SHAREHOLDERS' EQUITY - Summary of Changes in Shareholders' Equity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Shareholders Equity [Line Items]
Beginning balance, value			$ 372,749
Net earnings	41,877	(3,465)	64,966	6,646
Dividends			(20,216)
Stock-based employee compensation expense, value			744
Ending balance, value	418,243		418,243
Common Stock [Member]
Shareholders Equity [Line Items]
Beginning balance, value			334
Beginning balance, shares			33,396,720
Stock-based employee compensation expense, shares			160
Ending balance, value	334		334
Ending balance, shares	33,396,880		33,396,880
Paid-in-Capital [Member]
Shareholders Equity [Line Items]
Beginning balance, value			461,426
Stock-based employee compensation expense, value			744
Ending balance, value	462,170		462,170
Dividends Paid in Excess of Earnings [Member]
Shareholders Equity [Line Items]
Beginning balance, value			(89,011)
Net earnings			64,966
Dividends			(20,216)
Ending balance, value	$ (44,261)		$ (44,261)