Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net income	$ 6,123	$ 12,824
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	11,518	10,165
Amortization	17,632	19,692
Provision for doubtful accounts	1,938	1,369
Stock-based compensation	1,947	6,058
Deferred income taxes	(10,094)	(4,815)
Amortization of deferred financing costs and debt discount	1,053	1,071
Excess tax benefit upon exercise of stock options	(258)	(2,239)
Equity in net loss of investee	4,176	3,542
Other non-cash charges (credits)	(806)	(225)
Changes in operating assets and liabilities:
Accounts receivable	(6,531)	(60,908)
Other receivables	815	(2,617)
Restricted cash		69
Prepaid expenses and other	(26,724)	(8,734)
Reinsurance liability reserve	2,784	9,691
Accounts payable and accrued expenses	44,052	17,755
Income taxes payable on sale of business	(28,337)
Accrued transportation costs	12,119	6,022
Deferred revenue	1,448	14,555
Other long-term liabilities	4,642	281
Net cash provided by operating activities	37,497	23,556
Investing activities
Purchase of property and equipment	(23,636)	(13,122)
Net decrease in short-term investments	(9)	(9)
Acquisitions, net of cash acquired		(1,665)
Equity investments	(6,381)	(13,784)
Restricted cash for reinsured claims losses	3,849	(413)
Net cash used in investing activities	(26,177)	(28,993)
Financing activities
Proceeds from issuance of preferred stock, net of issuance costs		80,667
Preferred stock dividends	(2,197)	(1,698)
Repurchase of common stock, for treasury	(32,534)	(734)
Proceeds from common stock issued pursuant to stock option exercise	787	2,377
Excess tax benefit upon exercise of stock options	258	2,239
Repayment of long-term debt	(15,500)	(87,125)
Proceeds from long-term debt	22,500
Payment of contingent consideration		(7,496)
Other financing costs	(47)	(29)
Net cash used in financing activities	(26,733)	(11,799)
Effect of exchange rate changes on cash	(533)	1,991
Net change in cash and cash equivalents	(15,946)	(15,245)
Cash and cash equivalents at beginning of period	84,770	160,406
Cash and cash equivalents at end of period	68,824	145,161
Supplemental cash flow information:
Cash paid for interest	6,083	8,994
Cash paid for income taxes	45,265	12,484
Accrued unfunded future equity investment capital contributions		$ 9,328