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

12 Months Ended

Dec. 31, 2016

Debt Instrument [Line Items]

Debt Instrument Redemption

The Company had the following Senior Notes outstanding as of December 31, 2016 and 2015:

Issue Date	December 31, 2016			December 31, 2015			Interest Rate		Maturity Date	Issue Price
May 2014	$	250,000		$	250,000		4.40	%	June 2024	99.883	%
June 2013	250,000			250,000			4.25	%	June 2023	99.026	%
	500,000			500,000
Unamortized debt discount	(1,780		)	(2,053		)
Unamortized debt issuance cost	(3,858		)	(4,421		)
	$	494,362		$	493,526

Senior Notes, Convertible 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
2017	$	—
2018	—
2019	—
2020	—
2021	—
Thereafter	629,120
	629,120
Unamortized debt discounts	(1,780		)
Unamortized debt issuance costs	(5,882		)
	$	621,458