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Borrowings - Schedule of Remaining Borrowing Capacity with FHLB (Parenthetical) (Detail)		12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended
	Dec. 31, 2013 Interest Rate 2.09% [Member]	Dec. 31, 2013 Interest Rate 4.60% [Member]	Dec. 31, 2012 Interest Rate 4.60% [Member]	Jun. 30, 2009 Interest Rate 4.60% [Member]	Dec. 31, 2013 Interest Rate 4.02% [Member]	Dec. 31, 2012 Interest Rate 4.02% [Member]	Feb. 29, 2008 Interest Rate 4.02% [Member]	Dec. 31, 2013 Interest Rate 4.10% [Member]	Dec. 31, 2012 Interest Rate 4.10% [Member]	Aug. 31, 2008 Interest Rate 4.10% [Member]	Dec. 31, 2013 Interest Rate 4.47% [Member]	Dec. 31, 2012 Interest Rate 4.47% [Member]	Aug. 31, 2010 Interest Rate 4.47% [Member]	Dec. 31, 2013 Interest Rate 3.97% [Member]	Dec. 31, 2012 Interest Rate 3.97% [Member]	Oct. 31, 2009 Interest Rate 3.97% [Member]	Dec. 31, 2012 Interest Rate 4.72% [Member]	Dec. 31, 2013 Interest Rate 4.31% [Member]	Dec. 31, 2013 Interest Rate 5.24% [Member]	Dec. 31, 2013 Interest Rate 3.35% [Member]	Dec. 31, 2013 Interest Rate 4.00% [Member]	Dec. 31, 2013 Interest Rate 3.23% [Member]
Borrowings Under Repurchase Agreements [Line items]
Fixed rate on borrowings	2.09%	4.60%	4.60%	4.60%	4.02%	4.02%	4.02%	4.10%	4.10%	4.10%	4.47%	4.47%	4.47%	3.97%	3.97%	3.97%	4.72%	4.31%	5.24%	3.35%	4.00%	3.23%
FHLB advances, floating rate description		3 month LIBOR + 0.16%			3 month LIBOR + 0.11%			3 month LIBOR + 0.11%			3 month LIBOR + 0.11%			3 month LIBOR + 0.10%
FHLB advances, basis spread on floating rate		0.16%			0.11%			0.11%			0.11%			0.10%