Supplemental Consolidated Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Components of Accounts Receivable, Net and Contract Assets

	March 31,			December 31,
	2019			2018
Billed amounts	$	108,125		$	116,190
Engagements in process and contract assets		89,512			74,633
Allowance for uncollectible billed amounts		(8,022	)		(7,815	)
Allowance for uncollectible engagements in process		(3,092	)		(3,085	)
Accounts receivable, net and contract assets	$	186,523		$	179,923

Components of Prepaid Expenses and Other Current Assets

	March 31,		December 31,
	2019		2018
Prepaid recruiting and retention incentives - current	$	5,387	$	4,552
Other current prepaid expenses and other current assets		21,448		17,960
Prepaid expenses and other current assets	$	26,835	$	22,512

Components of Other Assets

	March 31,		December 31,
	2019		2018
Prepaid recruiting and retention incentives - non-current	$	3,070	$	2,654
Other prepaid expenses and other non-current assets		5,633		5,990
Other assets	$	8,703	$	8,644

Property and Equipment, Net

	March 31,			December 31,
	2019			2018
Furniture, fixtures and equipment	$	56,944		$	55,619
Software		87,821			86,225
Leasehold improvements		47,114			47,097
Property and equipment, at cost		191,879			188,941
Less: accumulated depreciation and amortization		(130,505	)		(125,916	)
Property and equipment, net	$	61,374		$	63,025

Components of Other Current Liabilities

	March 31,		December 31,
	2019		2018
Deferred acquisition liabilities - current	$	978	$	969
Contract liabilities		21,301		28,909
Deferred rent - current		-		2,656
Other current liabilities		482		1,510
Total other current liabilities	$	22,761	$	34,044

Components of Other Non-Current Liabilities

	March 31,		December 31,
	2019		2018
Deferred acquisition liabilities - non-current	$	733	$	710
Deferred rent - non-current		-		21,648
Other non-current liabilities		3,588		2,919
Total other non-current liabilities	$	4,321	$	25,277