Condensed Consolidated Statement Of Stockholders' Equity (Parenthetical)	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Statement of Stockholders' Equity [Abstract]
Issuance of common stock (in shares)	176,272
Issuance of deferred stock units (in shares)	63,677
Special cash dividend (in usd per share) | $ / shares	$ 1.00