Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Detail) (USD $) | 3 Months Ended | 6 Months Ended | |
In Thousands, unless otherwise specified | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013 |
Segment Reporting Information [Line Items] | ' | ' | ' | ' | ' |
Rental Revenues | $65,809 | $63,043 | $128,239 | $123,644 | ' |
Rental Related Services Revenues | 15,146 | 12,661 | 28,658 | 23,506 | ' |
Sales and Other Revenues | ' | ' | 26,408 | 28,748 | ' |
Total Revenues | 95,745 | 87,156 | 183,305 | 175,898 | ' |
Depreciation of Rental Equipment | 17,924 | 16,626 | 35,821 | 33,228 | ' |
Gross Profit | 42,079 | 40,169 | 80,717 | 79,196 | ' |
Selling and Administrative Expenses | 23,840 | 21,792 | 47,251 | 43,430 | ' |
Income (Loss) from Operations | 18,239 | 18,377 | 33,466 | 35,766 | ' |
Interest Expense (Income) Allocation | ' | ' | 4,538 | 4,360 | ' |
Gain on Sale of Property, Plant and Equipment | 812 | ' | 812 | ' | ' |
Income (Loss) before Provision for Income Taxes | 16,794 | 16,197 | 29,730 | 31,354 | ' |
Rental Equipment Acquisitions | ' | ' | 71,656 | 60,029 | ' |
Accounts Receivable, net (period end) | 89,084 | 87,286 | 89,084 | 87,286 | 87,650 |
Rental Equipment, at cost (period end) | 1,184,612 | 1,104,218 | 1,184,612 | 1,104,218 | 1,144,168 |
Rental Equipment, net book value (period end) | 795,532 | 737,636 | 795,532 | 737,636 | 767,010 |
Mobile Modular [Member] | ' | ' | ' | ' | ' |
Segment Reporting Information [Line Items] | ' | ' | ' | ' | ' |
Rental Revenues | ' | ' | 44,212 | 39,288 | ' |
Rental Related Services Revenues | ' | ' | 15,328 | 12,491 | ' |
Sales and Other Revenues | ' | ' | 11,415 | 6,715 | ' |
Total Revenues | ' | ' | 70,955 | 58,494 | ' |
Depreciation of Rental Equipment | ' | ' | 7,842 | 7,089 | ' |
Gross Profit | ' | ' | 25,774 | 22,894 | ' |
Selling and Administrative Expenses | ' | ' | 19,830 | 17,371 | ' |
Income (Loss) from Operations | ' | ' | 5,944 | 5,523 | ' |
Interest Expense (Income) Allocation | ' | ' | 2,290 | 2,158 | ' |
Gain on Sale of Property, Plant and Equipment | ' | ' | 341 | ' | ' |
Income (Loss) before Provision for Income Taxes | ' | ' | 3,995 | 3,365 | ' |
Rental Equipment Acquisitions | ' | ' | 38,177 | 21,521 | ' |
Accounts Receivable, net (period end) | 42,947 | 37,573 | 42,947 | 37,573 | ' |
Rental Equipment, at cost (period end) | 626,457 | 570,352 | 626,457 | 570,352 | ' |
Rental Equipment, net book value (period end) | 443,086 | 397,702 | 443,086 | 397,702 | ' |
Utilization (period end) | ' | ' | 71.60% | 67.60% | ' |
Average Utilization | ' | ' | 70.20% | 66.70% | ' |
TRS-RenTelco [Member] | ' | ' | ' | ' | ' |
Segment Reporting Information [Line Items] | ' | ' | ' | ' | ' |
Rental Revenues | ' | ' | 48,184 | 50,179 | ' |
Rental Related Services Revenues | ' | ' | 1,617 | 1,412 | ' |
Sales and Other Revenues | ' | ' | 11,977 | 14,252 | ' |
Total Revenues | ' | ' | 61,778 | 65,843 | ' |
Depreciation of Rental Equipment | ' | ' | 20,539 | 19,474 | ' |
Gross Profit | ' | ' | 28,138 | 31,010 | ' |
Selling and Administrative Expenses | ' | ' | 12,004 | 12,400 | ' |
Income (Loss) from Operations | ' | ' | 16,134 | 18,610 | ' |
Interest Expense (Income) Allocation | ' | ' | 1,053 | 1,089 | ' |
Gain on Sale of Property, Plant and Equipment | ' | ' | 276 | ' | ' |
Income (Loss) before Provision for Income Taxes | ' | ' | 15,347 | 17,469 | ' |
Rental Equipment Acquisitions | ' | ' | 18,387 | 22,655 | ' |
Accounts Receivable, net (period end) | 22,500 | 22,750 | 22,500 | 22,750 | ' |
Rental Equipment, at cost (period end) | 259,907 | 264,429 | 259,907 | 264,429 | ' |
Rental Equipment, net book value (period end) | 103,816 | 105,869 | 103,816 | 105,869 | ' |
Utilization (period end) | ' | ' | 62.20% | 63.30% | ' |
Average Utilization | ' | ' | 58.30% | 63.70% | ' |
Adler Tanks [Member] | ' | ' | ' | ' | ' |
Segment Reporting Information [Line Items] | ' | ' | ' | ' | ' |
Rental Revenues | ' | ' | 35,843 | 34,177 | ' |
Rental Related Services Revenues | ' | ' | 11,713 | 9,603 | ' |
Sales and Other Revenues | ' | ' | 769 | 1,354 | ' |
Total Revenues | ' | ' | 48,325 | 45,134 | ' |
Depreciation of Rental Equipment | ' | ' | 7,440 | 6,665 | ' |
Gross Profit | ' | ' | 26,060 | 24,557 | ' |
Selling and Administrative Expenses | ' | ' | 13,836 | 12,097 | ' |
Income (Loss) from Operations | ' | ' | 12,224 | 12,460 | ' |
Interest Expense (Income) Allocation | ' | ' | 1,284 | 1,213 | ' |
Gain on Sale of Property, Plant and Equipment | ' | ' | 195 | ' | ' |
Income (Loss) before Provision for Income Taxes | ' | ' | 11,135 | 11,247 | ' |
Rental Equipment Acquisitions | ' | ' | 15,092 | 15,853 | ' |
Accounts Receivable, net (period end) | 21,057 | 24,139 | 21,057 | 24,139 | ' |
Rental Equipment, at cost (period end) | 298,248 | 269,437 | 298,248 | 269,437 | ' |
Rental Equipment, net book value (period end) | 248,630 | 234,065 | 248,630 | 234,065 | ' |
Utilization (period end) | ' | ' | 61.50% | 68.70% | ' |
Average Utilization | ' | ' | 61.80% | 65.50% | ' |
Enviroplex [Member] | ' | ' | ' | ' | ' |
Segment Reporting Information [Line Items] | ' | ' | ' | ' | ' |
Rental Revenues | ' | ' | ' | ' | ' |
Rental Related Services Revenues | ' | ' | ' | ' | ' |
Sales and Other Revenues | ' | ' | 2,247 | 6,427 | ' |
Total Revenues | ' | ' | 2,247 | 6,427 | ' |
Depreciation of Rental Equipment | ' | ' | ' | ' | ' |
Gross Profit | ' | ' | 745 | 735 | ' |
Selling and Administrative Expenses | ' | ' | 1,581 | 1,562 | ' |
Income (Loss) from Operations | ' | ' | -836 | -827 | ' |
Interest Expense (Income) Allocation | ' | ' | -89 | -100 | ' |
Income (Loss) before Provision for Income Taxes | ' | ' | -747 | -727 | ' |
Rental Equipment Acquisitions | ' | ' | ' | ' | ' |
Accounts Receivable, net (period end) | 2,580 | 2,824 | 2,580 | 2,824 | ' |
Rental Equipment, at cost (period end) | ' | ' | ' | ' | ' |
Rental Equipment, net book value (period end) | ' | ' | ' | ' | ' |