Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 28, 2014
Operating activities
Net income (loss)	$ 16,300	$ 24,520	$ (24,845)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	27,506	10,798	3,513
Amortization of debt issuance costs and accretion of debt discount	732	525	503
Accretion and amortization of discounts and premiums on short-term investments		240	276
Share-based compensation	3,878	809	270
(Gain) loss on disposal of property and equipment	54	303	(7)
(Gain) loss on extinguishment of debt	(18)	1,174
Gain on sale of land held for sale	(4,525)
Disposition of notes receivable		(23,590)
Impairments and other losses		357	20,997
Deferred income taxes	(4,325)	(10,216)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(3,151)	1,033
Prepaid expenses	(3,810)	2,035
Income taxes receivable	(262)	77
Other current assets	102	371	84
Accrued taxes, other than income taxes	2,193	6	(23)
Accounts payable and other accrued expenses	2,770	900	517
Other	(49)
Net cash provided by operating activities	37,395	9,342	1,285
Investing activities
Acquisition of businesses, net of cash acquired	(41,273)	25,539
Purchase of property and equipment	(30,634)	(7,946)	(4,516)
Purchase of short-term investments		(25,137)	(73,886)
Proceeds from maturities of short-term investments		35,175	70,389
Proceeds from disposal of property and equipment	2,985	4,413	258
Proceeds from sales of short-term investments		36,182	5,543
Collection on notes receivable		23,590
Other	(2,198)	(1,767)	67
Net cash provided by (used in) investing activities	(71,120)	90,049	(2,145)
Financing activities
Net borrowings on Revolving Credit Facility	5,000
Repayments of Term Loans	(8,500)	(204,560)	(1,755)
Proceeds from Term Loans	40,000	145,000
Repayments of notes payable	(2,061)
Dividends paid	(23,529)
Proceeds from issuance of common stock	1,792	168	134
Payments for debt issuance costs	(500)	(2,803)
Principal payments under capital leases	(756)
Warrant repurchase		(3,435)
Net cash provided by (used in) financing activities	11,446	(65,630)	(1,621)
Cash and cash equivalents
Net increase (decrease) for the year	(22,279)	33,761	(2,481)
Balance, beginning of year	69,177	35,416	37,897
Balance, end of year	46,898	69,177	35,416
Supplemental cash flow disclosures
Cash paid during the period for interest	5,721	2,321	$ 701
Cash paid for income taxes	260	170
Non-cash investing and financing activities
Notes payable issued for property and equipment	721	2,838
Equipment acquired under capital lease obligations	2,726
Common stock issued in connection with acquisition	$ 500	$ 77,350