CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 60,891,000	$ 57,276,000
Finite-Lived Intangible Assets, Accumulated Amortization	137,613,000	132,468,000
Other Finite-Lived Intangible Assets, Accumulated Amortization	$ 5,113,000	$ 4,768,000
SHAREHOLDERS' EQUITY:
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized ( in shares)	5,000,000	5,000,000
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	200,000,000	200,000,000
Common Stock, shares issued (in shares)	48,910,232	48,852,193
Common Stock, shares outstanding (in shares)	47,544,584	47,486,545
Treasury Stock
Treasury stock, shares	1,365,648	1,365,648
Series A Nonconvertible Preferred Stock [Member]
Shareholders' Equity A Nonconvertible Preferred Stock
Preferred Stock, shares issued (in shares)	200,000	200,000
Preferred Stock, shares outstanding (in shares)	200,000	200,000
Preferred Stock, liquidation value per share (in dollars per share)	$ 7.50	$ 7.50
Preferred Stock, liquidation value	$ 1,500,000	$ 1,500,000