CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Issuance of shares of common stock pursuant to various stock compensation plans and agreements, shares	356,187	193,831
Cancellation of common stock due to forfeitures of issued restricted stock, shares	7,233	22,050
Restricted stock surrendered due to employee tax liability, shares	195,291	344,423
Purchase of treasury stock pursuant to the Stock Repurchase Program, shares		3,543,100
Issuance of shares pursuant to MetroCorp acquisition, shares	5,583,093