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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Cash flows from operating activities    
Net income $ 6,341 $ 1,114
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 19,862 6,859
Amortization of debt issuance costs and accretion of debt discount 538 363
Accretion and amortization of discounts and premiums on short-term investments   240
Share-based compensation 2,509 410
(Gain) loss on disposal of property and equipment (344) 6
Loss on extinguishment of debt   1,174
Impairments and other losses   357
Deferred income taxes 776 (12,728)
Changes in operating assets and liabilities, net of acquisitions:    
Accounts receivable (973) 1,194
Prepaid expenses (2,916) 1,272
Income taxes receivable   (144)
Other current assets (90) 231
Deposits   150
Accrued taxes, other than income taxes (212) (180)
Accounts payable and other accrued expenses 2,602 (1,076)
Other (289)  
Net cash provided by (used in) operating activities 27,804 (758)
Cash flows from investing activities    
Acquisition of businesses, net of cash acquired (41,273) 25,539
Purchase of property and equipment (24,208) (2,882)
Purchase of short-term investments   (25,137)
Proceeds from maturities of short-term investments   71,357
Proceeds from disposal of property and equipment 400 4,409
Issuance of notes receivable (107)  
Other (2,083) (1,399)
Net cash provided by (used in) investing activities (67,271) 71,887
Cash flows from financing activities    
Repayments of Term Loans (5,500) (202,546)
Proceeds from Term Loans 40,000 145,336
Repayments of notes payable (1,539)  
Dividends paid (23,529)  
Proceeds from issuance of common stock 1,778 35
Payments for debt issuance costs (500) (2,723)
Principal payments under capital leases (457)  
Warrant repurchase   (3,435)
Other   (56)
Net cash provided by (used in) financing activities 10,253 (63,389)
Net increase (decrease) for the period (29,214) 7,740
Balance, beginning of period 69,177 35,416
Balance, end of period 39,963 43,156
Supplemental cash flow disclosures    
Interest 4,248 1,160
Non-cash investing and financing activities    
Notes payable issued for property and equipment 345  
Equipment acquired under capital lease obligations 2,597  
Common stock issued in connection with acquisition $ 500 $ 75,304