XML 51 R41.htm IDEA: XBRL DOCUMENT v3.21.1
Comprehensive Income and Accumulated Other Comprehensive Income - Schedule of Changes in Accumulated Other Comprehensive Income (AOCI) (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance $ 438,816 $ 430,215
Other comprehensive income (loss) before reclassification (4,735) 1,830
Amounts reclassified from accumulated other comprehensive income (313) (346)
Net current period other comprehensive income (loss) (5,048) 1,484
Ending Balance 447,626 436,956
Accumulated Other Comprehensive Income (Loss) [Member]    
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance 21,019 12,211
Ending Balance $ 15,971 $ 13,695