CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Comprehensive income	$ 48,047	$ 9,362	$ 3,947
Cash flows from operating activities attributable to continuing operations:
Net income and comprehensive income	48,047	9,362	3,947
Less: Loss (income) from discontinued operations, net of tax	3,269	(9,849)	(4,620)
Net income (loss) from continuing operations	51,316	(487)	(673)
Adjustments to reconcile income (loss) from continuing operations to net cash provided by operating activities attributable to continuing operations:
Loss on disposal of fixed assets	748	282	165
Impairment of long-lived assets	0	805	0
Amortization of intangibles	149	136	147
Depreciation	3,008	3,245	3,501
Non-cash compensation expense	8,508	7,446	5,627
Deferred income taxes	(29,969)	106	64
Excess tax benefit from stock-based award activity	(4,601)		0
Bad debt expense	337	206	248
Amortization of debt issuance costs	47	0	0
Changes in current assets and liabilities:
Accounts receivable	(16,598)	(1,228)	(3,614)
Prepaid and other current assets	(874)	(84)	(170)
Accounts payable, accrued expenses and other current liabilities	13,689	(1,935)	6,157
Income taxes payable	6,247	740	(610)
Other, net	577	(157)	(604)
Net cash provided by operating activities attributable to continuing operations	32,584	9,075	10,238
Cash flows from investing activities attributable to continuing operations:
Capital expenditures	(7,237)	(3,856)	(2,750)
Acquisition of a business	(37)	(740)	0
Decrease in restricted cash	12,175	7,300	3,397
Net cash provided by investing activities attributable to continuing operations	4,901	2,704	647
Cash flows from financing activities attributable to continuing operations:
Payments related to net-share settlement of stock -based compensation, net of proceeds from exercise of stock options	(7,612)	(4,812)	(2,806)
Proceeds from equity offering, net of offering costs	91,484	0	0
Payment of debt issuance costs	(1,215)	0	0
Excess tax benefit from stock-based award activity	4,601	0	0
Purchase of treasury stock	(218)	(2,610)	(3,321)
Dividends	(131)	(229)	144
Net cash provided by (used in) financing activities attributable to continuing operations	86,909	(7,651)	(5,983)
Total cash provided by continuing operations	124,394	4,128	4,902
Discontinued operations:
Net cash used in operating activities attributable to discontinued operations	(3,631)	(9,583)	(3,425)
Net cash provided by investing activities attributable to discontinued operations	0	0	10,000
Total cash (used in) provided by discontinued operations	(3,631)	(9,583)	6,575
Net increase (decrease) in cash and cash equivalents	120,763	(5,455)	11,477
Cash and cash equivalents at beginning of period	86,212	91,667	80,190
Cash and cash equivalents at end of period	206,975	86,212	91,667
Supplemental cash flow information:
Interest	60	2	19
Income tax payments	703	3	654
Income tax refunds	$ (96)	$ (779)	$ (4)