Annual report pursuant to Section 13 and 15(d)

Summary of Treasury Stock Activity (Detail)

v3.3.1.900
Summary of Treasury Stock Activity (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule of Treasury Stock [Line Items]      
Beginning Balance, Shares 4,057,135 3,694,935 3,553,085
Restricted stock forfeitures [1] 17,897 25,947 22,653
Restricted stock withholdings [2] 108,472 336,253 119,197
Ending Balance, Shares 4,183,504 4,057,135 3,694,935
Beginning Balance, Cost $ 61,807 $ 51,946 $ 48,482
Restricted stock forfeitures [1] 0 0 0
Restricted stock withholdings [2] 4,770 9,861 3,464
Ending Balance, Cost $ 66,577 $ 61,807 $ 51,946
[1] The Company repurchased forfeited and canceled restricted shares at a cost of $0.001 per share in accordance with the Company's Amended and Restated 2006 Long Term Incentive Plan.
[2] The Company withheld restricted shares as a result of the election by certain employees to satisfy their tax liabilities upon vesting in restricted stock. The Company determined the number of shares to be withheld based upon market values that ranged from $28.84 to $44.67 per share.