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Debt (Loans) (Details) - Credit Agreement [Member] - USD ($)
Mar. 31, 2017
Nov. 15, 2016
Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity, including optional additional capacity   $ 90,000,000
Maximum borrowing capacity $ 90,000,000  
Additional borrowing capacity upon satisfaction of terms and conditions   20,000,000.0
Maximum stock repurchase capacity 8,300,000.0  
Line of Credit [Member] | U.S. [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 500,000.0  
Line of Credit [Member] | Canadian [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 250,000.00  
Line of Credit [Member] | Subordinated, unsecured debt [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 16,700,000.0  
Revolving Credit Facility [Member] | U.S. [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity   9,000,000.0
Revolving Credit Facility [Member] | Canadian [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity   1,000,000.0
Term Loan [Member] | U.S. [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity   44,400,000.0
Term Loan [Member] | Canadian [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity   5,600,000.0
DDTL [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity   $ 10,000,000.0