Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Net Income Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount											15,000
Net income (loss)									$ 27,806us-gaap_NetIncomeLoss	$ 68,069us-gaap_NetIncomeLoss	$ 74,042us-gaap_NetIncomeLoss
Preferred Stock Dividends									(9,176)	(7,902)	(2,036)
Net income to common shareholders	1,379	28,572	(3,028)	19,266	(6,921)	29,442	18,381	(8,293)	18,630	60,167	72,006
Weighted average common shares - basic and diluted									54,701,485	54,647,643	53,146,416
Effect of dilutive instruments on net income									0	0	0
Diluted net income to common shareholders									$ 18,630	$ 60,167	$ 72,006
Effect of dilutive instruments on weighted average common shares									0	0	0
Diluted, Weighted Average Number Common Shares									54,701,485	54,647,643	53,146,416
Net income per common share - basic and diluted	$ 0.03us-gaap_EarningsPerShareBasicAndDiluted	$ 0.52us-gaap_EarningsPerShareBasicAndDiluted	$ (0.06)us-gaap_EarningsPerShareBasicAndDiluted	$ 0.35us-gaap_EarningsPerShareBasicAndDiluted	$ (0.13)us-gaap_EarningsPerShareBasicAndDiluted	$ 0.54us-gaap_EarningsPerShareBasicAndDiluted	$ 0.34us-gaap_EarningsPerShareBasicAndDiluted	$ (0.15)us-gaap_EarningsPerShareBasicAndDiluted	$ 0.34us-gaap_EarningsPerShareBasicAndDiluted	$ 1.10us-gaap_EarningsPerShareBasicAndDiluted	$ 1.35us-gaap_EarningsPerShareBasicAndDiluted