Convertible Debt and Notes Payable (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Direct Financing Lease, Lease Income [Table Text Block]

For the years ended December 31, 2019, 2018 and 2017, quantitative information regarding the Company's finance lease obligations reflected in the accompanying consolidated statement of operations, the supplemental cash flow information and certain other information related to finance leases were as follows:

	Year Ended December 31,
	2019		2018
	(dollars in thousands)
Lease cost
Finance lease cost:
Amortization of finance lease right-of-use assets	$	1,266	$	1,627
Interest on lease liabilities	227		231
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	227		231
Financing cash flows from finance leases	$	1,266	$	2,186

Schedule of Debt and Capital Lease Obligations

As of December 31, 2019 and 2018, the Company's outstanding debt was as follows:

	As of December 31,
	2019		2018
	(dollars in thousands)
Convertible debt	$	118,688	$	134,489
Notes payable	306,818		229,740
Term loan	32,180		28,200
Other notes payable	2,516		—
Finance lease obligations	3,937		5,025
	$	464,139	$	397,454

Schedule of Maturities of Debt and Future Minimum Lease Payments for Capital Leases

Annual scheduled maturities of debt and minimum payments (of principal and interest) for all debt outstanding as of December 31, 2019, are as follows:

	Convertible Debt		Notes Payable		Term Loan		Other Notes Payable		Finance Lease Obligation
	(dollars in thousands)
2020	$	4,050	$	23,548	$	33,126	$	593	$	1,290
2021	4,050		23,548		—		593		1,398
2022	139,050		23,548		—		593		1,166
2023	—		23,548		—		593		411
2024	—		98,721		—		543		11
Thereafter	—		334,304		—		—		—
Subtotal	147,150		527,217		33,126		2,915		4,276
Less (a)	(28,462)		(220,399)		(946)		(399)		(339)
Total	$	118,688	$	306,818	$	32,180	$	2,516	$	3,937

(a)Amount necessary to reduce net minimum payments to present value calculated at the Company's implicit rate at inception. This amount also includes capitalized debt costs and the unamortized discount on the convertible debt.

Schedule of Line of Credit Facilities

As of December 31, 2019, the Company has the following six irrevocable letters of credit, related to leased office space, for which there is cash collateral pledged, which the Company pays a fee on the stated amount of the letter of credit. The Company also has pledged collateral for reinsurance agreements which amounted to $2.0 million as of December 31, 2019, and $1.0 million as of December 31, 2018, which are released annually between March 2020 and March 2023 based on the policy periods covered by the reinsurance agreements.

Location	Amount		Maturity
	(dollars in thousands)
Boston	$	382	March 2020
New York	$	359	April 2020
New York	$	398	October 2020
New York	$	1,125	October 2020
New York	$	1,629	November 2020
San Francisco	$	716	October 2025