Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Schedule of Stock by Class

Share activity during the year ended December 31, 2017 is as follows:

	Preferred Stock Series E		Preferred Stock Series F	Common Stock Issued	Treasury Stock Held		Common Stock Outstanding
Balance at January 1, 2017	5,060		—	93,651,601	1,899,502		91,752,099
Restricted share activity	—		—	—	(124,800	)	124,800
Stock options exercised	—		—	—	(338,176	)	338,176
Common stock repurchased	—		—	—	222,000		(222,000	)
Warrant exercise	—		—	28,690	—		28,690
Series F Preferred Stock issuance	—		6,000	—	—		—
Series E Preferred Stock redemption	(5,060	)	—	—	—		—
Balance at December 31, 2017	—		6,000	93,680,291	1,658,526		92,021,765