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Consolidated Balance Sheet by Industry Segment (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Mar. 31, 2013
Jun. 30, 2012
Mar. 31, 2012
ASSETS:        
Cash and cash equivalents $ 552,587 $ 463,744 $ 566,315 $ 357,180
Reinsurance recoverables and trade receivables, net 284,518 261,789    
Inventories, net 58,304 56,396    
Prepaid expenses 43,378 57,451    
Investments, fixed maturities and marketable equities 1,117,008 1,095,338    
Investments, other 231,418 241,765    
Deferred policy acquisition costs, net 97,823 93,043    
Other assets 104,744 99,986    
Related party assets 151,127 182,035    
Subtotal assets 2,640,907 2,551,547    
Property, plant and equipment, at cost:        
Land 348,234 333,228    
Buildings and improvements 1,278,622 1,197,875    
Furniture and equipment 313,796 311,142    
Property, plant and equipment (gross) 4,535,777 4,314,409    
Less: Accumulated depreciation (1,597,922) (1,559,355)    
Total property, plant and equipment 2,937,855 2,755,054    
Total assets 5,578,762 5,306,601 4,838,836  
Liabilities:        
Accounts payable and accrued expenses 366,302 358,491    
Notes, loans and leases payable 1,737,277 1,661,845    
Policy benefits and losses, claims and loss expenses payable 1,115,821 1,115,048    
Liabilities from investment contracts 538,777 510,789    
Other policyholders' funds and liabilities 7,114 7,294    
Deferred income 37,752 30,217    
Deferred income taxes 429,428 393,658    
Total liabilities 4,232,471 4,077,342    
Stockholders' equity:        
Additional paid-in capital 439,524 438,168    
Accumulated other comprehensive loss (20,099) (22,680)    
Retained earnings 1,595,598 1,482,630    
Unearned employee stock ownership plan shares (1,579) (1,706)    
Total stockholders' equity 1,346,291 1,229,259    
Total liabilities and stockholders' equity 5,578,762 5,306,601    
Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 331,433 317,476    
Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 2,263,692 2,154,688    
Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued          
Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued          
Series A common stock
       
Stockholders' equity:        
Common stock, value, issued          
Common stock
       
Stockholders' equity:        
Common stock, value, issued 10,497 10,497    
Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value (525,653) (525,653)    
Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value (151,997) (151,997)    
Operating Segments | Property and Casualty Insurance
       
ASSETS:        
Cash and cash equivalents 10,578 [1] 14,120 [2] 13,165 [3] 22,542 [3]
Reinsurance recoverables and trade receivables, net 185,490 [1] 186,010 [2]    
Inventories, net 0 [1] 0 [2]    
Prepaid expenses 0 [1] 0 [2]    
Investments, fixed maturities and marketable equities 169,730 [1] 160,455 [2]    
Investments, other 66,720 [1] 65,212 [2]    
Deferred policy acquisition costs, net 0 [1] 0 [2]    
Other assets 1,017 [1] 1,212 [2]    
Related party assets 8,950 [1] 8,846 [2]    
Subtotal assets 442,485 [1] 435,855 [2]    
Investments in subsidiaries 0 [1] 0 [2]    
Property, plant and equipment, at cost:        
Land 0 [1] 0 [2]    
Buildings and improvements 0 [1] 0 [2]    
Furniture and equipment 0 [1] 0 [2]    
Property, plant and equipment (gross) 0 [1] 0 [2]    
Less: Accumulated depreciation 0 [1] 0 [2]    
Total property, plant and equipment 0 [1] 0 [2]    
Total assets 442,485 [1] 435,855 [2]    
Liabilities:        
Accounts payable and accrued expenses 0 [1] 0 [2]    
Notes, loans and leases payable 0 [1] 0 [2]    
Policy benefits and losses, claims and loss expenses payable 331,510 [1] 330,184 [2]    
Liabilities from investment contracts 0 [1] 0 [2]    
Other policyholders' funds and liabilities 2,656 [1] 3,157 [2]    
Deferred income 0 [1] 0 [2]    
Deferred income taxes (34,805) [1] (36,241) [2]    
Related party liabilities 2,319 [1] 1,844 [2]    
Total liabilities 301,680 [1] 298,944 [2]    
Stockholders' equity:        
Additional paid-in capital 91,120 [1] 91,120 [2]    
Accumulated other comprehensive loss 5,609 [1] 4,568 [2]    
Retained earnings 40,775 [1] 37,922 [2]    
Unearned employee stock ownership plan shares 0 [1] 0 [2]    
Total stockholders' equity 140,805 [1] 136,911 [2]    
Total liabilities and stockholders' equity 442,485 [1] 435,855 [2]    
Operating Segments | Property and Casualty Insurance | Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 [1] 0 [2]    
Operating Segments | Property and Casualty Insurance | Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 [1] 0 [2]    
Operating Segments | Property and Casualty Insurance | Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 [1] 0 [2]    
Operating Segments | Property and Casualty Insurance | Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 [1] 0 [2]    
Operating Segments | Property and Casualty Insurance | Series A common stock
       
Stockholders' equity:        
Common stock, value, issued 0 [1] 0 [2]    
Operating Segments | Property and Casualty Insurance | Common stock
       
Stockholders' equity:        
Common stock, value, issued 3,301 [1] 3,301 [2]    
Operating Segments | Property and Casualty Insurance | Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 [1] 0 [2]    
Operating Segments | Property and Casualty Insurance | Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 [1] 0 [2]    
Operating Segments | Life Insurance
       
ASSETS:        
Cash and cash equivalents 35,207 [1] 22,064 [2] 33,458 [3] 25,410 [3]
Reinsurance recoverables and trade receivables, net 34,674 [1] 32,520 [2]    
Inventories, net 0 [1] 0 [2]    
Prepaid expenses 0 [1] 0 [2]    
Investments, fixed maturities and marketable equities 925,347 [1] 913,655 [2]    
Investments, other 129,111 [1] 125,900 [2]    
Deferred policy acquisition costs, net 97,823 [1] 93,043 [2]    
Other assets 241 [1] 157 [2]    
Related party assets 489 [1] 514 [2]    
Subtotal assets 1,222,892 [1] 1,187,853 [2]    
Investments in subsidiaries 0 [1] 0 [2]    
Property, plant and equipment, at cost:        
Land 0 [1] 0 [2]    
Buildings and improvements 0 [1] 0 [2]    
Furniture and equipment 0 [1] 0 [2]    
Property, plant and equipment (gross) 0 [1] 0 [2]    
Less: Accumulated depreciation 0 [1] 0 [2]    
Total property, plant and equipment 0 [1] 0 [2]    
Total assets 1,222,892 [1] 1,187,853 [2]    
Liabilities:        
Accounts payable and accrued expenses 5,706 [1] 8,139 [2]    
Notes, loans and leases payable 0 [1] 0 [2]    
Policy benefits and losses, claims and loss expenses payable 409,913 [1] 404,040 [2]    
Liabilities from investment contracts 538,777 [1] 510,789 [2]    
Other policyholders' funds and liabilities 4,458 [1] 4,137 [2]    
Deferred income 0 [1] 0 [2]    
Deferred income taxes 19,985 [1] 17,810 [2]    
Related party liabilities 441 [1] 208 [2]    
Total liabilities 979,280 [1] 945,123 [2]    
Stockholders' equity:        
Additional paid-in capital 26,271 [1] 26,271 [2]    
Accumulated other comprehensive loss 35,794 [1] 37,567 [2]    
Retained earnings 179,047 [1] 176,392 [2]    
Unearned employee stock ownership plan shares 0 [1] 0 [2]    
Total stockholders' equity 243,612 [1] 242,730 [2]    
Total liabilities and stockholders' equity 1,222,892 [1] 1,187,853 [2]    
Operating Segments | Life Insurance | Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 [1] 0 [2]    
Operating Segments | Life Insurance | Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 [1] 0 [2]    
Operating Segments | Life Insurance | Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 [1] 0 [2]    
Operating Segments | Life Insurance | Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 [1] 0 [2]    
Operating Segments | Life Insurance | Series A common stock
       
Stockholders' equity:        
Common stock, value, issued 0 [1] 0 [2]    
Operating Segments | Life Insurance | Common stock
       
Stockholders' equity:        
Common stock, value, issued 2,500 [1] 2,500 [2]    
Operating Segments | Life Insurance | Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 [1] 0 [2]    
Operating Segments | Life Insurance | Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 [1] 0 [2]    
Operating Segments | Moving and Storage Operating Segment
       
ASSETS:        
Cash and cash equivalents 506,802 427,560 519,692 309,228
Reinsurance recoverables and trade receivables, net 64,354 43,259    
Inventories, net 58,304 56,396    
Prepaid expenses 43,378 57,451    
Investments, fixed maturities and marketable equities 21,931 21,228    
Investments, other 35,587 50,653    
Deferred policy acquisition costs, net 0 0    
Other assets 103,486 98,617    
Related party assets 159,395 184,740    
Subtotal assets 993,237 939,904    
Investments in subsidiaries 384,417 379,641    
Property, plant and equipment, at cost:        
Land 348,234 333,228    
Buildings and improvements 1,278,622 1,197,875    
Furniture and equipment 313,796 311,142    
Property, plant and equipment (gross) 4,535,777 4,314,409    
Less: Accumulated depreciation (1,597,922) (1,559,355)    
Total property, plant and equipment 2,937,855 2,755,054    
Total assets 4,315,509 4,074,599    
Liabilities:        
Accounts payable and accrued expenses 360,596 350,352    
Notes, loans and leases payable 1,737,277 1,661,845    
Policy benefits and losses, claims and loss expenses payable 374,398 380,824    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 0 0    
Deferred income 37,752 30,217    
Deferred income taxes 444,248 412,089    
Related party liabilities 14,947 10,013    
Total liabilities 2,969,218 2,845,340    
Stockholders' equity:        
Additional paid-in capital 439,734 438,378    
Accumulated other comprehensive loss (20,099) (22,680)    
Retained earnings 1,595,388 1,482,420    
Unearned employee stock ownership plan shares (1,579) (1,706)    
Total stockholders' equity 1,346,291 1,229,259    
Total liabilities and stockholders' equity 4,315,509 4,074,599    
Operating Segments | Moving and Storage Operating Segment | Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 331,433 317,476    
Operating Segments | Moving and Storage Operating Segment | Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 2,263,692 2,154,688    
Operating Segments | Moving and Storage Operating Segment | Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Series A common stock
       
Stockholders' equity:        
Common stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Common stock
       
Stockholders' equity:        
Common stock, value, issued 10,497 10,497    
Operating Segments | Moving and Storage Operating Segment | Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value (525,653) (525,653)    
Operating Segments | Moving and Storage Operating Segment | Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value (151,997) (151,997)    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations
       
ASSETS:        
Cash and cash equivalents 0 0 0 0
Reinsurance recoverables and trade receivables, net 0 0    
Inventories, net 0 0    
Prepaid expenses 0 0    
Investments, fixed maturities and marketable equities 0 0    
Investments, other 0 0    
Deferred policy acquisition costs, net 0 0    
Other assets 0 0    
Related party assets (1,007,825) (975,683)    
Subtotal assets (1,007,825) (975,683)    
Investments in subsidiaries 43,253 140,100    
Property, plant and equipment, at cost:        
Land 0 0    
Buildings and improvements 0 0    
Furniture and equipment 0 0    
Property, plant and equipment (gross) 0 0    
Less: Accumulated depreciation 0 0    
Total property, plant and equipment 0 0    
Total assets (964,572) (835,583)    
Liabilities:        
Accounts payable and accrued expenses 0 0    
Notes, loans and leases payable 0 0    
Policy benefits and losses, claims and loss expenses payable 0 0    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 0 0    
Deferred income 0 0    
Deferred income taxes 0 0    
Related party liabilities (1,007,825) (975,683)    
Total liabilities (1,007,825) (975,683)    
Stockholders' equity:        
Additional paid-in capital (269,171) (269,171)    
Accumulated other comprehensive loss 59,765 62,325    
Retained earnings 252,661 346,948    
Unearned employee stock ownership plan shares 0 0    
Total stockholders' equity 43,253 140,100    
Total liabilities and stockholders' equity (964,572) (835,583)    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations | Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations | Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations | Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations | Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations | Series A common stock
       
Stockholders' equity:        
Common stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations | Common stock
       
Stockholders' equity:        
Common stock, value, issued (2) (2)    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations | Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 0    
Operating Segments | Moving and Storage Operating Segment | Moving and Storage Operating Eliminations | Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 0    
Operating Segments | Moving and Storage Operating Segment | AMERCO
       
ASSETS:        
Cash and cash equivalents 371,619 327,119 200,250 201,502
Reinsurance recoverables and trade receivables, net 0 0    
Inventories, net 0 0    
Prepaid expenses 0 22,475    
Investments, fixed maturities and marketable equities 21,931 21,228    
Investments, other 0 0    
Deferred policy acquisition costs, net 0 0    
Other assets 118 118    
Related party assets 1,064,653 1,032,663    
Subtotal assets 1,458,321 1,403,603    
Investments in subsidiaries 341,164 239,541    
Property, plant and equipment, at cost:        
Land 0 0    
Buildings and improvements 0 0    
Furniture and equipment 135 136    
Property, plant and equipment (gross) 135 136    
Less: Accumulated depreciation (116) (116)    
Total property, plant and equipment 19 20    
Total assets 1,799,504 1,643,164    
Liabilities:        
Accounts payable and accrued expenses 7,386 110    
Notes, loans and leases payable 0 0    
Policy benefits and losses, claims and loss expenses payable 0 0    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 0 0    
Deferred income 0 0    
Deferred income taxes 444,248 412,089    
Related party liabilities 0 0    
Total liabilities 451,634 412,199    
Stockholders' equity:        
Additional paid-in capital 439,734 438,378    
Accumulated other comprehensive loss (20,099) (22,680)    
Retained earnings 1,595,388 1,482,420    
Unearned employee stock ownership plan shares 0 0    
Total stockholders' equity 1,347,870 1,230,965    
Total liabilities and stockholders' equity 1,799,504 1,643,164    
Operating Segments | Moving and Storage Operating Segment | AMERCO | Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Operating Segments | Moving and Storage Operating Segment | AMERCO | Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Operating Segments | Moving and Storage Operating Segment | AMERCO | Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | AMERCO | Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | AMERCO | Series A common stock
       
Stockholders' equity:        
Common stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | AMERCO | Common stock
       
Stockholders' equity:        
Common stock, value, issued 10,497 10,497    
Operating Segments | Moving and Storage Operating Segment | AMERCO | Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value (525,653) (525,653)    
Operating Segments | Moving and Storage Operating Segment | AMERCO | Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value (151,997) (151,997)    
Operating Segments | Moving and Storage Operating Segment | U-Haul
       
ASSETS:        
Cash and cash equivalents 133,684 98,926 318,687 106,951
Reinsurance recoverables and trade receivables, net 64,354 43,259    
Inventories, net 58,304 56,396    
Prepaid expenses 42,679 34,956    
Investments, fixed maturities and marketable equities 0 0    
Investments, other 0 100    
Deferred policy acquisition costs, net 0 0    
Other assets 71,018 69,671    
Related party assets 102,558 127,751    
Subtotal assets 472,597 431,059    
Investments in subsidiaries 0 0    
Property, plant and equipment, at cost:        
Land 54,144 81,421    
Buildings and improvements 188,694 184,053    
Furniture and equipment 295,830 292,621    
Property, plant and equipment (gross) 3,133,793 3,030,259    
Less: Accumulated depreciation (1,220,985) (1,185,796)    
Total property, plant and equipment 1,912,808 1,844,463    
Total assets 2,385,405 2,275,522    
Liabilities:        
Accounts payable and accrued expenses 348,957 345,864    
Notes, loans and leases payable 940,975 881,766    
Policy benefits and losses, claims and loss expenses payable 374,398 380,824    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 0 0    
Deferred income 37,752 30,217    
Deferred income taxes 0 0    
Related party liabilities 590,184 638,448    
Total liabilities 2,292,266 2,277,119    
Stockholders' equity:        
Additional paid-in capital 121,230 121,230    
Accumulated other comprehensive loss (59,765) (62,325)    
Retained earnings 33,252 (58,797)    
Unearned employee stock ownership plan shares (1,579) (1,706)    
Total stockholders' equity 93,139 (1,597)    
Total liabilities and stockholders' equity 2,385,405 2,275,522    
Operating Segments | Moving and Storage Operating Segment | U-Haul | Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 331,433 317,476    
Operating Segments | Moving and Storage Operating Segment | U-Haul | Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 2,263,692 2,154,688    
Operating Segments | Moving and Storage Operating Segment | U-Haul | Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | U-Haul | Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | U-Haul | Series A common stock
       
Stockholders' equity:        
Common stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | U-Haul | Common stock
       
Stockholders' equity:        
Common stock, value, issued 1 1    
Operating Segments | Moving and Storage Operating Segment | U-Haul | Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 0    
Operating Segments | Moving and Storage Operating Segment | U-Haul | Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 0    
Operating Segments | Moving and Storage Operating Segment | Real Estate
       
ASSETS:        
Cash and cash equivalents 1,499 1,515 755 775
Reinsurance recoverables and trade receivables, net 0 0    
Inventories, net 0 0    
Prepaid expenses 699 20    
Investments, fixed maturities and marketable equities 0 0    
Investments, other 35,587 50,553    
Deferred policy acquisition costs, net 0 0    
Other assets 32,350 28,828    
Related party assets 9 9    
Subtotal assets 70,144 80,925    
Investments in subsidiaries 0 0    
Property, plant and equipment, at cost:        
Land 294,090 251,807    
Buildings and improvements 1,089,928 1,013,822    
Furniture and equipment 17,831 18,385    
Property, plant and equipment (gross) 1,401,849 1,284,014    
Less: Accumulated depreciation (376,821) (373,443)    
Total property, plant and equipment 1,025,028 910,571    
Total assets 1,095,172 991,496    
Liabilities:        
Accounts payable and accrued expenses 4,253 4,378    
Notes, loans and leases payable 796,302 780,079    
Policy benefits and losses, claims and loss expenses payable 0 0    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 0 0    
Deferred income 0 0    
Deferred income taxes 0 0    
Related party liabilities 432,588 347,248    
Total liabilities 1,233,143 1,131,705    
Stockholders' equity:        
Additional paid-in capital 147,941 147,941    
Accumulated other comprehensive loss 0 0    
Retained earnings (285,913) (288,151)    
Unearned employee stock ownership plan shares 0 0    
Total stockholders' equity (137,971) (140,209)    
Total liabilities and stockholders' equity 1,095,172 991,496    
Operating Segments | Moving and Storage Operating Segment | Real Estate | Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Operating Segments | Moving and Storage Operating Segment | Real Estate | Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Operating Segments | Moving and Storage Operating Segment | Real Estate | Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Real Estate | Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Real Estate | Series A common stock
       
Stockholders' equity:        
Common stock, value, issued 0 0    
Operating Segments | Moving and Storage Operating Segment | Real Estate | Common stock
       
Stockholders' equity:        
Common stock, value, issued 1 1    
Operating Segments | Moving and Storage Operating Segment | Real Estate | Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 0    
Operating Segments | Moving and Storage Operating Segment | Real Estate | Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 0    
Eliminations
       
ASSETS:        
Cash and cash equivalents 0 0 0 0
Reinsurance recoverables and trade receivables, net 0 0    
Inventories, net 0 0    
Prepaid expenses 0 0    
Investments, fixed maturities and marketable equities 0 0    
Investments, other 0 0    
Deferred policy acquisition costs, net 0 0    
Other assets 0 0    
Related party assets (17,707) [4] (12,065) [4]    
Subtotal assets (17,707) (12,065)    
Investments in subsidiaries (384,417) [5] (379,641) [5]    
Property, plant and equipment, at cost:        
Land 0 0    
Buildings and improvements 0 0    
Furniture and equipment 0 0    
Property, plant and equipment (gross) 0 0    
Less: Accumulated depreciation 0 0    
Total property, plant and equipment 0 0    
Total assets (402,124) (391,706)    
Liabilities:        
Accounts payable and accrued expenses 0 0    
Notes, loans and leases payable 0 0    
Policy benefits and losses, claims and loss expenses payable 0 0    
Liabilities from investment contracts 0 0    
Other policyholders' funds and liabilities 0 0    
Deferred income 0 0    
Deferred income taxes 0 0    
Related party liabilities (17,707) [4] (12,065) [4],[6],[7]    
Total liabilities (17,707) (12,065)    
Stockholders' equity:        
Additional paid-in capital (117,601) [5] (117,601) [5]    
Accumulated other comprehensive loss (41,403) [5] (42,135) [5]    
Retained earnings (219,612) [5] (214,104) [5]    
Unearned employee stock ownership plan shares 0 0    
Total stockholders' equity (384,417) (379,641)    
Total liabilities and stockholders' equity (402,124) (391,706)    
Eliminations | Rental trailers and other rental equipment
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Eliminations | Rental trucks
       
Property, plant and equipment, at cost:        
Property subject to or available for operating lease, gross 0 0    
Eliminations | Series A preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Eliminations | Series B preferred stock
       
Stockholders' equity:        
Preferred stock, value, issued 0 0    
Eliminations | Series A common stock
       
Stockholders' equity:        
Common stock, value, issued 0 0    
Eliminations | Common stock
       
Stockholders' equity:        
Common stock, value, issued (5,801) [5] (5,801) [5],[6],[7]    
Eliminations | Cost of common shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value 0 0    
Eliminations | Cost of preferred shares in treasury, net
       
Stockholders' equity:        
Treasury stock, value $ 0 $ 0    
[1] Balances as of March 31, 2013
[2] Balances as of December 31, 2012
[3] Balance for the period ended March 31, 2012
[4] Eliminate intercompany receivables and payables
[5] Eliminate investment in subsidiaries
[6] Eliminate intercompany premiums
[7] Eliminate intercompany lease / interest income