Quarterly report pursuant to Section 13 or 15(d)

LEEVAC Transaction - Pro Forma Results (Details)

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LEEVAC Transaction - Pro Forma Results (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]        
Revenue $ 81,502 $ 84,338 $ 165,481 $ 183,571
Net income (loss) 5,540 1,357 6,529 1,440
Purchase price depreciation (6,311) (6,543) (12,878) (13,140)
Interest expense (88) (50) (138) (87)
LEEVAC        
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]        
Revenue 17,300   39,100  
Net income (loss) $ 1,500   $ 751  
Pro Forma        
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]        
Revenue   84,338   183,571
Net income (loss)   1,357   1,440
Pro forma revenue   108,713   232,664
Pro forma net income (loss)   51   (3,311)
Pro Forma | Pro Forma Adjustment to Historical Results        
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]        
Revenue   0   0
Net income (loss)   860   1,823
Purchase price depreciation   337   537
Interest expense   523   1,286
Pro Forma | LEEVAC        
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]        
Revenue   24,375   49,093
Net income (loss)   $ (2,166)   $ (6,574)