Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Revenues	$ 259,162	$ 244,686	$ 735,353	$ 733,791
Cost of revenues:
Cost of revenues	165,136	156,561	476,315	482,814
Gross profit	94,026	88,125	259,038	250,977
Selling, general and administrative expenses	55,203	55,962	172,328	172,385
Merger breakup fee proceeds, net of merger costs	6,506		6,506
Gain on sales of property and equipment, net	2,325	927	4,431	2,301
Income from operations	47,654	33,090	97,647	80,893
Other income (expense):
Interest expense	(15,060)	(13,469)	(41,665)	(40,229)
Loss on early extinguishment of debt	(25,363)		(25,363)
Other, net	346	386	1,156	1,505
Total other expense, net	(40,077)	(13,083)	(65,872)	(38,724)
Income before provision for income taxes	7,577	20,007	31,775	42,169
Provision (Benefit) for income taxes	(885)	8,342	8,045	17,427
Net income	$ 8,462	$ 11,665	$ 23,730	$ 24,742
Net income per common share:
Basic	$ 0.24	$ 0.33	$ 0.67	$ 0.70
Diluted	$ 0.24	$ 0.33	$ 0.67	$ 0.70
Weighted average common shares outstanding:
Basic	35,543	35,424	35,494	35,373
Diluted	35,715	35,504	35,656	35,461
Dividends declared per common share outstanding	$ 0.275	$ 0.275	$ 0.825	$ 0.825
Rental Depreciation [Member]
Cost of revenues:
Cost of revenues	$ 43,255	$ 41,528	$ 125,996	$ 120,700
Rental Expense [Member]
Cost of revenues:
Cost of revenues	19,988	18,378	58,524	53,162
Operating Segments [Member]
Revenues:
Revenues	240,666	227,340	683,589	685,112
Cost of revenues:
Gross profit	93,006	87,770	258,056	250,427
Operating Segments [Member] | Equipment Rentals [Member]
Revenues:
Revenues	125,616	118,535	351,303	330,023
Cost of revenues:
Gross profit	62,373	58,629	166,783	156,161
Operating Segments [Member] | Equipment Rentals [Member] | Rental Depreciation [Member]
Cost of revenues:
Cost of revenues	43,255	41,528	125,996	120,700
Operating Segments [Member] | Equipment Rentals [Member] | Rental Expense [Member]
Cost of revenues:
Cost of revenues	19,988	18,378	58,524	53,162
Operating Segments [Member] | New Equipment Sales [Member]
Revenues:
Revenues	48,940	44,764	128,883	151,836
Cost of revenues:
Cost of revenues	43,609	40,147	114,440	135,152
Gross profit	5,331	4,617	14,443	16,684
Operating Segments [Member] | Used Equipment Sales [Member]
Revenues:
Revenues	22,250	20,630	75,219	71,973
Cost of revenues:
Cost of revenues	15,116	14,364	51,979	49,751
Gross profit	7,134	6,266	23,240	22,222
Operating Segments [Member] | Parts Sales [Member]
Revenues:
Revenues	27,763	27,335	81,063	81,958
Cost of revenues:
Cost of revenues	20,125	19,708	58,696	59,184
Gross profit	7,638	7,627	22,367	22,774
Operating Segments [Member] | Services Revenues [Member]
Revenues:
Revenues	16,097	16,076	47,121	49,322
Cost of revenues:
Cost of revenues	5,567	5,445	15,898	16,736
Gross profit	10,530	10,631	31,223	32,586
Other [Member]
Revenues:
Revenues	18,496	17,346	51,764	48,679
Cost of revenues:
Cost of revenues	17,476	16,991	50,782	48,129
Gross profit	$ 1,020	$ 355	$ 982	$ 550