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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2016
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
 
Six Months Ended
 
June 30,
 
June 30,
 
2016
 
2015
 
2016
 
2015
Liabilities, beginning of period
$
47,093

 
$
58,226

 
$
46,381

 
$
58,222

Reserves provided (released), net
(99
)
 
81

 
767

 
139

Payments
(11,049
)
 
(69
)
 
(11,203
)
 
(123
)
Liabilities, end of period
$
35,945

 
$
58,238

 
$
35,945

 
$
58,238
Summary of Changes in Warranty Liability
Changes to warranty liabilities were as follows ($000’s omitted):
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2016
 
2015
 
2016
 
2015
Warranty liabilities, beginning of period
$
60,936

 
$
57,401

 
$
61,360

 
$
65,389

Reserves provided
14,204

 
11,170

 
26,523

 
20,011

Payments
(13,101
)
 
(14,648
)
 
(25,844
)
 
(31,477
)
Other adjustments
(200
)
 
579

 
(200
)
 
579

Warranty liabilities, end of period
$
61,839

 
$
54,502

 
$
61,839

 
$
54,502
Summary of Changes in Self-Insurance Liability
Changes in these liabilities were as follows ($000's omitted):
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2016
 
2015
 
2016
 
2015
Balance, beginning of period
$
692,980

 
$
720,767

 
$
692,053

 
$
710,245

Reserves provided, net
25,317

 
(9,386
)
 
45,068

 
6,446

Payments
(10,991
)
 
(11,248
)
 
(29,815
)
 
(16,558
)
Balance, end of period
$
707,306

 
$
700,133

 
$
707,306

 
$
700,133