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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Statement Of Cash Flows [Abstract]    
Net cash provided by (used in) operating activities $ 5,030 $ (8,555)
Cash flows from investing activities    
Restricted cash   95
Purchases of property and equipment (749) (635)
Acquisitions of businesses (2,006) (687)
Proceeds from sale of property and equipment 160 112
Net cash used in investing activities (2,595) (1,115)
Cash flows from financing activities    
Proceeds from issuance of common stock, net of costs 87,645  
Redemption of Redeemable Preferred Stock (75,735)  
(Payments) proceeds from revolving line of credit, net (8,714) 9,965
Principal payments on long term debt (296) (46)
Payments on capital lease obligations (2,120) (1,141)
Payments for deferred offering costs (2,130)  
Net cash (used in) provided by financing activities (1,350) 8,778
Net change in cash 1,085 (892)
Cash at beginning of period 4,065 3,898
Cash at end of period 5,150 3,006
Supplemental disclosures of cash flow information Net cash paid during the period for:    
Interest 313 199
Income taxes, net of refunds 467 4,157
Supplemental disclosure of noncash investing and financing activities    
Vehicles capitalized under capital leases and related lease obligations 4,633 2,991
Note payable issued in connection with acquisition of business   300
Unpaid offering costs $ 2,085