Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE at Dec. 31, 2013	$ 624,744,000	$ 92,000	$ (55,964,000)	$ 321,532,000	$ 344,432,000	$ 14,652,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	12,767,000			12,767,000
Share-based compensation (shares)		(144,000)
Exercises of stock options and issuance of restricted stock awards	555,000		$ 1,398,000	(843,000)
Exercises of stock options and issuance of restricted stock awards (in shares)		800,000	7,000
Purchase of common stock	$ (145,858,000)		$ (145,858,000)
Purchase of common stock (in shares)	(10,600,000)	(10,590,000)	(10,590,000)
Series A preferred dividends	$ (11,301,000)				(11,301,000)
Series A preferred accretion	(2,735,000)				(2,735,000)
Series A preferred beneficial conversion	12,276,000			12,276,000	0
Net loss	(4,926,000)				(4,926,000)
Other comprehensive loss	(33,004,000)					(33,004,000)
BALANCE at Dec. 31, 2014	452,518,000	$ 92,000	$ (200,424,000)	345,732,000	325,470,000	(18,352,000)
BALANCE (in shares) at Dec. 31, 2013		88,450,000	3,212,000
BALANCE (in shares) at Dec. 31, 2014		78,516,000	13,809,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	11,186,000			11,186,000
Tax shortfall from share-based plans	(2,841,000)			(2,841,000)
Exercises of stock options and issuance of restricted stock awards	1,603,000	$ 2,000	$ 2,437,000	(836,000)
Exercises of stock options and issuance of restricted stock awards (in shares)		810,000	(34,000)
Purchase of common stock	$ (85,926,000)		$ (85,926,000)
Purchase of common stock (in shares)	(6,500,000)	(6,475,000)	(6,475,000)
Series A preferred dividends	$ (11,833,000)				(11,833,000)
Series A preferred accretion	(2,978,000)				(2,978,000)
Series A preferred beneficial conversion	0
Net loss	(83,196,000)				(83,196,000)
Other comprehensive loss	(32,561,000)					(32,561,000)
BALANCE at Dec. 31, 2015	245,972,000	$ 94,000	$ (283,913,000)	353,241,000	227,463,000	(50,913,000)
BALANCE (in shares) at Dec. 31, 2015		72,851,000	20,250,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	10,736,000			10,736,000
Exercises of stock options and issuance of restricted stock awards	96,000	$ 0	$ (324,000)	420,000
Exercises of stock options and issuance of restricted stock awards (in shares)		749,000	37,000
Purchase of common stock	$ 0
Purchase of common stock (in shares)	0
Series A preferred dividends	$ (12,000,000)				(12,000,000)
Series A preferred accretion	(3,244,000)				(3,244,000)
Series A preferred beneficial conversion	0
Net loss	(16,494,000)				(16,494,000)
Other comprehensive loss	(4,683,000)				0	(4,683,000)
BALANCE at Dec. 31, 2016	$ 220,383,000	$ 94,000	$ (284,237,000)	$ 364,397,000	$ 195,725,000	$ (55,596,000)
BALANCE (in shares) at Dec. 31, 2016		73,600,000	20,287,000