Debt (Details) - USD ($)	Dec. 31, 2017	Apr. 13, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Short-term debt	$ 22,000,000	$ 90,000,000	$ 29,000,000
Current maturities of long-term debt	54,205,000		47,545,000
Long-term debt, less current maturities	418,339,000		397,065,000
Non-recourse
Debt Instrument [Line Items]
Short-term debt	0		0
Current maturities of long-term debt	0		0
Long-term debt, less current maturities	0		0
Recourse
Debt Instrument [Line Items]
Short-term debt	22,000,000		29,000,000
Current maturities of long-term debt	54,205,000		47,545,000
Long-term debt, less current maturities	$ 418,339,000		$ 397,065,000

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details