 7 years |  |  |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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