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Debt (Narrative) (Canadian Credit Facilities) (Details) $ in Thousands, CAD in Millions	1 Months Ended
	Mar. 27, 2015 USD ($)	Mar. 27, 2015 CAD	Jun. 30, 2011 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2011 CAD
Line of Credit Facility [Line Items]
Credit facilities amount outstanding				$ 9,874	$ 6,860
Canadian Credit Facilities (Facility C)
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity | CAD						CAD 10.0
Repayments of lines of credit	$ 4,000	CAD 5.0
Credit facilities amount outstanding				800	5,400
Debt instrument amortization period			5 years
Canadian Credit Facilities (Facility C) | EBITDA Equal to or Greater than 2.00 [Member]
Line of Credit Facility [Line Items]
Standby fee percentage			0.625%
Canadian Credit Facilities (Facility C) | EBITDA is Less than 2.00 [Member]
Line of Credit Facility [Line Items]
Standby fee percentage			0.5625%
Canadian Credit Facilities (Facility C) | Base Rate Plus Funds Borrowed In United States Dollars [Member] | EBITDA Equal to or Greater than 2.00 [Member]
Line of Credit Facility [Line Items]
Interest rate spread			1.25%
Canadian Credit Facilities (Facility C) | Base Rate Plus Funds Borrowed In United States Dollars [Member] | EBITDA is Less than 2.00 [Member]
Line of Credit Facility [Line Items]
Interest rate spread			1.00%
Canadian Credit Facilities (Facility C) | Prime Plus Funds Borrowed In Canadian Dollars [Member] | EBITDA Equal to or Greater than 2.00 [Member]
Line of Credit Facility [Line Items]
Interest rate spread			1.25%
Canadian Credit Facilities (Facility C) | Prime Plus Funds Borrowed In Canadian Dollars [Member] | EBITDA is Less than 2.00 [Member]
Line of Credit Facility [Line Items]
Interest rate spread			1.00%
Canadian Credit Facilities (Facility C) | LIBOR Plus Funds Borrowed In USD [Member] | EBITDA Equal to or Greater than 2.00 [Member]
Line of Credit Facility [Line Items]
Interest rate spread			2.50%
Canadian Credit Facilities (Facility C) | LIBOR Plus Funds Borrowed In USD [Member] | EBITDA is Less than 2.00 [Member]
Line of Credit Facility [Line Items]
Interest rate spread			2.25%
Canadian Credit Facilities (Facility B)
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity | CAD						2.0
Credit facilities amount outstanding				400	800
Debt instrument amortization period			5 years
Canadian Credit Facilities (Facility A)
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity | CAD						10.0
Credit facilities amount outstanding				500	900
Canadian Credit Facilities (Facility A) | Base Rate Plus Funds Borrowed In United States Dollars [Member]
Line of Credit Facility [Line Items]
Interest rate spread			0.50%
Canadian Credit Facilities (Facility A) | Prime Plus Funds Borrowed In Canadian Dollars [Member]
Line of Credit Facility [Line Items]
Interest rate spread			0.50%
Canadian Credit Facilities (Facility A) | LIBOR Plus Funds Borrowed In USD [Member]
Line of Credit Facility [Line Items]
Interest rate spread			2.00%
Term Credit Facilities [Member]
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity			$ 15,900			CAD 22.0
Credit facilities amount outstanding				$ 1,700	$ 7,100
Minimum [Member] | Canadian Credit Facilities (Facility B) | Base Rate Plus Funds Borrowed In United States Dollars [Member]
Line of Credit Facility [Line Items]
Interest rate spread			1.00%

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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-Number 210
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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-Name Accounting Standards Codification
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