Income Tax (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Income Tax [Abstract]
Foreign withholding tax expense	$ 930,000
Accrued income taxes	13,100,000
Accrued income taxes, current	5,900,000
Non-current tax liabilities	7,200,000
Accrued income taxes, current judgment	4,400,000
Unrecognized tax benefits	2,700,000
Interest balance	5,500,000	5,500,000
Increase (decrease) to gross unrecognized tax benefits	(1,100,000)	3,700,000
Impact of effective tax rate if recognized		2,700,000
Uncertain tax position probable changes in next 12 months, minimum	100,000
Uncertain tax position probable changes in next 12 months, maximum	$ 1,000,000