Other Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
AMT carryover	$ 606		$ 869
Deferred tax assets, valuation allowance, current	0		0
Income (loss) from continuing operations before equity method investments, income taxes, extraordinary items, noncontrolling interest, total	4,662	$ 3,995	$ 15,900	$ 11,500
State and Local Jurisdiction [Member]
Operating loss carryforwards	$ 23,500
Minimum [Member] | State and Local Jurisdiction [Member]
Operating loss carryforwards, expiration date	Dec. 31, 2026
Maximum [Member] | State and Local Jurisdiction [Member]
Operating loss carryforwards, expiration date	Dec. 31, 2034