Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 44,947	$ 6,307
Accounts receivable, net	109,764	112,194
Prepaid expenses	4,303	4,470
Other current assets	2,212	6,237
Total current assets	161,226	129,208
Property and equipment, net	6,565	7,145
Goodwill	321,995	305,238
Intangible assets, net	49,821	51,066
Other non-current assets	9,662	6,403
Total assets	549,269	499,060
Current liabilities:
Accounts payable	10,801	23,196
Other current liabilities	44,172	38,077
Total current liabilities	54,973	61,273
Long-term debt, net	119,038	55,000
Other non-current liabilities	20,254	16,436
Total liabilities	194,265	132,709
STOCKHOLDERS' EQUITY ATTRIBUTABLE TO PARENT
Common stock (par value $.001 per share; 100,000,000 authorized; 47,999,384 shares issued and 31,920,534 shares outstanding as of September 30, 2018; 47,370,945 shares issued and 33,249,665 shares outstanding as of December 31, 2017)	48	47
Additional paid-in capital	431,510	403,906
Accumulated other comprehensive loss	(2,837)	(1,822)
Treasury stock, at cost (16,078,850 shares as of September 30, 2018; 14,121,280 shares as of December 31, 2017)	(218,891)	(163,871)
Retained earnings	145,174	128,091
Total stockholders’ equity	355,004	366,351
Total liabilities and stockholders’ equity	$ 549,269	$ 499,060