Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 5,177	$ 3,011
Adjustments to reconcile net income to net cash used in operating activities:
Asset impairment		237
Depreciation and amortization expense	3,910	6,569
Bad debt expense	8,224	9,552
Compensation expense related to share-based awards	1,111	544
Deferred income taxes	3,792
Changes in operating assets and liabilities	(61,267)	(30,105)
Net cash used in operating activities	(39,053)	(10,192)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale investments	(39,992)	(36,004)
Sales of available-for-sale investments	44,316	28,189
Purchases of property and equipment	(735)	(876)
Payments of cash upon sale of businesses		(62)
Net cash provided by (used in) investing activities	3,589	(8,753)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock	138	147
Payment on borrowings		(38,000)
Payments of employee tax associated with stock compensation	(928)	(418)
Net cash used in financing activities	(790)	(38,271)
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS:	15	(253)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(36,239)	(57,469)
CASH AND CASH EQUIVALENTS, beginning of the period	50,882	116,740
CASH AND CASH EQUIVALENTS, end of the period	$ 14,643	$ 59,271