Strategic Investments - Summarized Financial Information (Details) - Cash Converters International Limited - USD ($) $ in Thousands	18 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Summary of financial information for Cash Converters International Limited
Current assets	$ 203,664	$ 158,235
Non-current assets	151,189	141,218
Total assets	354,853	299,453
Current liabilities	128,731	70,468
Non-current liabilities	14,559	48,181
Shareholders’ equity	211,563	180,804
Total liabilities and shareholders’ equity	354,853	299,453
Gross revenues	95,784	105,816
Gross profit	32,572	38,533
Net profit	$ 7,292	$ 8,633