Federal Home Loan Bank Advances, Other Borrowings and Subordinated Notes (Narrative) (Details) CAD in Millions	1 Months Ended		6 Months Ended
	Dec. 31, 2015 CAD	Dec. 31, 2014 CAD	Jun. 30, 2017 USD ($) Rate	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CAD	Jun. 30, 2016 USD ($)	Jun. 15, 2015 USD ($)
Debt Instrument [Line Items]
Notes payable			$ 44,959,000	$ 52,445,000		$ 59,937,000
Loan agreement with unaffiliated banks			150,000,000
Short-term borrowings			46,280,000	61,809,000		38,798,000
Securities sold under agreements to repurchase			46,280,000
Other			49,765,000	18,154,000		18,564,000
Secured borrowings			136,706,000	130,078,000		135,312,000
Subordinated notes			$ 139,029,000	138,971,000		138,915,000
Loans Payable
Debt Instrument [Line Items]
Debt instrument, Issuance date			Dec. 15, 2014
Term Facility
Debt Instrument [Line Items]
Notes payable			$ 45,000,000	52,400,000		59,900,000	$ 75,000,000
Debt instrument, Date of first required payment			Sep. 30, 2015
Debt instrument, Frequency of periodic payment			quarterly
Revolving Credit Facility
Debt Instrument [Line Items]
Notes payable			$ 0	0		0
Maximum borrowing capacity			$ 75,000,000
Debt instrument, Frequency of periodic payment			quarterly
Line of credit facility, Unused capacity, Commitment fee percentage | Rate			0.20%
Securities Sold under Agreements to Repurchase
Debt Instrument [Line Items]
Securities sold under agreements to repurchase			$ 46,300,000	61,800,000		38,800,000
Pledged financial instruments, Not separately reported, Securities for repurchase agreements			$ 69,400,000
Fixed Rate Promissory Note
Debt Instrument [Line Items]
Debt instrument, Issuance date			Jun. 30, 2017
Maturity date			Jun. 30, 2022
Debt instrument, Frequency of periodic payment			monthly
Other			$ 49,500,000	17,700,000		18,000,000
Contractual rate			3.36%
Non Recourse Debt
Debt Instrument [Line Items]
Other			$ 300,000	447,000		591,000
Secured Debt
Debt Instrument [Line Items]
Secured borrowings			$ 13,300,000
Subordinated Debt
Debt Instrument [Line Items]
Maturity date			Jun. 13, 2024
Contractual rate			5.00%
Base Rate Loan | Base Rate | Term Facility
Debt Instrument [Line Items]
Basis spread on variable rate			0.75%
Base Rate Loan | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate			0.50%
Base Rate Loan | Eurodollar Rate
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%
Base Rate Loan | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.50%
Eurodollar Rate Loan | London Interbank Offered Rate (LIBOR) | Term Facility
Debt Instrument [Line Items]
Basis spread on variable rate			1.75%
Eurodollar Rate Loan | London Interbank Offered Rate (LIBOR) | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate			1.50%
Receivables Purchase Agreement | Secured Debt
Debt Instrument [Line Items]
Maturity date	Dec. 15, 2017	Dec. 15, 2015
Contractual rate			1.6431%
Secured borrowings		CAD 150	$ 123,400,000	$ 119,000,000	CAD 160	$ 123,700,000
Additional amount paid by third party | CAD	CAD 10