Debt (Schedule Of Interest Expense By Debt Instrument) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Instrument [Line Items]
Interest expense, net	$ 2,605	$ 1,854
Junior subordinated notes [Member]
Debt Instrument [Line Items]
Interest expense, net	821	880
2020 Senior Notes [Member]
Debt Instrument [Line Items]
Interest expense, net	89
2017 Convertible Note [Member]
Debt Instrument [Line Items]
Interest expense, net	371	360
2013 Convertible Notes / 2019 Senior Notes [Member]
Debt Instrument [Line Items]
Interest expense, net	119	133
2018 FT LOC/2019 FT Revolver [Member]
Debt Instrument [Line Items]
Interest expense, net	152	92
Redeemable Financial Instrument - DGC Family Fintech Trust / CBF [Member]
Debt Instrument [Line Items]
Interest expense, net	690	148
Redeemable Financial Instrument - JKD Capital Partners I LTD [Member]
Debt Instrument [Line Items]
Interest expense, net	440	278
Redeemable Financial Instrument - ViaNova Capital Group, LLC [Member]
Debt Instrument [Line Items]
Interest adjustment	$ (77)	$ (37)