Earning Per Common Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year Ended December 31,
	2017		2016		2015
	(In thousands, except per share data)
Net income (loss)	$	52,646	$	59,186	$	(2,504)
Less: Dividends on preferred stock
Non-convertible preferred stock (Series A, B, and D)		(6,512)		(6,512)		(6,512)
Convertible preferred stock (Series C)		(7,350)		(7,350)		(7,350)
Income (loss) Income available to common shareholders	$	38,784	$	45,324	$	(16,366)
Effect of assumed conversion of the convertible preferred stock		7,350		7,350		7,350
Income (loss) available to common shareholders assuming conversion	$	46,134	$	52,674	$	(9,016)
Weighted average common shares and share equivalents:
Average common shares outstanding		43,939		43,913		44,231
Effect of dilutive securities:
Average potential common shares-options		19		37		68
Average potential common shares-assuming conversion of convertible preferred stock		7,138		7,138		7,156
Total weighted average common shares outstanding and equivalents		51,096		51,088		51,455
Earnings (loss) per common share - basic	$	0.88	$	1.03	$	(0.37)
Earnings (loss) per common share - diluted	$	0.88	$	1.03	$	(0.37)