Senior Notes, Convertible Notes and Trust Preferred Securities (Tables)

12 Months Ended

Dec. 31, 2015

Debt Instrument [Line Items]

Debt Instrument Redemption

The Company had the following Senior Notes outstanding as of December 31, 2015:

Issue Date	Face Amount		Interest Rate		Maturity Date	Issue Price
May 2014	$	250,000	4.40	%	June 2024	99.883	%
June 2013	250,000		4.25	%	June 2023	99.026	%
	$	500,000

Schedule of Long-term Debt Instruments

Below is a summary of additional disclosures related to the 6.00% Convertible Guaranteed Notes.

	6.00% Convertible Guaranteed Notes
Balance Sheets:	December 31, 2015			December 31, 2014
Principal amount of debt component	$	12,400		$	16,228
Unamortized discount	(220		)	(564		)
Carrying amount of debt component	$	12,180		$	15,664
Carrying amount of equity component	$	(34,784	)	$	(33,160	)
Effective interest rate	7.8		%	8.1		%
Period through which discount is being amortized, put date	01/2017			01/2017
Aggregate if-converted value in excess of aggregate principal amount	$	2,863		$	10,432

Statements of Operations:	2015		2014		2013
6.00% Convertible Guaranteed Notes
Coupon interest	$	765	$	1,545	$	2,296
Discount amortization	228		438		658
	$	993	$	1,983	$	2,954

Senior Notes, Convertible Notes, Exchangeable Notes, and Trust Preferred Securities [Member]

Debt Instrument [Line Items]

Schedule of Maturities of Long-term Debt

Scheduled principal payments for these debt instruments for the next five years and thereafter are as follows:

Year ending December 31,	Total
2016	$	—
2017(1)	12,400
2018	—
2019	—
2020	—
Thereafter	629,120
	641,520
Debt discounts	(2,273		)
	$	639,247

(1) Although the 6.00% Convertible Guaranteed Notes mature in 2030, the notes can be put to the Company in 2017.