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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (21,339,000) $ (9,723,000)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 35,569,000 30,292,000
Noncash compensation 794,000 821,000
Deferred income tax benefit (11,086,000) (4,249,000)
Loss (gain) on disposal of assets 1,392,000 (225,000)
Other 431,000 (75,000)
Change in current assets and liabilities:    
Decrease in accounts receivable (14,141,000) (15,659,000)
Decrease in prepaid expenses and other assets (1,684,000) (1,850,000)
(Decrease) increase in accounts payable (2,787,000) 860,000
Decrease in accrued liabilities (2,100,000) (871,000)
Increase (decrease) in deferred revenue 1,179,000 (2,184,000)
Net cash provided by operating activities 17,878,000 32,155,000
CASH FLOWS FROM INVESTING ACTIVITIES:    
Cash acquired from Merger 12,382,000  
Capital expenditures, net of noncash capital expenditures summarized below (5,123,000) (11,446,000)
Proceeds from maturity of short-term investments 21,500,000 21,250,000
Acquisition of short-term investments (12,000,000) (22,250,000)
Proceeds from disposal of assets 1,094,000 2,682,000
Net cash provided by (used in) investing activities 17,853,000 (9,764,000)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from promissory note 5,144,000  
Principal payments on notes payable (14,152,000) (8,510,000)
Principal payments on capital lease obligations (1,165,000) (726,000)
Excess tax benefit from share-based payment arrangement (567,000)  
Tax withholdings related to stock based compensation awards (248,000)  
Proceeds from exercise of stock options   18,000
Dividends paid   (1,935,000)
Net cash used in financing activities (10,988,000) (11,153,000)
Effect of exchange rate changes in cash and cash equivalents (372,000) (345,000)
Net increase in cash and cash equivalents 24,371,000 10,893,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 14,644,000 11,860,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD 39,015,000 22,753,000
SUPPLEMENTAL CASH FLOW INFORMATION:    
Cash paid for interest 491,000 420,000
Cash paid for income taxes 721,000 735,000
Cash received for income taxes 706,000  
NONCASH INVESTING AND FINANCING ACTIVITIES:    
Increase (decrease) in accrued purchases of property and equipment 136,000 (2,046,000)
Capital lease obligations incurred 126,000 $ 485,000
Stock consideration to consummate the Merger $ 42,902,000