Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2014

Long-Term Debt [Abstract]

Schedule of long-term debt instruments

Long-term debt consists of the following:

	December 31, 2014		December 31, 2013
Credit facility	$	200,000	$	114,000
Exchangeable unsecured notes, due 2102		38,642		38,642
Convertible senior debentures, due 2040		103,841		101,846
Convertible senior debentures, due 2041		53,249		52,264
Convertible senior debentures, due 2042		59,190		58,159
		454,922		364,911
Less current portion		-		-
	$	454,922	$	364,911

Key terms of the convertible debentures

The following table summarizes some key facts and terms regarding the three series of outstanding convertible senior debentures following the adjustment made to the conversion rate of the debentures on the ex-dividend date of the December 16, 2014 dividend payment:

	Due 2040			Due 2041			Due 2042
Issuance date	November 9, 2010			May 13, 2011			May 31, 2012
Maturity date	November 15, 2040			May 15, 2041			June 1, 2042
Principal amount	$	275,000		$	150,000		$	150,000
Cash coupon rate (per annum)		2.25	%		2.25	%		2.25	%
Nonconvertible debt borrowing rate at issuance (per annum)		8.00	%		8.375	%		7.50	%
Conversion rate effective November 24, 2014 (per $1 principal amount)		73.2147			53.4282			86.0829
Effective conversion price effective November 24, 2014 (per share)	$	13.66		$	18.72		$	11.62
130% of the conversion price (per share)	$	17.76		$	24.34		$	15.11
Call date	November 20, 2020			May 20, 2021			June 7, 2022

Liability and equity components of the convertible debentures

The carrying values of the liability and equity components of the convertible debentures are reflected in the Company's consolidated balance sheets as follows:

	Principal amount of the debentures		Unamortized discount			Embedded derivative		Carrying value of liability component		Equity component - net carrying value
December 31, 2014
Due 2040	$	275,000		(171,685	)		526	$	103,841	$	110,094
Due 2041	$	150,000		(97,092	)		341	$	53,249	$	62,246
Due 2042	$	150,000		(91,048	)		238	$	59,190	$	57,874
Total	$	575,000	$	(359,825	)	$	1,105	$	216,280	$	230,214
December 31, 2013
Due 2040	$	275,000		(173,645	)		491	$	101,846	$	110,094
Due 2041	$	150,000		(98,085	)		349	$	52,264	$	62,246
Due 2042	$	150,000		(92,038	)		197	$	58,159	$	57,874
Total	$	575,000	$	(363,768	)	$	1,037	$	212,269	$	230,214

Schedule of Interest Expense on Convertible Debt [Table Text Block]

Interest expense related to the debentures is reflected on the consolidated statements of operations for the years ended December 31:

	Contractual coupon interest		Non-cash amortization of debt discount		Non-cash amortization of deferred financing costs		Non-cash change in value of derivative liability			Total interest expense related to the debentures
2014
Due 2040	$	6,188		1,960		88		35		$	8,271
Due 2041	$	3,375		993		47		(8	)	$	4,407
Due 2042	$	3,375		990		54		41		$	4,460
Total	$	12,938	$	3,943	$	189	$	68		$	17,138
2013
Due 2040	$	6,188		1,811		88		(131	)	$	7,956
Due 2041	$	3,375		915		47		(50	)	$	4,287
Due 2042	$	3,375		920		54		(85	)	$	4,264
Total	$	12,938	$	3,646	$	189	$	(266	)	$	16,507
2012
Due 2040	$	6,188		1,675		88		28		$	7,979
Due 2041	$	3,375		843		45		7		$	4,270
Due 2042	$	1,978		510		32		46		$	2,566
Total	$	11,541	$	3,028	$	165	$	81		$	14,815

Aggregate annual maturities of long-term debt

Other Borrowings Information

Aggregate annual maturities of long-term debt, based on the terms stated in the respective agreements, are as follows:

2015	$	-
2016		-
2017		-
2018		200,000
2019		-
Thereafter		613,642