Investments (Tables)

9 Months Ended

Sep. 30, 2017

Investments, All Other Investments [Abstract]

Schedule of Cost and Equity Method Investments

The following table summarizes the Company's investments (dollars in thousands):

	September 30, 2017		Percent Ownership of Voting Stock			December 31, 2016		Percent Ownership of Voting Stock
Available-for-sale securities:
Convertible debt securities	$	11,232				$	10,038
Redeemable preferred shares	15,552		19%	to	25%	17,444		19%	to	25%
Total available-for-sale securities	26,784					27,482
Cost method investments	25,236		1%	to	19%	31,816		1%	to	19%
Fair value option investments	77,484		10%	to	24%	82,584		41%
Total investments	$	129,504				$	141,882

Schedule of Available-for-sale Securities Reconciliation

The following table summarizes the amortized cost, gross unrealized gain, gross unrealized loss and fair value of the Company's available-for-sale securities as of September 30, 2017 and December 31, 2016, respectively (in thousands):

	September 30, 2017									December 31, 2016
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss (1)			Fair Value		Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss (1)			Fair Value
Available-for-sale securities:
Convertible debt securities	$	10,009	$	1,333	$	(110	)	$	11,232	$	8,453	$	1,691	$	(106	)	$	10,038
Redeemable preferred shares	18,375		—		(2,823		)	15,552		18,375		—		(931		)	17,444
Total available-for-sale securities	$	28,384	$	1,333	$	(2,933	)	$	26,784	$	26,828	$	1,691	$	(1,037	)	$	27,482

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