Fair Value Disclosures - Carrying Value and Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Mar. 05, 2014	Apr. 16, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage Backed Securities	$ 2,291	$ 0
Senior Notes [Member] | 5.25% Senior Notes due 2021 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long term debt interest rate	5.25%			5.25%
Senior Notes [Member] | 5.875% Senior Notes due 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long term debt interest rate	5.875%
Senior Notes [Member] | 5.625% Senior Notes due 2024 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long term debt interest rate	5.625%		5.625%
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale	$ 233,184	201,733
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Revolving Credit Facility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	0	115,000
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	198,564	183,444
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Loans Payable and Other Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	150,485	134,824
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Senior Notes [Member] | 5.25% Senior Notes due 2021 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	544,911	543,713
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Senior Notes [Member] | 5.875% Senior Notes due 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	346,431	345,840
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Senior Notes [Member] | 5.625% Senior Notes due 2024 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	346,142	345,604
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Interest Rate Lock Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage Backed Securities	1,987	0
Carrying Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage Backed Securities	304	0
Carrying Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	17,200	20,082
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale	233,184	201,733
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Revolving Credit Facility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	0	115,000
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	198,564	183,444
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Loans Payable and Other Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	150,485	134,824
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Senior Notes [Member] | 5.25% Senior Notes due 2021 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	563,750	552,750
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Senior Notes [Member] | 5.875% Senior Notes due 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	355,250	346,500
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Senior Notes [Member] | 5.625% Senior Notes due 2024 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt	353,500	336,000
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Interest Rate Lock Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage Backed Securities	1,987	0
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage Backed Securities	304	0
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	$ 17,200	$ 20,082