Mergers and Acquisitions - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified				0 Months Ended
	Jun. 30, 2014	Apr. 08, 2014	Dec. 31, 2013	Feb. 15, 2014 BCSB Bancorp, Inc. (BCSB) [Member]	Oct. 12, 2013 PVF Capital Corp (PVF) [Member]	Apr. 06, 2013 Annapolis Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Assets acquired as a result of merger		$ 390,000		$ 597,522	$ 741,058	$ 430,475
Value of acquisition		94,000
Exchange ratio		1.781
Loans acquired as a result of merger				308,389	512,795	256,212
Deposits acquired as a result of merger				532,197	628,205	349,370
Value of acquisition				80,544	109,856	56,300
Common shares issued				6,730,597	8,893,598	4,641,412
Common shares acquired				3,235,961	26,119,398	4,060,802
Goodwill recorded as a result of merger	805,514		764,248	41,500	52,605	35,854
Core deposit intangibles recorded as result of the acquisition				6,591	6,867	3,775
Contingent cash payment due to collection of loan						$ 609
Contingent cash payment due to collection of loan, per share						$ 0.15
Warrants converted to purchase common stock						342,564
Warrant expiration date						Jan. 30, 2019
Warrant exercise price						$ 3.57