Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	$ 107,525		$ 170,022
Loans held for sale	1,000,394		719,496
Derivative assets	4,469		5,493
Mortgage servicing rights	8,407		13,535
Derivative liabilities	64
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	107,525		170,022
Loans held for sale	1,000,394		719,496
Derivative assets	4,469		5,493
Derivative liabilities	64
Level 2 | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	169,200		192,600
Carrying value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	107,525		170,022
Loans held for sale	1,000,394		716,733
Derivative assets	4,469		5,493
Derivative liabilities	64
Carrying value | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	169,197		192,613
Derivative assets	4,469	[1]	5,493	[1]
Derivative liabilities	64	[2]
Carrying value | Fair value, measurements, recurring | SBA loan pools securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	1,702		1,736
Carrying value | Fair value, measurements, recurring | US government-sponsored entities and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	1,958		1,920
Carrying value | Fair value, measurements, recurring | Private label residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	5,067		14,752
Carrying value | Fair value, measurements, recurring | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	98,798		151,614
Carrying value | Fair value, measurements, recurring | Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	18,553	[3]	13,535	[3]
Carrying value | Fair Value, Measurements, Nonrecurring | Real estate 1-4 family first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	10,160		12,814
Carrying value | Fair Value, Measurements, Nonrecurring | Real estate mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,218		3,868
Carrying value | Fair Value, Measurements, Nonrecurring | Multi-family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,674		1,972
Carrying value | Fair Value, Measurements, Nonrecurring | HELOC, home equity loans, and other consumer credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	212		249
Carrying value | Fair Value, Measurements, Nonrecurring | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			33
Carrying value | Fair Value, Measurements, Nonrecurring | SBA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			10
Carrying value | Fair Value, Measurements, Nonrecurring | Other real estate owned real estate 1-4 family first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	150
Fair Value | Level 2 | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	169,197		192,613
Derivative assets	4,469	[1]	5,493	[1]
Derivative liabilities	64	[2]
Fair Value | Level 2 | Fair value, measurements, recurring | SBA loan pools securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	1,702		1,736
Fair Value | Level 2 | Fair value, measurements, recurring | US government-sponsored entities and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	1,958		1,920
Fair Value | Level 2 | Fair value, measurements, recurring | Private label residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	5,067		14,752
Fair Value | Level 2 | Fair value, measurements, recurring | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value	98,798		151,614
Fair Value | Level 2 | Fair value, measurements, recurring | Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	10,146	[3]
Fair Value | Level 2 | Fair Value, Measurements, Nonrecurring | Real estate 1-4 family first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,094		8,769
Fair Value | Level 2 | Fair Value, Measurements, Nonrecurring | Real estate mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			105
Fair Value | Level 2 | Fair Value, Measurements, Nonrecurring | HELOC, home equity loans, and other consumer credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	212		216
Fair Value | Level 2 | Fair Value, Measurements, Nonrecurring | Other real estate owned real estate 1-4 family first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	150
Fair Value | Level 3 | Fair value, measurements, recurring | Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	8,407	[3]	13,535	[3]
Fair Value | Level 3 | Fair Value, Measurements, Nonrecurring | Real estate 1-4 family first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	7,066		4,045
Fair Value | Level 3 | Fair Value, Measurements, Nonrecurring | Real estate mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,218		3,763
Fair Value | Level 3 | Fair Value, Measurements, Nonrecurring | Multi-family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,674		1,972
Fair Value | Level 3 | Fair Value, Measurements, Nonrecurring | HELOC, home equity loans, and other consumer credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			33
Fair Value | Level 3 | Fair Value, Measurements, Nonrecurring | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			33
Fair Value | Level 3 | Fair Value, Measurements, Nonrecurring | SBA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			$ 10

[1] Included in other assets on the consolidated statements of financial condition

[2] Included in accrued expenses and other liabilities on the consolidated statements of financial condition

[3] Included in servicing rights, net and servicing rights held for sale on the consolidated statements of financial condition