CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Current assets
Cash and cash equivalents ($125,165, $94,359 and $71,328 related to consolidated construction joint ventures (“CCJVs”))	$ 230,259	$ 233,711	$ 185,516
Short-term marketable securities	35,010	67,775	47,814
Receivables, net ($26,142, $52,031 and $51,079 related to CCJVs)	618,070	479,791	627,081
Contract assets ($20,968, $0 and $0 related to CCJVs)	213,989	0	0
Costs and estimated earnings in excess of billings ($0, $1,437 and $3,035 related to CCJVs)	0	103,965	94,527
Inventories	90,789	62,497	62,059
Assets held for sale	62,988	0	0
Equity in construction joint ventures	273,993	247,826	242,358
Other current assets ($11,361, $10,384 and $6,033 related to CCJVs)	32,185	36,513	26,612
Total current assets	1,557,283	1,232,078	1,285,967
Property and equipment, net ($36,061, $38,361 and $33,754 related to CCJVs)	560,618	407,418	412,174
Long-term marketable securities	46,093	65,015	69,991
Investments in affiliates	84,840	38,469	39,946
Goodwill	244,696	53,799	53,799
Deferred income taxes, net	6,408	0	0
Other noncurrent assets	143,910	75,199	85,411
Total assets	2,643,848	1,871,978	1,947,288
Current liabilities
Current maturities of long-term debt	116,796	46,048	14,796
Accounts payable ($33,426, $34,795 and $27,443 related to CCJVs)	316,917	237,673	286,913
Contract liabilities ($67,139, $0 and $0 related to CCJVs)	117,759	0	0
Billings in excess of costs and estimated earnings ($0, $37,701 and $38,581 related to CCJVs)	0	135,146	168,707
Accrued expenses and other current liabilities ($1,975, $2,126 and $1,354 related to CCJVs)	296,033	236,407	246,775
Total current liabilities	847,505	655,274	717,191
Long-term debt	316,926	178,453	225,922
Deferred income taxes, net	5,589	1,361	5,932
Other long-term liabilities	67,429	44,085	46,435
Commitments and contingencies	0	0	0
Equity
Preferred stock, $0.01 par value, authorized 3,000,000 shares, none outstanding	0	0	0
Common stock, $0.01 par value, authorized 150,000,000 shares; issued and outstanding: 46,897,092 shares as of September 30, 2018, 39,871,314 shares as of December 31, 2017 and 39,850,587 shares as of September 30, 2017	469	399	399
Additional paid-in capital	572,046	160,376	157,734
Accumulated other comprehensive income	1,841	634	240
Retained earnings	786,936	783,699	756,183
Total Granite Construction Incorporated shareholders’ equity	1,361,292	945,108	914,556
Non-controlling interests	45,107	47,697	37,252
Total equity	1,406,399	992,805	951,808
Total liabilities and equity	$ 2,643,848	$ 1,871,978	$ 1,947,288