CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 53,900,000	$ 44,943,000
Finite-Lived Intangible Assets, Accumulated Amortization	127,323,000	111,890,000
Other Finite-Lived Intangible Assets, Accumulated Amortization	$ 4,420,000	$ 3,384,000
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)	48,847,733	48,681,524
Common Stock, shares outstanding (in shares)	47,482,085	47,319,887
Treasury Stock
Treasury stock, shares	1,365,648	1,361,637
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