Unaudited Condensed Consolidated Statements of Common Stockholders' Equity ( Deficit) Statement - USD ($) $ in Thousands	Total	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Cumulative Preferred Stock Of Subsidiary [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 572,276	$ 597,467		$ (25,191)	$ 59,784
Net Income (Loss) Available to Common Stockholders, Basic	31,500
Dividends, Common Stock	(25,328)
Stock Issued During Period, Value, Other	125	125
Other Comprehensive Income (Loss), Net of Tax	0
Net Income (Loss) Available to Common Stockholders, Basic	53,942
Preferred Stock Dividends, Income Statement Impact	1,607
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(1,607)
Payments of Ordinary Dividends, Common Stock	(51,267)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	578,573	597,592		(19,019)	59,784
Other Comprehensive Income (Loss), Net of Tax	0
Net Income (Loss) Available to Common Stockholders, Basic	22,442
Dividends, Common Stock	(25,939)
Stock Issued During Period, Value, Other	79	79
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	22,442
Preferred Stock Dividends, Income Statement Impact	804
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(804)
Payments of Ordinary Dividends, Common Stock	(25,939)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	575,155	597,671		(22,516)	59,784
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	573,266	597,824		(24,558)	59,784
Other Comprehensive Income (Loss), Net of Tax	(5,539)
Dividends, Common Stock	(31,590)
Stock Issued During Period, Value, Other	34	34
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	35,443
Other Comprehensive Income (Loss), Net of Tax	(17,188)
Net Income (Loss) Available to Common Stockholders, Basic	55,091
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	37,903
Preferred Stock Dividends, Income Statement Impact	1,607
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(1,607)
Payments of Ordinary Dividends, Common Stock	(59,935)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	577,153	597,858	$ (5,539)	(15,166)	59,784
Other Comprehensive Income (Loss), Net of Tax	(11,649)
Net Income (Loss) Available to Common Stockholders, Basic	14,109
Dividends, Common Stock	(28,345)
Stock Issued During Period, Value, Other	59	59
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	2,460
Preferred Stock Dividends, Income Statement Impact	804
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(804)
Payments of Ordinary Dividends, Common Stock	(28,345)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 551,327	$ 597,917	$ (17,188)	$ (29,402)	$ 59,784