CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
Issuance of shares of common stock pursuant to various stock compensation plans and agreements, shares	379,191	356,187
Cancellation of common stock due to forfeitures of issued restricted stock, shares		7,233
Restricted stock surrendered due to employee tax liability, shares	140,871	195,291
Issuance of shares pursuant to MetroCorp acquisition, shares		5,583,093