CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 36,368,000	$ 32,167,000
Finite-Lived Intangible Assets, Accumulated Amortization	91,312,000	70,714,000
Other Finite-Lived Intangible Assets, Accumulated Amortization	$ 2,000,000	$ 615,000
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)	100,000,000	100,000,000
Common Stock, shares issued (in shares)	48,476,034	48,270,990
Common Stock, shares outstanding (in shares)	47,118,171	46,913,127
Treasury Stock
Treasury stock, shares	1,357,863	1,357,863
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