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Long-Term Debt (Narrative) (Details)
$ in Thousands
2 Months Ended 4 Months Ended 6 Months Ended
May 08, 2017
USD ($)
Oct. 01, 2016
USD ($)
May 24, 2016
May 23, 2016
Jun. 30, 2017
USD ($)
May 07, 2017
USD ($)
Jun. 30, 2017
USD ($)
agreement
item
$ / agreement
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Apr. 13, 2015
USD ($)
Sep. 11, 2014
USD ($)
Jul. 12, 2014
USD ($)
Debt Instrument [Line Items]                        
Proceeds from line of credit             $ 20,000 $ 17,000        
Repayment of credit facility             20,000          
Repayment of accrued interest             $ 938 $ 1,015        
Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available           $ 125,000            
Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Line of credit outstanding amount                 $ 24,100      
Debt instrument, maturity date             Nov. 10, 2020          
Capital Leases [Member]                        
Debt Instrument [Line Items]                        
Option to purchase assets per lease agreement | $ / agreement             1          
Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available         $ 100,000 100,000 $ 100,000   $ 79,700      
Repayment of credit facility $ 23,800         20,000            
Repayment of accrued interest 100                      
Write off of unamortized debt issuance cost 1,300                      
Specified advance multiple used to determine funds availability under credit facility     3.75 3.25     3.75          
Debt instrument leverage ratio     4.00% 3.50%                
Term Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available           50,000            
Delayed Draw Term Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available           25,000            
Letters of Credit [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available           $ 35,000            
First American Commercial Bancorp [Member] | Capital Leases [Member]                        
Debt Instrument [Line Items]                        
Number of capital lease agreements | agreement             3          
Capital lease agreements term             48 months          
Capital lease agreements amount                   $ 400 $ 1,400 $ 2,700
Meridian Leasing Corporation [Member]                        
Debt Instrument [Line Items]                        
Capital lease agreements amount   $ 600                    
Debt instrument stated interest rate   11.10%                    
Meridian Leasing Corporation [Member] | Capital Leases [Member]                        
Debt Instrument [Line Items]                        
Capital lease agreements term   25 months                    
Minimum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Fee charged on unused portion of revolving credit facility             0.25%          
Minimum [Member] | First American Commercial Bancorp [Member] | Capital Leases [Member]                        
Debt Instrument [Line Items]                        
Debt instrument stated interest rate         3.00%   3.00%          
Maximum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Fee charged on unused portion of revolving credit facility             0.50%          
Maximum [Member] | First American Commercial Bancorp [Member] | Capital Leases [Member]                        
Debt Instrument [Line Items]                        
Debt instrument stated interest rate         3.60%   3.60%          
One Month LIBOR [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             3.00%          
Federal Funds Rate [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             0.50%          
New Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available 250,000                      
Credit facility maturity period             5 years          
Debt issuance costs         $ 2,800   $ 2,800          
Proceeds from line of credit         0              
Line of credit outstanding amount         45,000   45,000          
New Credit Facility [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available 125,000       $ 86,500   $ 86,500          
New Credit Facility [Member] | Term Loan [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available 45,000                      
New Credit Facility [Member] | Delayed Draw Term Loan [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available 80,000                      
New Credit Facility [Member] | Uncommitted Incremental Term Loan [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available $ 100,000                      
New Credit Facility [Member] | Minimum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Fee charged on unused portion of revolving credit facility             0.25%          
New Credit Facility [Member] | Maximum [Member]                        
Debt Instrument [Line Items]                        
Maximum ratio used to determin availability of additional draws 4.25%                      
New Credit Facility [Member] | Maximum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Fee charged on unused portion of revolving credit facility             0.50%          
New Credit Facility [Member] | One Month LIBOR [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             1.00%          
New Credit Facility [Member] | One Month LIBOR [Member] | Minimum [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             0.00%          
New Credit Facility [Member] | Federal Funds Rate [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             0.50%          
Amended Credit Facility [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Maximum number of acquisitions in a year | item             3          
Basis for Availability of Funds Debt Covenant One [Member] | Minimum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             2.00%          
Basis for Availability of Funds Debt Covenant One [Member] | Maximum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             2.50%          
Basis for Availability of Funds Debt Covenant Two [Member] | Minimum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             3.00%          
Basis for Availability of Funds Debt Covenant Two [Member] | Maximum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             3.50%          
Basis for Availability of Funds Debt Covenant Three [Member] | Minimum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             3.00%          
Basis for Availability of Funds Debt Covenant Three [Member] | Maximum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             3.50%          
Restriction on Dividends [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Aggregate amount of dividends and distributions             $ 5,000          
Restriction on Dividends [Member] | Minimum [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Availability of revolving credit commitment under credit facility percent             40.00%          
Restriction on Dividends [Member] | New Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Aggregate amount of dividends and distributions             $ 5,000          
Restriction on Ability to Consummate Acquisitions [Member] | Revolving Credit Loan [Member] | Terminated Senior Secured Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Maximum single acquisition price             25,000          
Maximum total purchase price allowed             40,000          
Restriction on Ability to Consummate Acquisitions [Member] | New Credit Facility [Member]                        
Debt Instrument [Line Items]                        
Maximum single acquisition price             60,000          
Maximum total purchase price allowed             $ 80,000          
Based On Applicable Senior Leverage Ratio [Member] | New Credit Facility [Member] | Minimum [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             1.50%          
Based On Applicable Senior Leverage Ratio [Member] | New Credit Facility [Member] | Maximum [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             2.25%          
Based On Applicable Leverage Ratio [Member] | New Credit Facility [Member] | Minimum [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             2.50%          
Based On Applicable Leverage Ratio [Member] | New Credit Facility [Member] | Maximum [Member]                        
Debt Instrument [Line Items]                        
Debt instrument variable interest rate margin             3.25%