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Business Acquisition (Details) - USD ($) $ in Thousands		3 Months Ended
	Apr. 02, 2018	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Amortization expense		$ 921	$ 776
Huntington Steele, LLC
Business Acquisition [Line Items]
Total purchase price	$ 17,914
Net cash consideration	5,794
Cash acquired from acquisition	125
Contingent purchase price	12,120
Accrued liabilities | Huntington Steele, LLC
Business Acquisition [Line Items]
Contingent purchase price, current	968
Other long-term liabilities | Huntington Steele, LLC
Business Acquisition [Line Items]
Contingent purchase price, noncurrent	$ 11,152

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- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability, Current

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability, Noncurrent

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The amount of liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date.

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The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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