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Share held by related party.

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(a))
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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.

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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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Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) office	Jan. 01, 2018 USD ($)
Related Party Transaction
Accounts payable	$ (14,817)	$ (19,105)
Decrease in deferred tax asset	(1,437)	(1,516)
Deferred revenue	931	$ 825
Deferred revenue,revenue recognized in period	$ 447
Majority Shareholder
Related Party Transaction
Percent of outstanding shares held by related party	57.50%
Minimum
Related Party Transaction
Number of offices \| office		25
Accounting Standards Update 2014-09 \| Difference between Revenue Guidance in Effect before and after Topic 606
Related Party Transaction
Accounts payable			$ 1,600
Decrease in deferred tax asset			270
Accounting Standards Update 2014-09 \| Difference between Revenue Guidance in Effect before and after Topic 606 \| Retained Earnings
Related Party Transaction
Cumulative adjustment			$ 1,300