Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 282,000	$ 224,000
Trade, less allowance of $2,224 and $1,335, respectively	63,350,000	59,055,000
Other	3,814,000	3,028,000
Inventories	1,461,000	1,660,000
Prepaid expenses and deposits	10,393,000	10,112,000
Marketable equity securities	27,549,000	26,664,000
Income taxes refundable	1,876,000	1,499,000
Total current assets	108,725,000	102,242,000
PROPERTY AND EQUIPMENT:
Land	5,596,000	5,374,000
Structures and improvements	19,547,000	18,927,000
Revenue equipment	457,142,000	375,817,000
Office furniture and equipment	10,040,000	9,761,000
Total property and equipment	492,325,000	409,879,000
Accumulated depreciation	(137,738,000)	(122,935,000)
Net property and equipment	354,587,000	286,944,000
OTHER ASSETS	2,754,000	2,999,000
TOTAL ASSETS	466,066,000	392,185,000
CURRENT LIABILITIES:
Accounts payable	20,002,000	19,645,000
Accrued expenses and other liabilities	23,497,000	17,609,000
Current maturities of long-term debt	63,908,000	73,641,000
Total current liabilities	107,407,000	110,895,000
Long-term debt—less current portion	157,315,000	98,995,000
Deferred income taxes	61,897,000	54,691,000
Total liabilities	326,619,000	264,581,000
COMMITMENTS AND CONTINGENCIES (Note 17)
STOCKHOLDERS’ EQUITY
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued
Common stock, $.01 par value, 40,000,000 shares authorized; 11,612,144 and 11,529,124 shares issued; 5,956,558 and 6,160,889 shares outstanding at December 31, 2018 and 2017, respectively	116,000	115,000
Additional paid-in capital	82,776,000	81,559,000
Accumulated other comprehensive income		7,444,000
Treasury stock, at cost; 5,655,586 and 5,368,235 shares at December 31, 2018 and 2017, respectively	(142,552,000)	(129,183,000)
Retained earnings	199,107,000	167,669,000
Total stockholders’ equity	139,447,000	127,604,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 466,066,000	$ 392,185,000

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682