Investment Securities, at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013
Investment securities, maturities, amortized cost basis
Available-for-sale Securities, Amortized Cost Basis	$ 210,205		$ 62,041
Investment securities, maturities, fair value
Available-for-sale Securities, Gross Unrealized Gain	9,045		498
Available-for-sale Securities, Gross Unrealized Loss	(46)		(472)
Investment securities, at fair value	219,204	[1]	62,067	[1]	78,002
Commercial Mortgage Backed Securities [Member]
Investment securities, maturities, amortized cost basis
Due within one year	0
Due after one year through five years	1,202
Due after five years through 10 years	178,922
Due after 10 years	28,460
Amortized cost basis, total	208,584
Available-for-sale Securities, Amortized Cost Basis	208,584		60,452
Investment securities, maturities, fair value
Due within one year	0
Due after one year through five years	1,237
Due after five years through 10 years	186,042
Due after 10 years	30,034
Available-for-sale Securities, Gross Unrealized Gain	8,775		498
Available-for-sale Securities, Gross Unrealized Loss	(46)		(367)
Investment securities, at fair value	217,313		60,583
Securities Assets [Member]
Investment securities, maturities, amortized cost basis
Available-for-sale Securities, Amortized Cost Basis	1,621		1,589
Investment securities, maturities, fair value
Available-for-sale Securities, Gross Unrealized Gain	270		0
Available-for-sale Securities, Gross Unrealized Loss	0		(105)
Investment securities, at fair value	$ 1,891		$ 1,484

[1] For discussion on the restatement adjustments, see Note 2 - Restatement of Previously Issued Financial Statements.