Note 12 - Investments in Affiliates - Summarized Balance Sheet Information for Equity Method Investments (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Current assets		$ 140,487	$ 141,930	$ 138,887
Noncurrent assets		168,715	170,172	168,402
Total assets		309,202	312,102	307,289
Current liabilities		61,738	55,816	71,940
Long-term liabilities	[1]	60,230	63,098	46,961
Total liabilities		121,968	118,914	118,901
Net assets		187,234	193,188	188,388
Granite’s share of net assets		$ 84,914	$ 84,354	$ 84,840

[1] The balance primarily relates to debt associated with our real estate investments.