XML 83 R63.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Shareholders' Equity - Summary of Restricted Stock Awards (Detail) - Restricted Stock [Member] - 2007 Plan [Member] - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule Of Summary Of Restricted Stock Unit Activity [Line Items]      
Beginning balance , Nonvested shares 1,251 554 509
Granted , Nonvested shares 464 963 405
Vested , Nonvested shares (310) (217) (92)
Forfeited , Nonvested shares (84) (49) (268)
Ending balance , Nonvested shares 1,321 1,251 554
Beginning balance ,Weighted average grant date fair value $ 6.30 $ 9.75 $ 9.64
Granted ,Weighted average grant date fair value 7.50 5.21 9.88
Vested , Weighted average grant date fair value 7.24 9.50 9.78
Forfeited , Weighted average grant date fair value 6.36 9.80 9.70
Ending balance , Weighted average grant date fair value $ 6.80 $ 6.30 $ 9.75