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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Summary of changes in loan origination liability
Changes in these liabilities were as follows ($000's omitted):
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2013
 
2012
 
2013
 
2012
Liabilities, beginning of period
$
154,421

 
$
120,711

 
$
164,280

 
$
128,330

Reserves provided
—

 
—

 
—

 
—

Payments
(8,220
)
 
(2,089
)
 
(18,079
)
 
(9,708
)
Liabilities, end of period
$
146,201

 
$
118,622

 
$
146,201

 
$
118,622
Summary of changes in warranty liability
Changes to warranty liabilities were as follows ($000’s omitted):
 
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2013
 
2012
 
2013
 
2012
Warranty liabilities, beginning of period
$
61,914

 
$
64,364

 
$
64,098

 
$
68,025

Reserves provided
15,322

 
12,593

 
36,079

 
32,014

Payments
(10,551
)
 
(10,976
)
 
(32,330
)
 
(34,336
)
Other adjustments
(1,602
)
 
(1,453
)
 
(2,764
)
 
(1,175
)
Warranty liabilities, end of period
$
65,083

 
$
64,528

 
$
65,083

 
$
64,528
Summary of changes in self-insurance liability
Changes in these liabilities were as follows ($000's omitted):
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2013
 
2012
 
2013
 
2012
Balance, beginning of period
$
708,142

 
$
733,042

 
$
721,284

 
$
739,029

Reserves provided
21,439

 
15,557

 
52,266

 
37,772

Payments
(37,983
)
 
(24,773
)
 
(81,952
)
 
(52,975
)
Balance, end of period
$
691,598

 
$
723,826

 
$
691,598

 
$
723,826