Deposits (Escrow, Passbook And Investment Certificate Accounts) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Escrow Passbook And Investment Certificate Accounts [Line Items]
Interest bearing	$ 908,957	$ 744,917
Non-interest bearing	439,954	277,707
Escrow accounts	1,348,911	1,022,624
Passbook accounts	25,067	26,840
Less than one year	20,315	23,239
One to five years	16,900	20,533
Certificate accounts	37,215	43,772
Deposits, Total	$ 1,411,193	$ 1,093,236
Escrow accounts, Annualized interest rates	0.17%	0.25%
Passbook accounts, Annualized interest rates	0.60%	0.65%
Certificate accounts, Annualized interest rates	1.46%	1.81%