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Long-Term Debt (Narrative) (Details)
$ in Thousands
12 Months Ended
Oct. 01, 2016
USD ($)
Jul. 14, 2016
USD ($)
May 24, 2016
USD ($)
May 23, 2016
May 05, 2016
USD ($)
Feb. 05, 2016
USD ($)
Jan. 12, 2016
USD ($)
Dec. 31, 2016
USD ($)
agreement
item
Dec. 31, 2015
USD ($)
Apr. 13, 2015
USD ($)
Sep. 11, 2014
USD ($)
Jul. 12, 2014
USD ($)
Debt Instrument [Line Items]                        
Proceeds from line of credit               $ 27,000        
Maximum number of acquisitions in a year | item               3        
Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Line of credit outstanding amount                 $ 0      
Line of credit facility available amount                 $ 58,300      
Maximum single acquisition price               $ 25,000        
Maximum total purchase price allowed over term of credit facility               $ 40,000        
First American Commercial Bancorp [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 term 25 months                      
Capital lease agreements amount $ 600                      
Debt instrument interest rate 11.10%                      
Minimum [Member] | First American Commercial Bancorp [Member]                        
Debt Instrument [Line Items]                        
Debt instrument interest rate               3.00%        
Maximum [Member] | First American Commercial Bancorp [Member]                        
Debt Instrument [Line Items]                        
Debt instrument interest rate               3.60%        
Amended Credit Facility [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available     $ 100,000         $ 100,000        
Proceeds from line of credit   $ 10,000     $ 10,000   $ 10,000          
Specified advance multiple used to determine funds availability under credit facility     3.75 3.25                
Maximum senior leverage ratio     4.00 3.50                
Amount of debt transferred from revolving credit line to term loan     $ 3,000                  
Line of credit outstanding amount               24,100        
Line of credit facility available amount               $ 79,700        
Line of credit facility, expiration date               Nov. 10, 2020        
Amended Credit Facility [Member] | Delayed Draw Term Loan [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available     25,000                  
Proceeds from line of credit           $ 22,000            
Amended Credit Facility [Member] | Uncommitted Incremental Term Loan [Member]                        
Debt Instrument [Line Items]                        
Maximum aggregate loan amount available     50,000                  
Amended Credit Facility [Member] | Letters of Credit [Member]                        
Debt Instrument [Line Items]                        
Sublimit for issuance of letters of credit     $ 35,000                  
Amended Credit Facility [Member] | Minimum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Fee charged on unused portion of revolving credit facility               0.25%        
Amended Credit Facility [Member] | Maximum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Fee charged on unused portion of revolving credit facility               0.50%        
Basis for Availability of Funds Debt Covenant One [Member] | One Month LIBOR [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate margin               3.00%        
Basis for Availability of Funds Debt Covenant One [Member] | Amended Credit Facility [Member] | Minimum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate margin               2.00%        
Basis for Availability of Funds Debt Covenant One [Member] | Amended Credit Facility [Member] | Maximum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate margin               2.50%        
Basis for Availability of Funds Debt Covenant One [Member] | Amended Credit Facility [Member] | Federal Funds Rate [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate margin               0.50%        
Basis for Availability of Funds Debt Covenant Two [Member] | Amended Credit Facility [Member] | Minimum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate margin               3.00%        
Basis for Availability of Funds Debt Covenant Two [Member] | Amended Credit Facility [Member] | Maximum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate margin               3.50%        
Basis for Availability of Funds Debt Covenant Three [Member] | Amended Credit Facility [Member] | Minimum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate margin               3.00%        
Basis for Availability of Funds Debt Covenant Three [Member] | Amended Credit Facility [Member] | Maximum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate margin               3.50%        
Restriction on Dividends [Member] | Minimum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Availability of revolving credit commitment under credit facility percent               40.00%        
Restriction on Dividends [Member] | Maximum [Member] | Revolving Credit Loan [Member]                        
Debt Instrument [Line Items]                        
Aggregate amount of dividends and distributions               $ 5,000