Capital Stock (Narrative) (Detail) - $ / shares shares in Thousands	Sep. 06, 2018	Dec. 31, 2018	Jun. 30, 2018	May 04, 2017
Dividends Payable [Line Items]
Common stock, shares authorized		75,000	75,000
Preferred stock, shares authorized		2,000	2,000
Dividends declared, per share amount	$ 0.01
Dividends declared, date of declaration	Sep. 06, 2018
Dividend paid, date	Oct. 09, 2018
Dividends declared, date of record	Sep. 24, 2018
Stock repurchase program
Dividends Payable [Line Items]
Number of shares authorized to be repurchased				5,000