Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 9,463	$ 14,850
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Asset impairment		237
Depreciation and amortization expense	7,786	11,771
Bad debt expense	15,112	14,769
Compensation expense related to share-based awards	2,326	1,391
Gain on disposition of property and equipment		(238)
Deferred income taxes	8,744
Changes in operating assets and liabilities	(77,677)	(36,213)
Net cash (used in) provided by operating activities	(34,246)	6,567
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale investments	(145,088)	(93,689)
Sales of available-for-sale investments	169,480	58,330
Purchases of property and equipment	(2,146)	(1,970)
Proceeds on the sale of assets		3,400
Payments of cash upon sale of businesses		(62)
Net cash provided by (used in) investing activities	22,246	(33,991)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock	2,459	278
Payment on borrowings		(38,000)
Payments of employee tax associated with stock compensation	(1,101)	(520)
Net cash provided by (used in) financing activities	1,358	(38,242)
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS:	33	(36)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(10,609)	(65,702)
CASH AND CASH EQUIVALENTS, beginning of the period	50,882	116,740
CASH AND CASH EQUIVALENTS, end of the period	$ 40,273	$ 51,038